Plant, Cell & Environment

Cover image for Vol. 39 Issue 10

Early View (Online Version of Record published before inclusion in an issue)

Edited By: Keith Mott

Impact Factor: 6.169

ISI Journal Citation Reports © Ranking: 2015: 10/209 (Plant Sciences)

Online ISSN: 1365-3040

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  1. 1 - 38
  1. Original Articles

    1. Carbon source–sink limitations differ between two species with contrasting growth strategies

      Angela C. Burnett, Alistair Rogers, Mark Rees and Colin P. Osborne

      Version of Record online: 22 SEP 2016 | DOI: 10.1111/pce.12801

      Understanding the limitation of plant growth by carbon source or sink capacity is critical for maximizing crop yield. Growth in a fast-growing domesticated annual barley species is carbon sink limited during vegetative development, whilst growth in a slow-growing wild perennial barley species is carbon source limited. Alleviating sink limitation during vegetative development could be important for maximizing the growth potential of elite cereal crops under future elevated CO2.

    2. Leaf vein fraction influences the Péclet effect and 18O enrichment in leaf water

      Meisha Holloway-Phillips, Lucas A. Cernusak, Margaret Barbour, Xin Song, Alexander Cheesman, Niels Munksgaard, Hilary Stuart-Williams and Graham D. Farquhar

      Version of Record online: 21 SEP 2016 | DOI: 10.1111/pce.12792

      The 18O enrichment of leaf water during transpiration is often less than that predicted for the sites of evaporation. The Péclet effect remains the most compelling explanation; however, evidence has been varied. We provide strong evidence for a Péclet effect within the xylem which, if unaccounted for, can lead to confounding of the estimated enrichment within the mesophyll water.

  2. Technical Reports

    1. Simple and robust methods for remote sensing of canopy chlorophyll content: a comparative analysis of hyperspectral data for different types of vegetation

      Yoshio Inoue, Martine Guérif, Frédéric Baret, Andrew Skidmore, Anatoly Gitelson, Martin Schlerf, Roshanak Darvishzadeh and Albert Olioso

      Version of Record online: 21 SEP 2016 | DOI: 10.1111/pce.12815

      Because the canopy chlorophyll content (CCC) is an essential ecophysiological variable for photosynthetic functioning, remote sensing of CCC is vital for a wide range of ecological and agricultural applications. Simple and robust algorithms were explored for spectral assessment of CCC using the diverse hyperspectral datasets for six vegetation types (rice, wheat, corn, soybean, sugar beet, natural grass) acquired in four locations (Japan, France, Italy, USA). A simple model using the ratio spectral index RSI(R815,R704) with the reflectance at 815 and 704 nm, proved to have the highest accuracy and applicability based on comprehensive analysis on the accuracy, linearity, sensitivity and applicability of various spectral models. The model would work as a robust algorithm for canopy-chlorophyll-metre and/or remote sensing of CCC in ecosystem and regional scales.

  3. Original Articles

    1. The genetic architecture of freezing tolerance varies across the range of Arabidopsis thaliana

      Matthew W. Horton, Glenda Willems, Eriko Sasaki, Maarten Koornneef and Magnus Nordborg

      Version of Record online: 21 SEP 2016 | DOI: 10.1111/pce.12812

      The ability to withstand freezing temperatures limits the geographical distribution of many plants, but the genes involved remain largely unknown. Here, we investigate the genetic bases of freezing tolerance in the model system, Arabidopsis thaliana. By using quantitative trait locus and genome-wide association studies and data from the 1001 Genomes Project, we identified several promising candidate genes. Our results suggest that the genetic architecture of freezing tolerance varies across the species range. Moreover, we found evidence that the climate variables that shape freezing tolerance also vary across the range, and that modelling climate variables with freezing tolerance may improve power in genome-wide association studies.

