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REFERENCES

  • Aloni R. & Barnett J.R. (1996) The development of phloem anastomoses between vascular bundles and their role in xylem regeneration after wounding in Dahlia and Cucurbita. Planta 198, 595603.
  • Aloni R., Wyse R.E. & Griffith S. (1986) Sucrose transport and phloem unloading in the stem of Vicia faba: possible involvement of a sucrose carrier and osmotic regulation. Plant Physiology 81, 482486.
  • Arsanto J.P. (1986) Ca2+ binding sites and phosphatase activities in sieve element reticulum and P-protein of chickpea phloem: a cytochemical and X-ray microanalysis survey. Protoplasma 132, 160171.
  • Balachandran S., Xiang Y., Schobert C., Thompson G.A. & Lucas W.J. (1997) Phloem sap proteins from Cucurbita maxima and Ricinus communis have the capacity to traffic cell to cell through plasmodesmata. Proceedings of the National Academy of Sciences USA 94, 1415014155.
  • Barclay G.F., Oparka K.J. & Johnson R.P.C. (1977) Induced disruption of the sieve element plastids in Heracleum mantegazzianum L. Journal of Experimental Botany 28, 709717.
  • Barker L., Kühn C., Weise A., Schulz A., Gebhardt C., Hirner B., Hellmann H., Schulze W., Ward J.M. & Frommer W.B. (2000) SUT2, a putative sucrose sensor in sieve elements. Plant Cell 12, 11531164.
  • Beebe D.U. & Russin W.A. (1999) Plasmodesmata in the phloem-loading pathway. In Plasmodesmata. Structure, Function, Role in Cell Communication (eds A.J.E.Van Bel & W.J.P.Van Kesteren), pp. 261293. Springer, Berlin, Germany.
  • Behnke H.-D. (1991a) Distribution and evolution of forms and types of sieve-element plastids in the dicotyledons.ALISO 3, 167182.
  • Behnke H.-D. (1991b) Non dispersive protein bodies in sieve elements: a survey and review of their origin, distribution and taxonomic significance.International Association of Wood Anatomists Bulletin 12, 143175.
  • Behnke H.-D. & Sjolund R.D. (1990) Sieve Elements. Comparative Structure, Induction and Development. Springer, Berlin, Germany.
  • Van Bel A.J.E. (1993) The transport phloem. Specifics of its functioning. Progress in Botany 54, 134150.
  • Van Bel A.J.E. (1995) The low-profile directors of carbon and nitrogen economy in plants: parenchyma cells associated with translocation channels. In Plant Stems. Physiology and Functional Morphology. (ed. B.L.Gartner), pp. 205222. Academic Press, San Diego, CA, USA.
  • Van Bel A.J.E. (1996) Interaction between sieve element and companion cell and the consequences for photoassimilate distribution. Two structural hardware frames with associated software packages in dicotyledons? Journal of Experimental Botany 47, 11291140.
  • Van Bel A.J.E. (1999) Evolution, polymorphology and multifunctionality of the phloem system. Perspectives in Plant Ecology, Evolution and Systematics 2, 163184.
  • Van Bel A.J.E. & Ehlers K. (2000) Symplasmic organization of the transport phloem and implications for photosynthate transfer to the cambium. In Cell and Molecular Biology of Wood Formation (eds R.Savidge, J.R.Barnett & R.Napier), pp. 8599. Bios, Oxford, UK.
  • Van Bel A.J.E. & Kempers R. (1991) Symplastic isolation of the sieve element-companion cell complex in the phloem of Ricinus communis and Salix alba. Planta 183, 6976.
  • Van Bel A.J.E. & Kempers R. (1997) The pore/plasmodesm unit; key element in the interplay between sieve element and companion cell. Progress in Botany 58, 278291.
  • Van Bel A.J.E. & Knoblauch M. (2000) Sieve element and companion cell: the story of the comatose patient and the hyperactive nurse. Australian Journal of Plant Physiology 27, 477487.
  • Van Bel A.J.E. & Van Rijen H.V.M. (1994) Microelectrode-recorded development of the symplasmic autonomy of the sieve element/companion cell complex in the stem phloem of Lupinus luteus L. Planta 192, 165175.
  • Van Bel A.J.E., Ammerlaan A. & Van Dijk A.A. (1994) A three-step screening procedure to identify the mode of phloem loading in intact leaves. Evidence for symplasmic and apoplasmic phloem loading associated with the type of companion cell. Planta 192, 3139.
  • Van Bel A.J.E., Ehlers K. & Knoblauch M. (2002) Sieve elements caught in the act. Trends in Plant Science 7, 126132.
  • Van Bel A.J.E., Gamalei Y.V., Ammerlaan A. & Bik L.P.M. (1992) Dissimilar phloem loading in leaves with symplastic and apoplastic minor vein configurations. Planta 186, 518525.
  • Blackman L.M., Boevink P., Santa Cruz S., Palukaitis P. & Oparka K.J. (1998) The movement protein of cucumber mosaic virus traffics into sieve elements in minor veins of Nicotiana clevelandii. Plant Cell 10, 527537.
  • Bostwick D.E., Dannenhoffer J.M., Skaggs M.I., Lister R.M., Larkins B.A. & Thompson G.A. (1992) Pumpkin phloem lectin genes are specifically expressed in companion cells. The Plant Cell 4, 15391548.
  • Botha C.E.J. & Cross R.H.M. (2000) Towards reconciliation of structure with function in plasmodesmata – who is the gatekeeper? Micron 21, 713721.
  • Botha C.E.J. & Cross R.H.M. (2001) Regulation within the supracellular highway – plasmodesma are the key. South African Journal of Botany 67, 19.
