Cytoskeleton-Plasma Membrane-Cell Wall Continuum in Plants. Emerging Links Revisited

Baluška, Frantǐsek; Šamaj, Jozef; Wojtaszek, Przemysław; Volkmann, Dieter; Menzel, Diedrik

doi:10.1104/pp.103.027250

Cited by 254 publications

(209 citation statements)

References 181 publications

(59 reference statements)

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“…Hence, the observed responses represent those of plant cells to damaged cell wall structure. It is thought that the plant cell wall exists as part of a continuum with the plasma membrane and cytoskeleton, and that there must be a mechanism by which these compartments interact functionally (Baluska et al 2003;Humphrey et al 2007). At present, the mechanism remains largely unknown.…”

Section: Discussionmentioning

confidence: 99%

Boron deprivation immediately causes cell death in growing roots ofArabidopsis thaliana(L.) Heynh.

Oiwa

Kitayama

Kobayashi

et al. 2013

Soil Science and Plant Nutrition

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Boron (B) is essential for the correct formation of cell wall structure because it is a component of borate-ester cross-links in pectin. Previously, we showed that removal of B from the culture medium immediately induced stress responses in suspension-cultured tobacco (Nicotiana tabacum L.) cells, but the mechanism by which cells exhibit such rapid responses remained unclear. In this study, we characterized the early responses of Arabidopsis thaliana (L.) Heynh. to B deprivation. Deprivation of B for 1 h caused cell death specifically in the root elongation zone. Reactive oxygen species accumulated in the same region, suggesting that the death was caused by oxidative damage. The B-deprivation treatment also induced the expressions of stress-responsive genes within 1 h. These results demonstrated that A. thaliana immediately senses and responds to the removal of B from the external medium. Similar responses were induced by calcium deprivation but not magnesium or potassium deprivation, suggesting that the failure of cross-linking in pectin molecules in growing cells triggers these rapid responses.

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Section: Discussionmentioning

confidence: 99%

Boron deprivation immediately causes cell death in growing roots ofArabidopsis thaliana(L.) Heynh.

Oiwa

Kitayama

Kobayashi

et al. 2013

Soil Science and Plant Nutrition

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“…The boxed areas marked with dotted lines represent the magnified gel sections, and the encircled areas are the representative unaltered spots used for the second normalization. The numbers correspond with the spot numbers mentioned in Table II. is one of the most characteristic features of cellular mechanics that allows cells to respond effectively to various extracellular signals (27). Several candidate components involved in signal transduction were identified in this study, for example, cytoplasmic kinase domain.…”

Section: Screening Of Chickpea Varieties For Dehydrationmentioning

confidence: 99%

Comparative Proteomics Analysis of Differentially Expressed Proteins in Chickpea Extracellular Matrix during Dehydration Stress

Bhushan

Pandey

Choudhary

et al. 2007

Molecular & Cellular Proteomics

194

193

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Water deficit or dehydration is the most crucial environmental factor that limits crop productivity and influences geographical distribution of many crop plants. It is suggested that dehydration-responsive changes in expression of proteins may lead to cellular adaptation against water deficit conditions. Most of the earlier understanding of dehydration-responsive cellular adaptation has evolved from transcriptome analyses. By contrast, comparative analysis of dehydration-responsive proteins, particularly proteins in the subcellular fraction, is limiting. In plants, cell wall or extracellular matrix (ECM) serves as the repository for most of the components of the cell signaling process and acts as a frontline defense. Thus, we have initiated a proteomics approach to identify dehydrationresponsive ECM proteins in a food legume, chickpea. Several commercial chickpea varieties were screened for the status of dehydration tolerance using different physiological and biochemical indexes. Dehydration-responsive temporal changes of ECM proteins in JG-62, a relatively tolerant variety, revealed 186 proteins with variance at a 95% significance level statistically. The comparative proteomics analysis led to the identification of 134 differentially expressed proteins that include predicted and novel dehydration-responsive proteins. This study, for the first time, demonstrates that over a hundred ECM proteins, presumably involved in a variety of cellular functions, viz. cell wall modification, signal transduction, metabolism, and cell defense and rescue, impinge on the molecular mechanism of dehydration tolerance in plants.