    2. Structural determinants of increased susceptibility to dehydration-induced cavitation in post-fire resprouting chaparral shrubs

      Anna L. Jacobsen, Michael F. Tobin, Hayden S. Toschi, Marta I. Percolla and R. Brandon Pratt

      Version of Record online: 21 SEP 2016 | DOI: 10.1111/pce.12802

      It is well established that transpiration and photosynthetic rates generally increase in resprouting plants after fire in chaparral shrublands, but little is known about how plant hydraulic function varies during this same recovery period. The ecophysiology of eight species of chaparral shrubs was compared between resprouting plants and adjacent unburned plants. Resprouting plants varied from unburned plants in their hydraulics, xylem structure and biomechanics. The observed shifts resulted in resprouting plants being more vulnerable to dehydration than unburned plants and demonstrate potential variability of plants in their hydraulic physiology depending on disturbance recovery state.

  4. Reviews

    1. Osmotic adjustment is a prime drought stress adaptive engine in support of plant production

      Abraham Blum

      Version of Record online: 20 SEP 2016 | DOI: 10.1111/pce.12800

      Osmotic adjustment has long been recognized as an important mechanism for adaptation to drought stress in native and in crop plants. During the late 1980s and early 2000s, contrarian views were published arguing that OA was not important for adaptation or that it was important only for survival but not for plant productivity. These views still resonate occasionally in the literature; therefore, this paper offers a critical review of evidence proving that OA support crop production under drought stress.

  5. Original Articles

    1. Deletion of FtsH11 protease has impact on chloroplast structure and function in Arabidopsis thaliana when grown under continuous light

      Raik Wagner, Lotta von Sydow, Harald Aigner, Sergiu Netotea, Sabine Brugière, Lars Sjögren, Myriam Ferro, Adrian Clarke and Christiane Funk

      Version of Record online: 19 SEP 2016 | DOI: 10.1111/pce.12808

      The membrane-integrated metalloprotease FtsH11 of Arabidopsis thaliana was found to be located exclusively in the chloroplast envelope and to be crucial for chloroplast structure and function during growth in prolonged photoperiod. Two chloroplast-located proteins of unknown function (Tic22-like protein and YGGT-A) showed significantly higher abundance in envelope membranes and intact chloroplasts of ftsH11 and therefore qualify as potential substrates for the FtsH11 protease.

  6. Reviews

    1. Aquaporins and plant transpiration

      Christophe Maurel, Lionel Verdoucq and Olivier Rodrigues

      Version of Record online: 19 SEP 2016 | DOI: 10.1111/pce.12814

      This review examines the relation between aquaporins and transpiration, two key components influencing plant water status. Aquaporins transport water and other molecules such as carbon dioxide and hydrogen peroxide during stomatal movements. The function of aquaporins in roots and shoots is also intimately linked to transpiration. Thus, aquaporins contribute to emerging cellular and long-distance signalling mechanisms which ultimately act on plant growth.

  7. Original Articles

    1. Function of Sitka spruce stone cells as a physical defence against white pine weevil

      Justin G. A. Whitehill, Hannah Henderson, Ward Strong, Barry Jaquish and Jörg Bohlmann

      Version of Record online: 19 SEP 2016 | DOI: 10.1111/pce.12810

      Stone cells are a major physical defence of conifers against stem feeding insects such as weevils and bark beetles; however, the mode of action by which stone cells interfere with insects is poorly understood. This paper evaluates the effects of stone cells on establishment of neonate weevil larvae, mandible wear and changes in relative growth rates of third instar larvae in an in vitro bioassay system. Stone cells appear to affect weevil larvae establishment by forming a physical barrier and displacement of nutrient rich tissue. Synergies between physical and chemical defences may provide a robust and durable defence for conifers, as insects must overcome the physical and nutritional impacts of stone cells while simultaneously avoid or detoxify chemical defences.