  • Bouché-Pillon S., Fleurat-Lessard P., Fromont J.-C., Serrano R. & Bonnemain J.-L. (1994) Immunolocalisation of the plasma membrane H+-ATPase in minor veins of Vicia faba in relation to phloem loading. Plant Physiology 105, 691697.
  • Büttner M., Truernit E., Baier K., Scholz-Starke J., Sontheim M., Lauterbach C., Huss V.A.R. & Sauer N. (2000) AtSTP3, a green leaf-specific, low-affinity monosaccharide-H+ symporter of Arabidopsis thaliana. Plant, Cell and Environment 23, 175184.
  • Canny M.J. (1990) What becomes of the transpiration stream? New Phytologist 114, 341368.
  • Chiou T.J. & Bush D.R. (1998) Sucrose is a signal molecule in assimilate partitioning. Proceedings of the National Academy of Sciences USA 95, 47844788.
  • Christeller J.T., Farley P.C., Ramsay R.J. & Laing W.A. (1998) Purification, characterization and cloning of an aspartic protease inhibitor from squash phloem exudate. European Journal of Biochemistry 254, 160167.
  • Citovsky V. & Zambryski P. (2000) Systemic transport of RNA in plants. Trends in Plant Science 5, 5254.
  • Clark A.M., Jacobsen K.R., Dannenhoffer J.M., Skaggs M.I. & Thompson G.A. (1997) Molecular characterization of a phloem-specific gene encoding for the filament protein, phloem protein 1 (PP1) from Cucurbita maxima. Plant Journal 12, 4961.
  • Cronshaw J. & Sabnis D.D. (1990) Phloem proteins. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 257283. Springer, Berlin, Germany.
  • Daie J. (1987) Sucrose uptake in the isolated phloem of celery is a single saturable system. Planta 171, 474482.
  • Dannenhoffer J.M., Schulz A., Skaggs M.I., Bostwick D.E. & Thompson G.A. (1997) Expression of the phloem lectin is developmentally linked to vascular differentiation in cucurbits. Planta 201, 405414.
  • Dannenhoffer J.M., Suhr S.C. & Thompson G.A. (2001) Phloem-specific expression of the pumpkin fruit trypsin inhibitor. Planta 212, 155162.
  • Davis J.D. & Evert R.F. (1970) Seasonal development of phloem in woody vines. Botanical Gazette 131, 128138.
  • Deeken R., Sanders C., Ache P. & Hedrich R. (2000) Development and light-dependent regulation of a phloem-localised K+ channel of Arabidopsis thaliana. Plant Journal 23, 285290.
  • DeWitt N.D. & Sussman M.R. (1995) Immunocytological localisation of an epitope-tagged plasma membrane proton pump (H+-ATPase) in phloem companion cells. Plant Cell 7, 20532067.
  • DeWitt N.D., Harper J.F. & Sussman M.R. (1991) Evidence for a plasma membrane proton pump in phloem cells of higher plants. Plant Journal 1, 121128.
  • DeWitt N.D., Hong B., Sussman M.R. & Harper J.F. (1996) Targeting of two Arabidopsis H+-ATPase isoforms to the plasma membrane. Plant Physiology 112, 833844.
  • Dick P.S. & Ap Rees T. (1975) The pathway of sugar transport in roots of Pisum sativum. Journal of Experimental Botany 26, 305314.
  • Ding B., Haudenshield J.S., Willmitzer L. & Lucas W.J. (1993) Correlation between arrested plasmodesmatal development and the onset of accelerated leaf senescence in yeast invertase transgenic tobacco plants. Plant Journal 4, 179189.
  • Ehlers K., Binding H. & Kollmann R. (1999) The formation of symplasmic domains by plugging of plasmodesmata: a general event in plant morphogenesis? Protoplasma 209, 181192.
  • Ehlers K., Knoblauch M. & Van Bel A.J.E. (2000) Ultrastructural features of well-preserved and injured sieve elements: minute clamps keep the phloem transport conduits free for mass flow. Protoplasma 214, 8092.
  • Eleftheriou E. (1990) Monocotyledons. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 139159. Springer, Berlin, Germany.
  • Esau K. (1969) The Phloem. Encyclopedia of Plant Anatomy, Vol. 5. Bornträger, Berlin, Germany.
  • Eschrich W., Currier H.B., Yamaguchi S. & McNairn R.B. (1965) Der Einfluss verstärkter Callosebildung auf den Stofftransport in Siebröhren. Planta 65, 4964.
  • Eschrich W., Evert R.F. & Young J.H. (1972) Solution flow in tubular semipermable membranes. Planta 107, 279300.
  • Evert R.F. (1990a) Seedless vascular plants. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 3562. Springer, Berlin, Germany.
  • Evert R.F. (1990b) Dicotyledons. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 103137. Springer, Berlin, Germany.
  • Evert R.F. & Russin W.A. (1993) Structurally phloem unloading in the maize leaf cannot be symplastic. American Journal of Botany 80, 13101317.
  • Evert R.F., Tucker C.M., Davis J.D. & Deshpande B.P. (1969) Light microscope investigation of sieve element ontogeny and structure in Ulmus americana. American Journal of Botany 56, 9991017.
  • Fagard M. & Vaucheret M. (2000) (Trans) gene silencing in plants: how many mechanisms? Annual Review of Plant Physiology and Plant Molecular Biology 51, 167194.
  • Fischer W.-N., André B., Rentsch D., Krolkiewicz S., Tegeder M., Breitkreuz K. & Frommer W.B. (1998) Amino acid transport in plants. Trends in Plant Science 3, 188195.
