Adaptations of higher plant cell walls to water loss: drought vs desiccation

Moore, John P.; Vicré-Gibouin, Maïté; Farrant, Jill M.; Driouich, Azeddine

doi:10.1111/j.1399-3054.2008.01134.x

Cited by 218 publications

(210 citation statements)

References 51 publications

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“…Cell wall modification genes that are usually repressed by drought (Moore et al, 2008) are also repressed at the seedling stage but specifically up-regulated in the reproductive stage. Comparisons of the GO BP category revealed the most obvious differences between up-and down-regulated genes (Supplemental Table S4).…”

Section: Cc-by-nc-ndmentioning

confidence: 99%

RECoN: Rice Environment Coexpression Network for Systems Level Analysis of Abiotic-Stress Response

Krishnan

Gupta

Ambavaram

et al. 2017

Preprint

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Author ContributionsAK, designed the network, conducted statistical analysis, drafted the manuscript; CG, contributed text, updated figures, and created the webserver; MA, conducted rice drought and gene expression experiments; AP, designed experiments and coordinated research; all authors contributed to writing the manuscript. AbstractTranscriptional profiling is a prevalent and powerful approach for capturing the response of crop plants to environmental stresses, e.g. response of rice to drought. However, functionally . CC-BY-NC-ND 4.0 International license It is made available under a was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.The copyright holder for this preprint (which . http://dx.doi.org/10.1101/166694 doi: bioRxiv preprint first posted online 2 interpreting the resulting genome-wide gene expression changes is severely hampered by the large gaps in our genomic knowledge about which genes work together in cellular pathways/processes in rice. Here, we present a new web resource -RECoN -that relies on a network-based approach to go beyond currently limited annotations in delineating functional and regulatory perturbations in new rice stress transcriptome datasets generated by a researcher. To build RECoN, we first enumerated 1,744 stress-specific gene modules covering 28,421 rice genes (>72% of the genes in the genome). Each module contains a group of genes tightly coexpressed across a large number of environmental conditions and, thus, is likely to be functionally coherent. When a user provides a new differential expression profile, RECoN identifies modules substantially perturbed in their experiment and further suggests deregulated functional and regulatory mechanisms based on the enrichment of current annotations within the predefined modules. We demonstrate the utility of this resource by analyzing new drought transcriptomes of rice in three developmental stages, which revealed large-scale insights into the cellular processes and regulatory mechanisms involved in common and stage-specific drought responses. RECoN enables biologists to functionally explore new data from all abiotic stresses on a genome-scale and to uncover gene candidates, including those that are currently functionally uncharacterized, for engineering stress tolerance.

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Section: Cc-by-nc-ndmentioning

confidence: 99%

RECoN: Rice Environment Coexpression Network for Systems Level Analysis of Abiotic-Stress Response

Krishnan

Gupta

Ambavaram

et al. 2017

Preprint

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“…cell walls. Moore et al (2008) suggested that arabinans can be especially important to the mobility or "plasticizing" of pectins during water stress. Thus, the spectral shift toward a higher t range in T7.2 might reflect a decrease in wall hydration, and thus in pectin mobility, when its arabinan content is reduced.…”

Section: Rheological Changes In Tissues With Modified Wall Polymersmentioning

confidence: 99%

Mechanical Properties of Plant Cell Walls Probed by Relaxation Spectra

et al. 2010

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Transformants and mutants with altered cell wall composition are expected to display a biomechanical phenotype due to the structural role of the cell wall. It is often quite difficult, however, to distinguish the mechanical behavior of a mutant's or transformant's cell walls from that of the wild type. This may be due to the plant's ability to compensate for the wall modification or because the biophysical method that is often employed, determination of simple elastic modulus and breakstrength, lacks the resolving power necessary for detecting subtle mechanical phenotypes. Here, we apply a method, determination of relaxation spectra, which probes, and can separate, the viscoelastic properties of different cell wall components (i.e. those properties that depend on the elastic behavior of load-bearing wall polymers combined with viscous interactions between them). A computer program, BayesRelax, that deduces relaxation spectra from appropriate rheological measurements is presented and made accessible through a Web interface. BayesRelax models the cell wall as a continuum of relaxing elements, and the ability of the method to resolve small differences in cell wall mechanical properties is demonstrated using tuber tissue from wild-type and transgenic potatoes (Solanum tuberosum) that differ in rhamnogalacturonan I side chain structure.

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“…Under water deficit the loss of water in the apoplast will result in a collapse of wall structure, and consequently reduction of wall porosity and polymer adhesion or cross-linking ( Fig. 4; Moore et al 2008b;Yang et al 2011c).…”

Section: Cell-wall Porositymentioning

confidence: 99%

“…Loss of water from the CW matrix can bring the polymers into close proximity to each other, and thus cause polymer adhesion or cross-linking under water deficit (Moore et al 2008b). Several CW-modifying proteins such as expansins, xyloglucan endotransglucosylase/hydrolases (XTHs), endoglucanases and pectin methylesterases (PMEs) play key roles in the modification of CW structure and thus porosity (recently reviewed by Sasidharan et al 2011).…”

Section: Cell-wall Porositymentioning

confidence: 99%

Interaction of aluminium and drought stress on root growth and crop yield on acid soils

2013

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Background Aluminium (Al) toxicity and drought stress are two major constraints for crop production in the world, particularly in the tropics. The variation in rainfall distribution and longer dry spells in much of the tropics during the main growing period of crops are becoming increasingly important yield-limiting factors with the global climate change. As a result, crop genotypes that are tolerant of both drought and Al toxicity need to be developed. Scope The present review mainly focuses on the interaction of Al and drought on root development, crop growth and yield on acid soils. It summarizes evidence from our own studies and other published/related work, and provides novel insights into the breeding for the adaptation to these combined abiotic stresses. The primary symptom of Al phytotoxicity is the inhibition of root growth. The impeded root system will restrict the roots for exploring the acid subsoil to absorb water and nutrients which is particularly important under condition of low soil moisture in the surface soil under drought. Whereas drought primarily affects shoot growth, effects of phytotoxic Al on shoot growth are mostly secondary effects that are induced by Al affecting root growth and function, while under drought stress root growth may even be promoted. Much progress has recently been made in the understanding of the physiology and molecular biology of the interaction between Al toxicity and drought stress in common bean (Phaseolus vulgaris L.) in hydroponics and in an Al-toxic soil. Conclusions Crops growing on acid soils yield less than their potential because of the poorly developed root system that limits nutrient and water uptake. Breeding for drought resistance must be combined with Al resistance, to assure that drought resistance is expressed adequately in crops grown on soils with acid Al-toxic subsoils.

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Adaptations of higher plant cell walls to water loss: drought vs desiccation

Cited by 218 publications

References 51 publications

RECoN: Rice Environment Coexpression Network for Systems Level Analysis of Abiotic-Stress Response

RECoN: Rice Environment Coexpression Network for Systems Level Analysis of Abiotic-Stress Response

Mechanical Properties of Plant Cell Walls Probed by Relaxation Spectra

Interaction of aluminium and drought stress on root growth and crop yield on acid soils

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