    2. Salinity tolerance is related to cyanide-resistant alternative respiration in Medicago truncatula under sudden severe stress

      Néstor Fernández Del-Saz, Igor Florez-Sarasa, María José Clemente-Moreno, Haytem Mhadhbi, Jaume Flexas, Alisdair R. Fernie and Miquel Ribas-Carbó

      Version of Record online: 16 SEP 2016 | DOI: 10.1111/pce.12776

    3. Anatomical variation of mesophyll conductance under potassium deficiency has a vital role in determining leaf photosynthesis

      Zhifeng Lu, Jianwei Lu, Yonghui Pan, Piaopiao Lu, Xiaokun Li, Rihuan Cong and Tao Ren

      Version of Record online: 13 SEP 2016 | DOI: 10.1111/pce.12795

      A one-dimensional model was applied to analyse anatomical basis of variation in mesophyll resistance in response to potassium (K) deficiency. K starvation decreased mesophyll conductance (gm) primarily because of the increase of liquid-phase resistance by decreasing the exposed surface area of chloroplasts per unit leaf area and enlarging the resistance of the cytoplasm. The enhancement of cytoplasmic resistance can be further interpreted by the enlarge distance of chloroplast from cell wall, and between adjacent chloroplasts. These results emphasize the role of K on the regulation of gm through anatomical variations.

    4. Effects of leaf water evaporative 2H-enrichment and biosynthetic fractionation on leaf wax n-alkane δ2H values in C3 and C4 grasses

      B. Gamarra, D. Sachse and A. Kahmen

      Version of Record online: 9 SEP 2016 | DOI: 10.1111/pce.12789

      We present novel and exciting data on how leaf wax n-alkane δ2H values from grasses are affected by plant physiological (leaf water evaporative 2H-enrichment) or biochemical processes (biosynthetic hydrogen isotope fractionation). These results are very interesting because they shed new light on how naturally observed differences between δ2H values from C3 and C4 grasses and dicots can be explained by systematic differences in the biosynthesis of n-alkanes between these plant group (i.e. largely driven by NADPH origins).

    5. Activation tagging in indica rice identifies ribosomal proteins as potential targets for manipulation of water-use efficiency and abiotic stress tolerance in plants

      Mazahar Moin, Achala Bakshi, Anusree Saha, M. Udaya Kumar, Attipalli R. Reddy, K. V. Rao, E. A. Siddiq and P. B. Kirti

      Version of Record online: 7 SEP 2016 | DOI: 10.1111/pce.12796

      This investigation is the first one to report on the development of the activation-tagged population in indica rice and screening the mutants for an agronomically important trait, water-use efficiency. It also reports on the tagging of ribosomal protein genes and their detailed expression profiling in response to various abiotic treatments, which revealed their possible role in abiotic stress amelioration along with WUE.

    6. A multilevel investigation to discover why Kandelia candel thrives in high salinity

      Lingxia Wang, Dezhuo Pan, Xiaojie Lv, Chi-Lien Cheng, Jian Li, Wenyu Liang, Jianhong Xing and Wei Chen

      Version of Record online: 7 SEP 2016 | DOI: 10.1111/pce.12804

      Little is known about salt-tolerance mechanisms in tree halophytes. In this study, systematic investigations at the levels of gene expression, enzyme activity and metabolite concentration based on preliminary RNA-Seq and proteomic analyses were conducted in Kandelia candel. The salt-tolerant characteristics discovered include the accumulation of phenylpropanoids and free amino acids, especially glutamate and γ-aminobutyric acid, but not proline.

  8. Reviews

    1. Biochemical basis of sulphenomics: how protein sulphenic acids may be stabilized by the protein microenvironment

      P. Trost, S. Fermani, M. Calvaresi and M. Zaffagnini

      Version of Record online: 7 SEP 2016 | DOI: 10.1111/pce.12791

      This review highlights the importance of acidity and nucleophilicity of protein cysteine thiols in determining the rate of H2O2-mediated primary oxidation to sulphenic acids. The stability and reactivity of sulphenic acids is also investigated, being strictly correlated to the cysteine microenvironment and dependent upon structural determinants, which are specific of each protein sensitive to oxidation. These findings reinforce the prominent role of cysteine sulphenic acids in redox signalling, but a combination of biochemical, structural and computational approaches is mandatory to get insight into the kinetic and thermodynamics factors controlling cysteine oxidation.