  • Fisher D.B. & Cash-Clark C.E. (2000) Gradients in water potential and turgor pressure along the translocation pathway during grain filling in normally watered and water-stressed wheat plants. Plant Physiology 123, 139147.
  • Fisher D.B., Wu K. & Ku M.S.B. (1992) Turnover of soluble proteins in the wheat sieve tube. Plant Physiology 100, 14331441.
  • Gamalei Y.V. (1989) Structure and function of leaf minor veins in trees and herbs. Trees 3, 96110.
  • Gamalei Y.V. (1990) Leaf Phloem. Nauka, Leningrad, Russia. (in Russian)
  • Gamalei Y.V. (1991) Phloem loading and its development related to plant evolution from trees to herbs. Trees 5, 5064.
  • Geigenberger P., Lerchl J., Stitt M. & Sonnewald U. (1996) Phloem-specific expression of pyrophosphatase inhibits long-distance transport of carbohydrates and amino acids in tobacco plants. Plant, Cell and Environment 19, 4355.
  • Goeschl J.D. & Magnuson C.E. (1986) Physiological implications of the Münch–Horwitz theory of phloem loading: effect of loading rates. Plant, Cell and Environment 9, 95102.
  • Goggin F.L., Medville R. & Turgeon R. (2001) Phloem loading in the tulip tree. Mechanisms and evolutionary implications. Plant Physiology 124, 891899.
  • Golecki B., Schulz A., Carstens-Behrens U. & Kollmann R. (1998) Evidence for graft transmission of structural phloem proteins or their precursors in heterografts of Cucurbitaceae. Planta 206, 630640.
  • Golecki B., Schulz A. & Thompson G.A. (1999) Translocation of structural P proteins in the phloem. Plant Cell 11, 127140.
  • Gottwald J.R., Krysan P.J., Young J.C., Evert R.F. & Sussman M.R. (2000) Genetic evidence for the in planta role of phloem-specific plasma membrane sucrose transporters. Proceedings of the National Academy of Sciences USA 97, 1397913984.
  • Graham L.E. (1993) The Origin of Land Plants. Wiley, New York, USA.
  • Grimm E., Bernhardt G., Rothe K. & Jacob F. (1990) Mechanisms of sucrose retrieval along the phloem path – a kinetic approach. Planta 182, 480485.
  • Grimm E., Jahnke S. & Rothe K. (1997) Photoassimilate translocation in the petiole of Cyclamen and Primula is independent of lateral retrieval. Journal of Experimental Botany 48, 10871094.
  • Haebel S. & Kehr J. (2001) Matrix-assisted desorption/ionization time of flight mass spectrometry peptide mass fingerprints and post source decay: a tool for the identification and analysis of phloem proteins from Cucurbita maxima Duch. separated by two-dimensional polyacrylamide gel electrophoresis. Planta 213, 586593.
  • Haritatos E., Ayre B.G. & Turgeon R. (2000) Identification of phloem involved in assimilate loading in leaves by the activity of the galactinol synthese promoter. Plant Physiology 123, 929937.
  • Hartmann T. (1999) Chemical ecology of pyrrolizidine alkaloids. Planta 207, 483495.
  • Hayashi H., Fukuda A., Suzui N. & Fujimaki S. (2000) Proteins in the sieve tube-companion cell complexes: their detection, localization and possible functions. Australian Journal of Plant Physiology 27, 489496.
  • Hayes P.M., Offler C.E. & Patrick J.W. (1985) Cellular structures, plasma membrane surface areas and plasmodesmatal frequencies of the stem of Phaseolus vulgaris L. in relation to radial photosynthate transfer. Annals of Botany 56, 125138.
  • Hellmann H., Barker L., Funck D. & Frommer W.B. (2000) The regulation of assimilate allocation and transport. Australian Journal of Plant Physiology 27, 583594.
  • Hsu F.C. & Kleier D.A. (1996) Phloem mobility of xenobiotics VIII A short review. Journal of Experimental Botany 47, 12651271.
  • Imlau A., Truernit E. & Sauer N. (1999) Cell-to-cell and long-distance trafficking of the green fluorescent protein in the phloem and symplastic unloading of the protein into the sinks. Plant Cell 11, 309322.
  • Iqbal M. (1995) Ultrastructural differentiation of sieve elements. In The Cambial Derivatives (ed. M.Iqbal), pp. 241270. Bornträger, Berlin, Germany.
  • Ishiwatari Y., Fujiwara T., McFarland K.C., Nemoto K., Hayashi H., Chino M. & Lucas W.J. (1998) Rice phloem thioredoxin h has the capacity to mediate its own cell-to-cell transport through plasmodesmata. Planta 205, 1222.
  • Jacinto T., McGurl B., Franceschi V., Delano-Freier J. & Ryan C.A. (1997) Tomato prosystemin promoter confers wound-inducible, vascular bundle-specific expression of the β-glucoronidase gene in transgenic tomato plants. Planta 203, 406412.
  • Jang J.-C., Leon P., Zhou L. & Sheen J. (1997) Hexokinase as a sugar sensor in higher plants. Plant Cell 9, 519.
  • Johnson R.P.C., Freundlich A. & Barclay G.F. (1976) Transcellular strands in sieve tubes: what are they? Journal of Experimental Botany 101, 11271136.
  • Jorgensen R.A., Atkinson R.G., Forster R.L.S. & Lucas W.J. (1998) An RNA-based information superhighway in plants. Science 279, 14861487.
