Drought Stress Responses and Resistance in Plants: From Cellular Responses to Long-Distance Intercellular Communication

Takahashi, Fumiyuki; Kuromori, Takashi; Urano, Kaoru; Yamaguchi‐Shinozaki, Kazuko; Shinozaki, Kazuo

doi:10.3389/fpls.2020.556972

Cited by 238 publications

(178 citation statements)

References 134 publications

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“…Alternatively, secreted peptide hormones such as PSY1, CEPs, CLV3, CLEs, CLE-PS2, and RGFs, which undergo posttranslational hydroxylation (Lee et al, 2020), might be involved in hypoxic response and regulate transcriptional responses through TFs. Among them, CLE and CEP peptides were shown to be associated with abiotic stress such as osmotic and drought tolerance in Arabidopsis (Smith et al, 2020;Takahashi et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

An Arabidopsis Prolyl 4 Hydroxylase Is Involved in the Low Oxygen Response

et al. 2021

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Plant responses to flooding, submergence and waterlogging are important for adaptation to climate change environments. Therefore, the characterization of the molecular mechanisms activated under hypoxic and anoxic conditions might lead to low oxygen resilient crops. Although in mammalian systems prolyl 4 hydroxylases (P4Hs) are involved in the oxygen sensing pathway, their role in plants under low oxygen has not been extensively investigated. In this report, an Arabidopsis AtP4H3 T-DNA knock out mutant line showed higher sensitivity to anoxic treatment possibly due to lower induction of the fermentation pathway genes, ADH and PDC1, and of sucrose synthases, SUS1 and SUS4. This sensitivity to anoxia was accompanied by lower protein levels of AGPs-bound epitopes such as LM14 in the mutant line and induction of extensins-bound epitopes, while the expression levels of the majority of the AGPs genes were stable throughout a low oxygen time course. The lower AGPs content might be related to altered frequency of proline hydroxylation occurrence in the p4h3 line. These results indicate active involvement of proline hydroxylation, a post-translational modification, to low oxygen response in Arabidopsis.

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Section: Discussionmentioning

confidence: 99%

An Arabidopsis Prolyl 4 Hydroxylase Is Involved in the Low Oxygen Response

et al. 2021

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“…The elevated levels of ABA in our transgenic plants could be the reason for the high expression of genes for cell wall maintenance and biosynthesis. Cell wall related remodelling and ABA regulated signalling are the primary response against abiotic stress including drought 51–53 . ABA dependent increased expression of CYP s and DREBP have been reported earlier in plants with their role implicated in drought stress 50,54,55 .…”

Section: Discussionmentioning

confidence: 99%

Wheat inositol pyrophosphate kinase TaVIH2-3B modulates cell-wall composition for drought tolerance in Arabidopsis

Shukla

Kaur

Kanwar

et al. 2019

Preprint

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Inositol pyrophosphates (PPx□InsPs) are of key interest, since they are known to participate in multiple physiological processes from lower eukaryotes to humans. However, limited knowledge is available for their role in plants and especially in crops. In this study, two diphosphoinositol pentakisphosphate kinase PPIP5K wheat homologs, TaVIH1 and TaVIH2 were identified and characterized for their spatio-temporal expression along with their physiological functions. The biochemical assay demonstrated the presence of active VIH-kinase domains as evident from the InsP6 phosphorylation activity. The yeast complementation assays showed differential function, where only TaVIH2-3B was capable of rescuing the growth defects of yeast vip1Δ genotype. Reporter assays with TaVIH2-promoter in Arabidopsis displayed strong GUS expression in response to dehydration stress and Pi-starvation with similar observations noted at the transcriptional level. In an attempt to identify VIH2 function, a yeast two hybrid screen of wheat library resulted in the identification of multiple interacting proteins primarily associated with cell-wall. One such interactor of wheat VIH2-3B was identified to be a Fasciclin-like arabinogalactan protein (FLA6) that was confirmed by pull-down assay. Systematic analysis of transgenic Arabidopsis overexpressing TaVIH2-3B protein showed robust growth and enhanced relative water content when compared to controls. Biochemical analysis of their cell-wall components in the shoots resulted in increased accumulation of polysaccharides such as cellulose, arabinogalactan and arabinoxylan, whereas Atvih2-3 mutant showed decrease in some of these components. Overall, our results provide novel insight into the functional role of inositol pyrophosphate kinases that modulate cell-wall components so as to provide tolerance towards the dehydration stress.

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“…This “switch” is, however, heavily dependent on a variety of factors. Generally, a stress is sensed, and that information is relayed by phytohormones [ 98 ]. In the case of drought, abscisic acid (ABA), has been revealed as a major phytohormone to activate drought resistance [ 99 ].…”

Section: Reinforcement Intersection Of the Ups With Aba In Abioticmentioning

confidence: 99%

The Ubiquitin Switch in Plant Stress Response

Doroodian

Hua

2021

Plants

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Ubiquitin is a 76 amino acid polypeptide common to all eukaryotic organisms. It functions as a post-translationally modifying mark covalently linked to a large cohort of yet poorly defined protein substrates. The resulting ubiquitylated proteins can rapidly change their activities, cellular localization, or turnover through the 26S proteasome if they are no longer needed or are abnormal. Such a selective modification is essential to many signal transduction pathways particularly in those related to stress responses by rapidly enhancing or quenching output. Hence, this modification system, the so-called ubiquitin-26S proteasome system (UPS), has caught the attention in the plant research community over the last two decades for its roles in plant abiotic and biotic stress responses. Through direct or indirect mediation of plant hormones, the UPS selectively degrades key components in stress signaling to either negatively or positively regulate plant response to a given stimulus. As a result, a tightly regulated signaling network has become of much interest over the years. The ever-increasing changes of the global climate require both the development of new crops to cope with rapid changing environment and new knowledge to survey the dynamics of ecosystem. This review examines how the ubiquitin can switch and tune plant stress response and poses potential avenues to further explore this system.

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Drought Stress Responses and Resistance in Plants: From Cellular Responses to Long-Distance Intercellular Communication

Cited by 238 publications

References 134 publications

An Arabidopsis Prolyl 4 Hydroxylase Is Involved in the Low Oxygen Response

An Arabidopsis Prolyl 4 Hydroxylase Is Involved in the Low Oxygen Response

Wheat inositol pyrophosphate kinase TaVIH2-3B modulates cell-wall composition for drought tolerance in Arabidopsis

The Ubiquitin Switch in Plant Stress Response

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