  9. Original Articles

    1. Variation of DNA methylation patterns associated with gene expression in rice (Oryza sativa) exposed to cadmium

      Sheng Jun Feng, Xue Song Liu, Hua Tao, Shang Kun Tan, Shan Shan Chu, Youko Oono, Xian Duo Zhang, Jian Chen and Zhi Min Yang

      Version of Record online: 7 SEP 2016 | DOI: 10.1111/pce.12793

      This study identified global differential DNA methylation marks associated with gene expression and functional consequences in rice exposed to Cd. Widespread differences were identified in CG and non-CG methylation marks between Cd-exposed and Cd-free rice genomes. A group of genes encoding metal transporters, Cd-detoxified proteins and metal-related transcription factors that were differentially methylated were found to regulate rice tolerance to Cd stress. Our data provide an insight into DNA methylation pattern associated with activation of specific genes responsible for Cd uptake, accumulation and detoxification.

    2. The drought response of potato reference cultivars with contrasting tolerance

      Heike Sprenger, Christina Kurowsky, Renate Horn, Alexander Erban, Sylvia Seddig, Katharina Rudack, Axel Fischer, Dirk Walther, Ellen Zuther, Karin Köhl, Dirk K. Hincha and Joachim Kopka

      Version of Record online: 6 SEP 2016 | DOI: 10.1111/pce.12780

      Four European potato cultivars (Solanum tuberosum L.) with contrasting drought tolerance were subjected to large-scale systems analysis at metabolome and transcriptome levels involving independent field and greenhouse trials with the aim to reveal agronomical relevant general and tolerance-associated drought responses. Integrative systems analyses reveal heat acclimation as a major component of the drought response and imply interaction of drought and pathogen tolerance.

    3. Interactions between temperature and intercellular CO2 concentration in controlling leaf isoprene emission rates

      Russell K. Monson, Amberly A. Neice, Nicole A. Trahan, Ian Shiach, Joel T. McCorkel and David J.P. Moore

      Version of Record online: 31 AUG 2016 | DOI: 10.1111/pce.12787

      Isoprene emissions from leaves are known to influence the oxidative capacity of the lower atmosphere and contribute to the formation of organic aerosol particles. Our research shows that isoprene emissions are inhibited by elevated atmospheric CO2 concentration, and that warmer leaf temperatures reduce the CO2 inhibition. The influence of warmer leaf temperatures is proposed to be because of modifications of the chloroplast inorganic phosphate balance and concomitant potential to import phosphoenolpyruvate into the chloroplast from the cytosol, which is required for isoprene biosynthesis.

  10. Reviews

    1. An ecophysiological and developmental perspective on variation in vessel diameter

      Uwe G. Hacke, Rachel Spicer, Stefan G. Schreiber and Lenka Plavcová

      Version of Record online: 9 AUG 2016 | DOI: 10.1111/pce.12777

      Variation in xylem vessel diameter impacts transport efficiency, vulnerability to freezing-induced embolism, and other aspects of plant biology. This review provides a synthesis of the ecophysiological implications of variation in lumen diameter together with a summary of our current understanding of vessel development and its endogenous regulation. Emphasis is placed on the presumed role of auxin at multiple developmental stages.

  11. Original Articles

    1. You have full text access to this OnlineOpen article
      Differential expression of microRNAs and potential targets under drought stress in barley

      Jannatul Ferdous, Juan Carlos Sanchez-Ferrero, Peter Langridge, Linda Milne, Jamil Chowdhury, Chris Brien and Penny J. Tricker

      Version of Record online: 4 AUG 2016 | DOI: 10.1111/pce.12764

      A role for microRNAs in regulating gene responses to abiotic stress has been well established but translating this information to practical crop improvement has proved difficult, because we have had little knowledge about genotypic stress-induced variation in expression of miRNAs and their targets. MicroRNA/gene target interaction is usually predicted from bioinformatic analysis of small RNA and degradome sequencing data. Of 11 predicted, drought-regulated microRNAs we were able to show inverse correlation of only two microRNA/ target pairs under drought, and this was genotype dependent. Our results show genotypic variation in miRNA expression and provide evidence of drought-responsive regulation of important microRNA target genes.