  • Kehr J., Haebel S., Blechschmidt-Schneider S., Willmitzer L., Steup M. & Fisahn J. (1999) Analysis of phloem protein patterns from different organs of Cucurbita maxima Duch by matrix-assisted laser desorption/ioniosation time of flight mass spectroscopy combined with sodium dodecyl sulfate polyacrylamide gel electrophoresis. Planta 207, 612619.
  • Kempers R., Ammerlaan A. & Van Bel A.J.E. (1998) Symplasmic constriction and ultrastructural features of the sieve element/companion cell complex in the transport phloem of apoplasmically and symplasmically phloem-loading species. Plant Physiology 116, 271278.
  • Kempers R. & Van Bel A.J.E. (1997) Symplasmic connections between sieve element and companion cell in the stem phloem of Vicia faba L. have a size exclusion limit of at least 10 kDa. Planta 201, 195201.
  • Kim M., Canio W., Kessler S. & Sinha S. (2001) Developmental changes due to long-distance movement of a homeobox fusion transcript in tomato. Science 293, 287289.
  • Kim J.-Y., Mahé A., Brangeon J. & Prioul J.-L. (2000) A vascular maize invertase, Ivr2, is induced by water stress. Organ/tissue specificity and diurnal modulation of expression. Plant Physiology 124, 7184.
  • Knoblauch M. & Van Bel A.J.E. (1998) Sieve tubes in action. Plant Cell 10, 3550.
  • Knoblauch M., Hibberd J.M., Gray J.C. & Van Bel A.J.E. (1999) A galinstan expansion femtosyringe for microinjection of eukaryotic organelles and prokaryotes. Nature Biotechnology 17, 906909.
  • Knoblauch M., Peters W.S., Ehlers K. & Van Bel A.J.E. (2001) Reversible calcium-regulated stopcocks in legume sieve tubes. Plant Cell 13, 12211230.
  • Koch K.E. & Nolte K.D. (1995) Sugar-modelled expression of genes for sucrose metabolism and their relationship to transport pathways. In Carbon Partitioning and Source–Sink Interactions in Plants (eds M.A.Madore & W.J.Lucas), pp. 145155. American Society of Plant Physiologists, Rockville, MD, USA.
  • Köckenberger W. (2001) Nuclear magnetic resonance micro-imaging in the investigation of plant cell metabolism. Journal of Experimental Botany 52, 641652.
  • Köckenberger W., Pope W.J., Xia Y., Jeffrey K.R., Komor E. & Callaghan P.T. (1997) A non-invasive measurement of phloem and xylem water flow in castor bean seedlings by nuclear magnetic resonance microimaging. Planta 201, 5363.
  • Kollmann R. (1973) Cytologie des Phloems. In Grundlagen der Cytologie (eds H.Ruska & P.Sitte), pp. 479505. Gustav Fischer, Jena, Germany.
  • Koroleva O.A., Farrar J.F., Tomos A.D. & Pollock C.J. (1998) Carbohydrates in individual cells of epidermis, mesophyll, and bundle sheath in barley leaves with changed export or photosynthetic rate. Plant Physiology 118, 15251532.
  • Kragler F., Monzer J., Xoconostle-Cazares B. & Lucas W.J. (2000) Peptide antagonists of the plasmodesmal macromolecular trafficking pathway. EMBO Journal 19, 28562868.
  • Kühn C., Franceschi V.R., Schulz A., Lemoine R. & Frommer W.B. (1997) Macromolecular trafficking indicated by localization and turnover of sucrose transporters in enucleate sieve elements. Science 275, 12981300.
  • Kühn C., Quick W.P., Schulz A., Riesmeier J.W., Sonnewald U. & Frommer W.B. (1996) Companion cell-specific inhibition of the potato sucrose transporter SUT1. Plant, Cell and Environment 19, 11151123.
  • Lacombe B., Pilot G., Michard E., Gaymard F., Sentenac H. & Thibaud J.-B. (2000) A shaker-like K+ channel with weak rectification is expressed in both source and sink phloem tissues of Arabidopsis. Plant Cell 12, 837851.
  • Lalonde S., Boles E., Hellmann H., Barker L., Patrick J.W., Frommer W.B. & Ward J.M. (1999) The dual function of sugar carriers: transport and sugar sensing. Plant Cell 11, 707726.
  • Langhans M., Ratajczak R., Lützelschwab M., Michalke W., Wächter R., Fischer-Schliebs E. & Ullrich C.E. (2001) Immunolocalization of plasma membrane H+-ATPase and tonoplast-type pyrophosphatase of the sieve element-companion cell complex in the stem of Ricinus communis L. Planta 213, 1119.
  • Lawton D.M. (1978a) P-protein crystals do not disperse in uninjured sieve elements in roots of runner bean (Phaseolus multiflorus) fixed with glutaraldehyde. Annals of Botany 42, 353361.
  • Lawton D.M. (1978b) Ultrastructural comparison of the tailed and tailless P-proteins respectively of runner bean (Phaseolus vulgaris) and garden pea (Pisum sativum) with tilting stage electron microscopy. Protoplasma 97, 111.
  • Lehmann J. (1979) Nachweis von ATP und ATPase in den Siebröhren von Cucurbita pepo. Zeitschrift für Pflanzenphysiologie 94, 331338.
  • Leineweber K., Schulz A. & Thompson G.A. (2000) Dynamic transitions in the translocated phloem filament protein. Australian Journal of Plant Physiology 27, 733741.
  • Lemoine R., Kühn C., Thiele N., Delrot S. & Frommer W.B. (1996) Antisense inhibition of the sucrose transporter in potato: effects on amount and activity. Plant, Cell and Environment 19, 11241131.