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“…Many hypotheses of how plants sense water loss center on detection of mechanical stimuli generated by loss of turgor and cell shrinkage. This includes changes in membrane shape or disruption of cell wall-cell membrane connections possibly detected by proteins, such as mechanosensitive channels or receptor-like kinases that bind cell wall components (4)(5)(6)(7)(8)(9). Proteins that induce or detect membrane curvature are known in mammalian cells (10) but have been little considered in plants.…”

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confidence: 99%

At14a-Like1 participates in membrane-associated mechanisms promoting growth during drought in Arabidopsis thaliana

Kumar

Hsieh

Verslues

2015

Proc. Natl. Acad. Sci. U.S.A.

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Limited knowledge of how plants regulate their growth and metabolism in response to drought and reduced soil water potential has impeded efforts to improve stress tolerance. Increased expression of the membrane-associated protein At14a-like1 (AFL1) led to increased growth and accumulation of the osmoprotective solute proline without negative effects on unstressed plants. Conversely, inducible RNA-interference suppression of AFL1 decreased growth and proline accumulation during low water potential while having no effect on unstressed plants. AFL1 overexpression lines had reduced expression of many stress-responsive genes, suggesting AFL1 may promote growth in part by suppression of negative regulatory genes. AFL1 interacted with the endomembrane proteins protein disulfide isomerase 5 (PDI5) and NAI2, with the PDI5 interaction being particularly increased by stress. PDI5 and NAI2 are negative regulatory factors, as pdi5, nai2, and pdi5-2nai2-3 mutants had increased growth and proline accumulation at low water potential. AFL1 also interacted with Adaptor protein2-2A (AP2-2A), which is part of a complex that recruits cargo proteins and promotes assembly of clathrin-coated vesicles. AFL1 colocalization with clathrin light chain along the plasma membrane, together with predictions of AFL1 structure, were consistent with a role in vesicle formation or trafficking. Fractionation experiments indicated that AFL1 is a peripheral membrane protein associated with both plasma membrane and endomembranes. These data identify classes of proteins (AFL1, PDI5, and NAI2) not previously known to be involved in drought signaling. AFL1-predicted structure, protein interactions, and localization all indicate its involvement in previously uncharacterized membrane-associated drought sensing or signaling mechanisms.E ven relatively mild drought that causes reduced soil water potential (ψ w ) can result in dramatically reduced plant growth and agricultural productivity. Physiological analyses have shown that plant growth is actively down-regulated during drought and is not limited by carbon supply (1-3). Reductions of growth help ensure survival by conserving water but can be undesirable for agriculture, as plant productivity is reduced more than need be if growth were less sensitive to changes in water status (3). Also, specific metabolic pathways, such as proline metabolism, are stress regulated and contribute to drought tolerance.The sensing and signaling mechanisms controlling growth and metabolic responses to drought remain unclear. Many hypotheses of how plants sense water loss center on detection of mechanical stimuli generated by loss of turgor and cell shrinkage. This includes changes in membrane shape or disruption of cell wall-cell membrane connections possibly detected by proteins, such as mechanosensitive channels or receptor-like kinases that bind cell wall components (4-9). Proteins that induce or detect membrane curvature are known in mammalian cells (10) but have been little considered in plants. Also, in analogy to mammal...

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Cytoskeleton-Plasma Membrane-Cell Wall Continuum in Plants. Emerging Links Revisited

Cited by 254 publications

References 181 publications

Boron deprivation immediately causes cell death in growing roots ofArabidopsis thaliana(L.) Heynh.

Boron deprivation immediately causes cell death in growing roots ofArabidopsis thaliana(L.) Heynh.

Comparative Proteomics Analysis of Differentially Expressed Proteins in Chickpea Extracellular Matrix during Dehydration Stress

At14a-Like1 participates in membrane-associated mechanisms promoting growth during drought in Arabidopsis thaliana

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