  12. Commentaries

    1. Xylem refilling – a question of sugar transporters and pH?

      Uwe G. Hacke and Joan Laur

      Version of Record online: 25 JUL 2016 | DOI: 10.1111/pce.12784

  13. Original Articles

    1. Plumbing the depths: extracellular water storage in specialized leaf structures and its functional expression in a three-domain pressure –volume relationship

      Hoa T. Nguyen, Patrick Meir, Joe Wolfe, Maurizio Mencuccini and Marilyn C. Ball

      Version of Record online: 25 JUL 2016 | DOI: 10.1111/pce.12788

      The pressure-volume relationships in field grown leaves of the mangrove, Avicennia marina, exhibited three domains dominated successively by 1) the presence and consumption of extracellular water, 2) variable turgor and loss of intracellular water, and 3) osmotic behavior of flaccid cells and plasmolysis. Multiple sites of extracellular water storage were identified, including hollow trichomes and novel structures named “cisternae”. When fully charged, extracellular and cellular water storage could support a typical evaporation rate of 1 mmol m−2s−1 for 54 and 50 min, respectively, before turgor loss was reached. This study emphasizes the importance of leaf anatomy for the interpretation of PV curves, and identifies extracellular water storage sites that enable transient water use without substantive turgor loss when other factors, such as high soil salinity, constrain rates of water transport.

    2. You have full text access to this OnlineOpen article
      Nitric oxide-fixation by non-symbiotic haemoglobin proteins in Arabidopsis thaliana under N-limited conditions

      Gitto Thomas Kuruthukulangarakoola, Jiangli Zhang, Andreas Albert, Barbro Winkler, Hans Lang, Franz Buegger, Frank Gaupels, Werner Heller, Bernhard Michalke, Hakan Sarioglu, Jörg-Peter Schnitzler, Kim Henrik Hebelstrup, Jörg Durner and Christian Lindermayr

      Version of Record online: 25 JUL 2016 | DOI: 10.1111/pce.12773

      This study reports about a NO-fixing mechanism in Arabidopsis, which allows the fixation of atmospheric NO into nitrogen metabolism. Non-symbiotic haemoglobin class 1 and class 2 were identified as key proteins of the NO-fixation pathway converting NO to nitrate, which is further introduced into the N-metabolism. This mechanism is probably important under conditions with limited N supply via the soil. Moreover, the plant-based NO uptake lowers the concentration of insanitary atmospheric NOx, and in this context, NO-fixation can be beneficial to air quality.

    3. Diacylglycerol kinases activate tobacco NADPH oxidase-dependent oxidative burst in response to cryptogein

      Jean-Luc Cacas, Patricia Gerbeau-Pissot, Jérôme Fromentin, Catherine Cantrel, Dominique Thomas, Emmanuelle Jeannette, Tetiana Kalachova, Sébastien Mongrand, Françoise Simon-Plas and Eric Ruelland

      Version of Record online: 20 JUL 2016 | DOI: 10.1111/pce.12771

      Cryptogein is a protein secreted by the oomycete Phytophthora cryptogea that activates defence mechanisms in tobacco. We show here in BY-2 tobacco suspension cells that phosphatidic acid rapidly accumulates in response to cryptogein because of the coordinated onset of phosphoinositide-dependent phospholipase C and diacylglycerol kinase activities. Both enzyme specific inhibitors and silencing of the phylogenetic cluster III of the tobacco DGK family were found to reduce PA production upon elicitation and to strongly decrease the RBOHD-mediated oxidative burst. This establishes that phosphatidic acid production by diacylglycerol kinases is upstream of the oxidative burst in response to cryptogein.