  • Lerchl J., Geigenberger P., Stitt M. & Sonnewald U. (1995) Impaired photoassimilate partitioning caused by phloem-specific removal of pyrophosphate can be complemented by a phloem-specific cytosolic yeast-derived invertase in transgenic plants. Plant Cell 7, 259270.
  • Lichtner F. (2000) Phloem mobility of crop protection products. Australian Journal of Plant Physiology 27, 609614.
  • Linstead P., Dolan L. & Roberts K. (1993) Roots: wild type structure. Arabidopsis. An Atlas of Morphology and Development. (ed. J.Bowman), pp. 102103. Springer, Berlin, Germany.
  • Lohaus G., Winter H., Riens B. & Heldt H.W. (1995) Further studies of the phloem loading process in leaves of barley and spinach. The comparison of metabolite concentrations in the apoplastic compartment with those in the cytosolic compartment and in the sieve tubes. Botanica Acta 108, 270275.
  • Lucas W.J. (1999) Plasmodesmata and the cell-to-cell transport of proteins and nucleoprotein complexes. Journal of Experimental Botany 50, 979987.
  • Lucas W.J., Ding B. & Van Der Schoot C. (1993) Plasmodesmata and the supracellular nature of plants. New Phytologist 125, 435476.
  • Lucas W.J., Yoo B.C. & Kragler F. (2001) RNA as a long-distance information macromolecule in plants. Nature Reviews/Molecular Cell Biology 2, 849857.
  • Magnuson C.E., Goeschl J.D. & Fares Y. (1986) Experimental tests of the Münch–Horwitz theory of phloem transport: effect of loading rates. Plant, Cell and Environment 9, 103109.
  • Marten I., Hoth S., Deeken R., Ketchum K.A., Hoshi T. & Hedrich R. (1999) AKT3, a phloem-localised K+ channel is blocked by protons. Proceedings of the National Academy of Science USA 96, 75817586.
  • Martin T., Frommer W.B., Salanabout M. & Willmitzer L. (1993) Expression of an Arabidopsis sucrose synthase gene indicates a role in metabolization of sucrose both during phloem loading and in sink organs. Plant Journal 4, 367377.
  • McNairn R.B. & Currier H.B. (1968) Translocation blockage by sieve plate callose. Planta 82, 369380.
  • Minchin P.E.H. & Thorpe M.R. (1984) Apoplastic phloem unloading in the stem of bean. Journal of Experimental Botany 35, 538550.
  • Minchin P.E.H. & Thorpe M.R. (1987) Measurement of unloading and reloading of photo-assimilate within the stem of bean. Journal of Experimental Botany 38, 211220.
  • Moriau L., Michelet B., Bogaerts P., Lambert L. & Michel A. (1999) Expression analysis of two gene subfamilies encoding the plasma membrane H+-ATPase in Nicotiana plumbaginifolia reveals the major transport functions of this enzyme. Plant Journal 19, 3141.
  • Münch E. (1930) Die Stoffbewegungen in der Pflanze. Gustav Fischer, Jena, Germany.
  • Murray C. & Christeller J.T. (1995) Purification of a trypsin inhibitor (PFT1) from pumpkin fruit phloem exudate and isolation of putative trypsin and chymotrypsin inhibitor cDNA clones. Biological Chemistry 276, 281287.
  • Nakamura S., Hayashi H., Mori S. & Chino M. (1993) Protein phosphorylation in the sieve tubes of rice plants. Plant and Cell Physiology 34, 927933.
  • Narvaez-Vasquez J., Orozco-Cardenas M.L., Franceschi V.R. & Ryan C.A. (1995) Autoradiographic and biochemical evidence for the systemic translocation of systemin in tomato plants. Planta 195, 593600.
  • Nelson R.S. & Van Bel A.J.E. (1998) The mystery of virus trafficking into, through and out of the vascular bundles. Progress in Botany 59, 476533.
  • Niklas K.J. (1997) The Evolutionary Biology of Plants. University of Chicago Press, Chicago, London.
  • Noiraud N., Delrot S. & Lemoine R. (2000) The sucrose transporter of celery. Identification and expression during salt stress. Plant Physiology 122, 14471455.
  • Noiraud N., Maurousset L. & Lemoine R. (2001) Identification of a mannitol transporter, AgMaT1, in celery phloem. Plant Cell 13, 695705.
  • Nolte K.D. & Koch K.E. (1993) Companion-cell specific localization of sucrose synthase in zones of phloem loading and unloading. Plant Physiology 101, 899905.
  • Öczan S., Dover J. & Johnston M. (1998) Glucose sensing and signaling by two glucose receptors in the yeast Saccharomyces cerevisiae. EMBO Journal 17, 25662673.
  • Offler C.E. & Patrick J.W. (1984) Cellular structures, plasma membrane surface areas and plasmodesmatal frequencies of seed coats of Phaseolus vulgaris L. in relation to photosynthate transfer. Australian Journal of Plant Physiology 11, 7990.
  • Oparka K.J. & Gates P. (1981) Transport of assimilates in the developing caryopsis of rice (Oryza sativa L.). Ultrastructure of the pericarp vascular bundle and its connections with the aleurone layer. Planta 151, 561573.
  • Oparka K.J. & Santa Cruz S. (2000) The great escape: phloem transport and unloading of macromolecules. Annual Review of Plant Physiology and Plant Molecular Biology 51, 323347.
  • Oparka K.J. & Turgeon R. (1999) Sieve elements and companion cells – traffic control centers of the phloem. Plant Cell 11, 739750.
  • Oparka K.J., Duckett C.M., Prior D.A.M. & Fisher D.B. (1994) Real-time imaging of phloem unloading in the root tip of Arabidopsis. Plant Journal 6, 759766.
