• Allen, M. F, Smith, W. K., Moore, T. S., Jr. & Christensen, M. (1981). Comparative water relations and photosynthesis of mycorrhizal am! non-mycorrhizal Bouteloua gracilis. New Phytologist 88, 683693.
  • Bell, R. H. V. (1970). The use of the herb layer by grassing ungulates in the Serengeti. In: Animal Populations in Relation to Their Food Resources (Ed. by A. Watson), pp. 111125. Blackwell, Oxford .
  • Björkman, E. (1942). Uber die Bedingungen der Mykorrhizabildung bei Kiefer and Fichte. Symbolae Botanicae Upsalienses 6, 1191.
  • Buwalda, J. G. & Hoh, K.M. (1982). Host fungus competition for carbon as a cause of growth depressions in vesicular arbuscular mycorrhizal ryegrass. Soil Biology and Biochemistry 14, 103106.
  • Cooper, K. M. (1975). Growth responses to the formation of endotrophic mycorrhizas in Solanum, Leptospermum and New Zealand ferns. In: Endomycorrhizas (Ed. by F. E. Sanders, B.Mosse & P. B.Tinker), pp. 391407. Academic Press, London .
  • Douds, D. D. Jr., Johnson, C. R. & Koch, K. E. (1988). Carbon cost of the fungal symbiont relative to net leaf P accumulation in a split-root VA mycorrhizal symbiosis. Plant Physiology 86, 491496.
  • Fares, Y., Demichble, D. W, Goeschi, J. D. & Baltuskonis, D. A. (1978). Continuously produced 11C for studies of photosynthesis, transport and metabolism. International Journal at Applied Radiation and Isotopes 29, 431441.
  • Fares, Y., Goeschl, J. D., Magnison, C. E., Scheld. H. W. & Strain, B. R. (1988). Tracer kinetics of plant carbon allocation with continuously produced 11CO. Journal of Rodioanalytical and Nuclear Chemistry 124, 103122.
  • Harris, D., Pacovsky, R. S. & Paul, B.A. (1985). Carbon economy of soybean rhizobium–Glomus associations. New Phytologist 101, 429440.
  • Koch, K. E. & Johnson, C. R. (1984). Photosynthate partitioning in split-root citrus seedlings with mycorrhizal and non-mycorrhizal root systems. Plant Physiology 75, 2630.
  • Kicky, R. M. N. & Paul K. A. (1982). Carbon How, photosynthesis, and N2, fixation in mycorrhizal and nodulated faba beans (Vicia faba L.). Soil Biology and Biochemistry 14, 407412.
  • Magnuson, C. E., Fares, Y., Goeschl, J. D., Nelson, C. H., Strain, B. R., Jaeger, C. H. & Bilpuch, E.C. (1982). An integrated tracer kinetics system for studying carbon uptake and allocation m plants using continuously produced 11CO2. Radiation and Environmental Biophysics 21, 5165.
  • Mcnaughton, S.J. (1976). Serengeti migratory wildebeest: facilitation of energy How by grazing. Science 191, 9294.
  • Mcnaughton, S. J. (1983). Serengeti grassland ecology-: The role of composite environmental factors and contingency in community organization. Ecological Monographs 53, 291320.
  • Mcnaughton, S. J. (1985). Ecology of a grazing ecosystem: the Serengeti. Ecological Monographs 55, 259294.
  • Minchin, P. E. H. & Thorpe, M. R. (1982). Evidence of a How of water into sieve tubes associated with phloem loading. Journal of Experimental Botany 133, 233240.
  • Pang, P. C. & Paul, E. A. (1980). Effects of vesicular arbuscular mycorrhizae on 11C and 15N distribution in nodulated faba beans. Canadian Journal of Soil Science 60, 241250.
  • Phillips, J. M. & Hayman, D. S. (1970). Improved procedures for clearing and staining parasitic and vesicular–arbuscular mycorrhizal fungi for rapid assessment of infection. Transactions of British Mycological Society 55, 158161.
  • Pirozynski, K. A. & Malloch, D. W. (1975). The origin of land plants: a matter of mycotropism. Biosystems 6, 153164.
  • Potvin, C, Goeschl, J. D. & Strain, B. R. (1984). Effects of temperature and CO2 enrichment on carbon translocation of plants of the C4 grass species Echinochloa crus-galli (L.) Beauv. from cool and warm environments. Plant Physiology 75, 10541057.
  • Potvin, C, Strain, B. R. & Goeschl, J. D. (1985). Low light temperature effect on photosynthate translocation of two C4 grasses. Oecologia 67, 305309.
  • Snellgrove, R. C, Splittstoesser, W. E., Stribley, D. P. & Tinker, B. P. (1982). The distribution of carbon and the demand of the fungal symbiont in leek plants with vesicular-arbuscular mycorrhizae. New Phytologist 92, 7587.
  • Tinker, P. B. (1978). Effects of vesicular arbuscular mycorrhizas on plant nutrition and plant growth. Physiologic Végétale 16, 741761.
  • Wallace, L. L. (1981). Growth, morphology and gas exchange of mycorrhizal and non-mycorhizal Panicum coloratum L., a C4 grass species, under different clipping and fertilization regimes. Oecologia 49, 272278.
  • Wallace, L. L., Mcnauchton, S. J. & Coughenour, M. B. (1982). The effects of clipping and fertilization on nitrogen nutrition and allocation by mycorrhizal and nonmycorrhizal Panicum coloratum L., a C4 grass. Oecologia 54, 6871.
  • Wardlaw, I. F. & Moncur, L. (1976). Source, sink and hormonal control of translocation in wheat. Planta 128, 93100.