    4. You have full text access to this OnlineOpen article
      The carbon bonus of organic nitrogen enhances nitrogen use efficiency of plants

      Oskar Franklin, Camila Aguetoni Cambui, Linda Gruffman, Sari Palmroth, Ram Oren and Torgny Näsholm

      Version of Record online: 29 JUN 2016 | DOI: 10.1111/pce.12772

    5. Volatile compounds emitted by diverse phytopathogenic microorganisms promote plant growth and flowering through cytokinin action

      Ángela María Sánchez-López, Marouane Baslam, Nuria De Diego, Francisco José Muñoz, Abdellatif Bahaji, Goizeder Almagro, Adriana Ricarte-Bermejo, Pablo García-Gómez, Jun Li, Jan F. Humplík, Ondřej Novák, Lukáš Spíchal, Karel Doležal, Edurne Baroja-Fernández and Javier Pozueta-Romero

      Version of Record online: 16 JUN 2016 | DOI: 10.1111/pce.12759

      It is known that volatile emissions from some beneficial rhizosphere microorganisms promote plant growth. Here we show that volatile compounds (VCs) emitted by phylogenetically diverse rhizosphere and non-rhizhosphere bacteria and fungi (including plant pathogens and microbes that do not normally interact mutualistically with plants) promote growth and flowering of various plant species, including crops. Transcriptomic analyses revealed that many genes differentially expressed in Arabidopsis plants treated with VCs emitted by the fungal phytopathogen Alternaria alternata were also differentially expressed in plants exposed to VCs emitted by the plant growth promoting rhizobacterium Bacillus subtilis GB03, suggesting that plants react to microbial VCs through highly conserved regulatory mechanisms. The discovery that VCs from pathogenic microorganisms can have beneficial effects on plant growth and development extends knowledge of the diversity and complexity of the interactions involved in modulation of plant physiology, raising questions regarding the evolution of the processes, their ecological significance and potential applications.

    6. Shoot tolerance mechanisms to iron toxicity in rice (Oryza sativa L.)

      Lin-Bo Wu, Yoshiaki Ueda, Shang-Kun Lai and Michael Frei

      Version of Record online: 12 MAY 2016 | DOI: 10.1111/pce.12733

    7. The Arabidopsis trichome is an active mechanosensory switch

      Li Hong Zhou, Shao Bao Liu, Peng Fei Wang, Tian Jian Lu, Feng Xu, Guy M. Genin and Barbara G. Pickard

      Version of Record online: 4 MAY 2016 | DOI: 10.1111/pce.12728

      The trichome is a sensor enabling Arabidopsis (and probably its agricultural relatives) to detect forces on the order of the weights that insects apply. When a trichome is bent or brushed, the unique tapering of its wall facilitates basal force transmission and focusing on a pliant zone, which consequently buckles. Force impinging on a surrounding skirt of cells is transduced to a chemical signal, evidenced as oscillation of cytosolic Ca2+. Elevation of apoplastic skirt cell pH is another indicator that the trichome has switched on chemical activity.

  14. Special Issues

    1. The redox control of photorespiration: from biochemical and physiological aspects to biotechnological considerations

      Olivier Keech, Per Gardeström, Leszek A. Kleczkowski and Nicolas Rouhier

      Version of Record online: 21 APR 2016 | DOI: 10.1111/pce.12713

      This review discusses known and potential redox regulation mechanisms that might affect the photorespiratory enzymes as well as the peripheral enzymes associated to photorespiration. The reported post-translational modifications of key cysteine residues in these enzymes add another layer of complexity for their regulation, which has to be taken into account for any biotechnological strategies aiming at minimizing growth losses associated with photorespiration.

  15. Original Articles

    1. WD40-REPEAT 5a functions in drought stress tolerance by regulating nitric oxide accumulation in Arabidopsis

      Wen-Cheng Liu, Yun-Hui Li, Hong-Mei Yuan, Bing-Lei Zhang, Shuang Zhai and Ying-Tang Lu

      Version of Record online: 18 APR 2016 | DOI: 10.1111/pce.12723

    2. Polyamine oxidase 5 loss-of-function mutations in Arabidopsis thaliana trigger metabolic and transcriptional reprogramming and promote salt stress tolerance

      Xavier Zarza, Kostadin E. Atanasov, Francisco Marco, Vicent Arbona, Pedro Carrasco, Joachim Kopka, Vasileios Fotopoulos, Teun Munnik, Aurelio Gómez-Cadenas, Antonio F. Tiburcio and Rubén Alcázar

      Version of Record online: 13 APR 2016 | DOI: 10.1111/pce.12714

      Arabidopsis atpao5 loss-of-function mutants exhibit constitutive accumulation of thermospermine (tSpm) that associates with enhanced salt tolerance. tSpm triggers transcriptional and metabolic changes that involve promotion of ABA and JA pathways, accumulation of TCA cycle intermediates, compatible solutes along with other effects that additively contribute to salt tolerance. We provide evidence for the involvement of tSpm in plant abiotic stress tolerance.