  • Oparka K.J., Prior D.A.M. & Wright K.M. (1995) Symplastic communication between primary and developing lateral roots of Arabidopsis thaliana. Journal of Experimental Botany 46, 187197.
  • Oparka K.J., Viola R., Wright K.M. & Prior D.A.M. (1992) Sugar transport and metabolism in the potato tuber. In Carbon Partitioning Within and Between Organs (eds C.J.Pollock, J.F.Farrar & A.J.Gordon), pp. 91114. Bios, Oxford, UK.
  • Palauqui J.C., Elmayan T., Dorlhac de Borne F., Crété P., Charles C. & Vaucheret H. (1996) Frequencies, timing, and spatial patterns of co-suppression of nitrate reductase and nitrite reductase in transgenic tobacco plants. Plant Physiology 112, 14471456.
  • Palauqui J.C., Elmayan T., Pollien J.-M. & Vaucheret H. (1997) Systemic acquired silencing: transgene-specific post-translational silencing is transmitted by grafting from silenced to non-silenced scions. EMBO Journal 16, 47384745.
  • Palevitz B.A. & Newcomb E.H. (1971) The ultrastructure and development of tubular and crystalline P protein in the sieve elements of certain papilionaceous legumes. Protoplasma 72, 399427.
  • Pate J.S., Peoples M.B., Van Bel A.J.E., Kuo J. & Atkins C.A. (1985) Diurnal water balance of the cowpea fruit. Plant Physiology 77, 148156.
  • Patrick J.W. (1990) Sieve element unloading: cellular, mechanism and control. Physiologia Plantarum 78, 298308.
  • Patrick J.W. (1997) Phloem unloading. Sieve element unloading and post-sieve element transport. Annual Review of Plant Physiology and Plant Molecular Biology 28, 165190.
  • Patrick J.W. & Offler C.E. (1996) Post-sieve element transport of photoassimilates in sink regions. Journal of Experimental Botany 47, 11651177.
  • Patrick J.W., Zhang W., Tyerman S.D., Offler C.E. & Walker N.A. (2001) Role of membrane transport in phloem translocation of assimilates and water. Australian Journal of Plant Physiology 28, 695707.
  • Pfluger J. & Zambryski P. (2001) Cell growth: the power of symplastic isolation. Current Biology 11, 436439.
  • Phillipar K., Fuchs I., Lüthen H., et al. (1999) Auxin-induced K+ channel expression represents an essential step in coleoptile growth and gravitropism. Proceedings of the National Academy of Science USA 96, 1218612191.
  • Pritchard J., Winch S. & Gould N. (2000) Phloem water relations and root growth. Australian Journal of Plant Physiology 27, 539548.
  • Prüfer D., Schmitz J., Tacke E., Kull B. & Rohde W. (1997) In vivo expression of full-length cDNA copy of potato leafroll virus (PLRV) in protoplasts and transgenic plants. Molecular and General Genetics 253, 609614.
  • Radford J., Vesk M. & Overall R.L. (1998) Callose deposition at plasmodesmata. Protoplasma 201, 3037.
  • Raven J.A. (1991) Long-term functioning of enucleate sieve elements: possible mechanisms of damage avoidance and damage repair. Plant, Cell and Environment 14, 139146.
  • Read S.M. & Northcote D.H. (1983) Chemical and immunological similarities between the phloem proteins of three genera of Cucurbitaceae. Planta 158, 119127.
  • Rhodes J., Thain J.F. & Wildon D.C. (1996) The pathway for systemic electrical signal transduction in the wounded tomato plant. Planta 200, 5057.
  • Riesmeier J.W., Hirner B. & Frommer W.B. (1993) Potato sucrose transporter expression in minor veins indicates a role in phloem loading. Plant Cell 5, 15911598.
  • Riesmeier J.W., Willmitzer L. & Frommer W.B. (1994) Evidence for an essential role of the sucrose transporter in phloem loading and assimilate partitioning. EMBO Journal 13, 18.
  • Robidoux J., Sandborn E.B., Fensom D.S. & Cameron M.L. (1973) Plasmatic filaments and particles in mature sieve elements of Heracleum sphondylium under the electron microscope. Journal of Experimental Botany 79, 349359.
  • Robinson D.G., Sieber H., Kammerloher W. & Schäffner A.R. (1996) PIP1 aquaporins are concentrated in plasmalemmasomes of Arabidopsis thaliana mesophyll. Plant Physiology 111, 645649.
  • Rokitta M., Peuke A.D., Zimmermann U. & Haase A. (1999) Dynamic studies of phloem and xylem flow in fully differentiated plants using fast NMR micro-imaging. Protoplasma 209, 126131.
  • Rook F., Weisbeek P.J. & Smeekens S.C.M. (1998) The light-controlled Arabidopsis bZIP transcription factor factor gene ATB2 encodes a protein with an unusually long leucine zipper domain. Plant Molecular Biology 37, 171178.
  • Ruan Y.-L., Llewellyn D.J. & Furbank R.T. (2001) The control of single-celled cotton fiber elongation by developmentally reversible gating of plasmodesmata and coordinated expression of sucrose and K+ transporters and expansin. Plant Cell 13, 4760.
  • Ruiz-Medrano R. & Xoconostle-Cazares B. & Lucas W.J. (1999) Phloem long-distance transport of CmNACP-1 mRNA: implications for supracellular regulation in plants. Development 126, 44054419.
  • Ruiz-Medrano R., Xoconostle-Cazares B. & Lucas W.J. (2001) The phloem as a conduit for inter-organ communication. Current Opinion in Plant Biology 4, 202209.
  • Ryals J.A., Neuenschwander U.H., Willits M.G., Molina A., Steiner H.-Y. & Hunt M.D. (1996) Systemic acquired resistance. Plant Cell 8, 18091819.
  • Sakuth T., Schobert C., Pecsvaradi A., Eichholz A., Komor E. & Orlich G. (1993) Specific proteins in the sieve-tube exudate of Ricinus communis L. seedlings: separation, characterization and in-vivo labelling. Planta 191, 207213.
  • Salmon S., Lemoine R., Jamaï A. & Bouché-Pillon S. (1995) Study of sucrose and mannitol transport in plasma-membrane vesicles from phloem and non-phloem tissue of celery (Apium graveolens L.) petioles. Planta 197, 7684.
  • Santa Cruz S. (1999) Perspective: phloem transport of viruses and macromolecules – what goes in must come out. Trends in Microbiology 7, 237241.
  • Sasaki T., Chino M., Hayashi H. & Fujiwara T. (1998) Detection of several mRNA species in rice phloem sap. Plant Cell Physiology 39, 895897.
  • Schäffner A.R. (1998) Aquaporin function, structure, and expression: are there more surprises to surface in water relations? Planta 204, 131139.
  • Scheirer D.C. (1990) Mosses. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 1933. Springer, Berlin, Germany.
  • Schmitz K. (1990) Algae. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 118. Springer, Berlin, Germany.
  • Schobert C., Baker L., Szederkenyi J., Großmann P., Komor E., Hayashi H., Chino M. & Lucas W.J. (1998) Identification of immunologically related proteins in sieve-tube exudate collected from monocotyledonous and dicotyledonous plants. Planta 206, 245252.
  • Schobert C., Großmann P., Gottschalk M., Komor E., Pecsvaradi A. & Zur Nieden U. (1995) Sieve-tube exudate from Ricinus communis L. seedlings contains ubiquitin and chaperones. Planta 196, 205210.
  • Van Der Schoot C. & Van Bel A.J.E. (1989) Glass microelectrode measurements of sieve tube membrane potentials in internodes and petioles of tomato (Solanum lycopersicum L.). Protoplasma 149, 144154.
  • Schrier A.A. (2001) Der Einfluß der Temperatur auf das Funktionieren, die Evolution und die Verbreitung apoplasmatischer und symplasmatischer Phloembeladung. Thesis. University of Gießen, Gießen, Germany.
  • Schulz A. (1990) Conifers. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 6388. Springer, Berlin, Germany.
  • Schulz A. (1994) Phloem transport and differential unloading in pea seedlings after source and sink manipulations. Planta 192, 239248.
  • Schulz A. (1995) Plasmodesmal widening accompanies the short-term increase in symplasmic phloem unloading in root tips under osmotic stress. Protoplasma 118, 2237.
  • Schulz A. (1998) Phloem. Structure related to function. Progress in Botany 59, 429475.
  • Schulz A., Kühn C., Riesmeier J.W. & Frommer W.B. (1998) Ultrastructural effects in potato leaves due to anti-sense inhibition of the sucrose transporter indicate an apoplasmic mode of phloem loading. Planta 206, 533543.
  • Scott P.C., Miller L.W., Webster B.D. & Leopold A.C. (1967) Structural changes during bean leaf abcission. American Journal of Botany 54, 730734.
  • Sjolund R.D. (1997) The phloem sieve element. A river flows through it. Plant Cell 9, 11371146.
  • Sjolund R.D. & Shih C.Y. (1983) Freeze-fracture analysis of phloem structure in plant tissue cultures. I. The sieve element reticulum. Journal of Ultrastructural Research 82, 111121.
  • Smeekens S. (2000) Sugar-induced signal transduction in plants. Annual Review of Plant Physiology and Plant Molecular Biology 51, 4981.
  • Smith J.A.C. & Milburn J.A. (1980a) Osmoregulation and the control of phloem-sap composition in Ricinus communis L. Planta 148, 2834.
  • Smith J.A.C. & Milburn J.A. (1980b) Phloem turgor and the regulation of sucrose loading in Ricinus communis L. Planta 148, 4248.
  • Sokolova M., Prüfer D., Tacke E. & Rohde W. (1997) The potato leaf roll virus 17K movement protein is phosphorylated by a membrane-associated protein kinase from potato with biochemical features of proten kinase C. FEBS Letters 400, 201205.
  • Soltis D.E., Soltis P.S., Chase M.W., et al. (2000) Angiosperm phylogeny inferred from 18S rDNA, rbcL, and atpB sequences. Botanical Journal of the Linnean Society 133, 381461.
  • Stadler R. & Sauer N. (1996) The Arabidopsis thaliana AtSUC2 gene is specifically expressed in companion cells. Botanica Acta 109, 299306.
  • Stadler R., Brandner H., Schulz A., Gahrtz M. & Sauer N. (1995) Phloem loading by the PmSUC2 sucrose carrier from Plantago major occurs in companion cells. Plant Cell 7, 15451554.
  • Staehelin L.A. (1997) The plant ER: a dynamic organelle composed of a large number of discrete functional domains. Plant Journal 11, 11511165.
  • Taylor E.L. (1990) Phloem evolution: an appraisal based on the fossil record. In Sieve Elements. Comparative Structure, Induction and Development (eds H.-D.Behnke & R.D.Sjolund), pp. 285298. Springer, Berlin, Germany.
  • Thaine R. (1962) A translocation hypothesis based on the structure of plant cytoplasm. Journal of Experimental Botany 13, 152160.
  • Thaine R. (1969) Movement of sugars through plants by cytoplasmic pumping. Nature 222, 873875.