  16. Reviews

  17. Special Issues

    1. NADPH oxidases differentially regulate ROS metabolism and nutrient uptake under cadmium toxicity

      D. K. Gupta, L. B. Pena, M. C. Romero-Puertas, A. Hernández, M. Inouhe and L. M. Sandalio

      Version of Record online: 1 APR 2016 | DOI: 10.1111/pce.12711

      Under cadmium stress, respiratory burst oxydase homologs (RBOHs) differentially regulate H2O2 production, with RBOHC being the most important source of reactive oxygen species; anti-oxidative defences are also differentially regulated, with superoxide dismutase regulation by RBOHC, as well as the regulation of redox-couple GSH/GSSG ratio by RBOHC and D and the ASA/DHA by RBOHF being the most important factors. Our results also suggest that RBOHs can play an important role in regulating the root-to-shoot nutrient transport and are important players in the nutrient regulatory hub and, for instance, can be of potential interest in biotechnology to protect shoot from heavy metals.

  18. Special Issue

    1. Nitric oxide function in plant abiotic stress

      Nurun Nahar Fancy, Ann-Kathrin Bahlmann and Gary J. Loake

      Version of Record online: 1 MAR 2016 | DOI: 10.1111/pce.12707

      In this manuscript, we focus on the current state-of-the-art regarding the role of nitric oxide (NO) and S-nitrosylation during abiotic stress responses in plants. This is significant because NO and S-nitrosylation are emerging as important players in plant abiotic stress signalling. The paper should be of interest to readers in the areas of plant abiotic stress, signalling, redox regulation, NO function and S-nitrosylation.

    2. Functional characterization of the chaperon-like protein Cdc48 in cryptogein-induced immune response in tobacco

      Claire Rosnoblet, Hervé Bègue, Cécile Blanchard, Carole Pichereaux, Angélique Besson-Bard, Sébastien Aimé and David Wendehenne

      Version of Record online: 18 JAN 2016 | DOI: 10.1111/pce.12686

      In a previous study, we demonstrated that the chaperone-like protein NtCdc48 is regulated by S-nitrosylation in tobacco cells undergoing an immune response triggered by cryptogein, an elicitin produced by the oomycete Phytophthora cryptogea. In the present original study, we further investigated the function of this chaperone in cryptogein signalling and cryptogein-triggered hypersensitive-like cell death. We reported that only a small proportion of the overall NtCdc48 protein population undergoes S-nitrosylation. However, using different strategies such as gel filtration in native conditions, immunoprecipitation and the generation of a tobacco cell line overexpressing NtCdc48, we demonstrated that this protein is mobilized in response to cryptogein, is present as a hexameric and active complex and interacts with numerous partners related to proteasome-dependent degradation, subcellular trafficking and redox regulation. Importantly, our study highlighted a role for NtCdc48 in cryptogein-triggered cell death. Altogether, this investigation designs NtCdc48 as a new component of plant immunity.

  19. Reviews

    1. The nitrogen–potassium intersection: membranes, metabolism, and mechanism

      Devrim Coskun, Dev T. Britto and Herbert J. Kronzucker

      Version of Record online: 18 JAN 2016 | DOI: 10.1111/pce.12671

      This review summarizes fundamental intersections between the pathways of inorganic nitrogen (NH4+ and NO3) and potassium (K+) acquisition in plants. Uptake, storage, translocation and metabolism are discussed at levels of organization ranging from molecular-genetic processes to whole-plant physiology. The regulation and optimization of plant growth, yield, metabolism and water-use efficiency are discussed in this nutritional context.

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