  • Thompson G.A. & Schulz A. (1999) Long-distance transport of macromolecules. Trends in Plant Science 4, 354360.
  • Thorsch J. & Esau K. (1981a) Changes in the endoplasmic reticulum during differentiation of a sieve element in Gossypium hirsutum. Journal of Ultrastructural Research 74, 183194.
  • Thorsch J. & Esau K. (1981b) Nuclear degeneration and the association of endoplasmic reticulum with the nuclear envelope and microtubules in maturing sieve elements of Gossypium hirsutum. Journal of Ultrastructural Research 74, 195204.
  • Truernit E. & Sauer N. (1995) The promoter of the Arabidopsis thaliana SUC2 sucrose-H+ symporter gene directs expression of β-glucuronidase to the phloem: evidence for phloem loading by SUC2. Planta 196, 564570.
  • Truernit E., Schmid J., Epple P., Illig J. & Sauer N. (1996) The sink-specific and stress-regulated Arabidopsis STP4 gene: enhanced expression of a gene encoding a monosaccharide transporter by wounding, elicitors, and pathogen challenge. Plant Cell 8, 21692182.
  • Turgeon R. (1991) Symplastic phloem loading and the sink-source transition in leaves: A model. In Recent Advances in Phloem Transport and Assimilate Compartmentation (eds J.-L.Bonnemain, S.Delrot, W.J.Lucas & J.Dainty), pp. 1822. Ouest Editions, Nantes, France.
  • Turgeon R. (1996) Phloem loading and plasmodesmata. Trends in Plant Science 1, 418423.
  • Turgeon R. & Hepler P.K. (1989) Symplastic continuity between mesophyll and companion cells in the minor veins of Cucurbita pepo leaves. Planta 179, 2431.
  • Turgeon R. & Medville R. (1998) The absence of phloem loading in willow leaves. Proceedings of the National Academy of Sciences USA 95, 1205512060.
  • Turgeon R. & Wimmers L.E. (1988) Different patterns of vein loading of exogenous [14C]-sucrose in leaves of Pisum sativum and Coleus blumei. Plant Physiology 87, 179182.
  • Turgeon R., Medville R. & Nixon K.C. (2001) The evolution of minor vein phloem and phloem loading. American Journal of Botany 88, 13311339.
  • Tyerman S.D., Bohnert H.J., Maurel C., Steudle E. & Smith J.A.C. (1999) Plant aquaporins: their molecular biology, biophysics and significance for plant water relations. Journal of Experimental Botany 50, 10551071.
  • Voinnet O., Vain P., Angell S. & Baulcombe D.C. (1998) Systemic spread of sequence-specific transgene RNA degradation in plants is initiated by localized intoduction of ectopic promoterless DNA. Cell 95, 177187.
  • Volk G. & Franceschi V.R. (2000) Localization of a calcium-channel-like protein sieve element plasma membrane. Australian Journal of Plant Physiology 27, 779786.
  • Vreugdenhil D. & Koot-Gronsveld E.A.M. (1989) Measurements of pH, sucrose and potassium ions in the phloem of castor bean (Ricinus communis) plants. Physiologia Plantarum 77, 385388.
  • Wang Y.Q. & Kollmann R. (1996) Vascular differentiation in the graft union of in vitro grafts with different compatibility. Structural and functional aspects. Journal of Plant Physiology 147, 521533.
  • Warmbrodt R.D. (1985) Studies on the root of Hordeum vulgare L. – Ultrastructure of the seminal root with special reference to the phloem. American Journal of Botany 72, 414432.
  • Warmbrodt R.D. (1986) Structural aspects of the primary tissues of the Cucurbita pepo L. root with special reference to the phloem. New Phytologist 102, 175192.
  • Webster D.H. & Currier H.B. (1965) Callose: lateral movement of assimilates from phloem. Science 150, 16101611.
  • Weise A., Barker L., Kühn C., Lalonde S., Buschmann H., Frommer W.B. & Ward J.M. (2000) A new subfamily of sucrose transporters, SUT4, with low affinity/high capacity localized in enucleate sieve elements of plants. Plant Cell 12, 13451355.
  • Wergin W.P., Palevitz B.A. & Newcomb E.H. (1975) Structure and development of P-protein in phloem parenchyma and companion cells of legumes. Tissue and Cell 7, 227242.
  • Wright J.P. & Fisher D.B. (1981) Measurement of the sieve tube membrane potential. Plant Physiology 67, 845848.
  • Xoconostle-Cazares B., Xiang Y., Ruiz-Medrano R., Wang H.-L., Monzer J., Yoo B.-C., McFarland K.C., Franceschi V.R. & Lucas W.J. (1999) Plant paralog to viral movement protein potentiates transport of mRNA into the phloem. Science 283, 9498.
  • Zahur M.S. (1959) Comparative Study of the Secondary Phloem of 423 Species of Woody Dicotyledons Belonging to 85 Families. Cornell University Agricultural Station Memoir 358.
  • Zhao R., Dielen V., Kinet J.-M. & Boutry M. (2000) Cosuppression of a plasma membrane H+-ATPase isoform impairs sucrose translocation, stomatal opening, plant growth, and male fertility. Plant Cell 12, 535546.
  • Ziegler H. (1975) Nature of transported substances I. In Phloem Transport. Encyclopedia of Plant Physiology (eds M.H.Zimmermann & J.A.Milburn), pp. 59100. Springer, Berlin, Germany.
  • Zimmermann M.H. & Ziegler H. (1975) List of sugars and sugar alcohols in sieve-tube exudates. In Encyclopedia of Plant Physiology (eds M.H.Zimmermann & J.A. Milburn), pp. 480503. Springer, Berlin, Germany.