Epigenomic plasticity of Arabidopsis<i>msh1</i>mutants under prolonged cold stress

Raju, Sunil Kumar Kenchanmane; Shao, Mon‐Ray; Wamboldt, Yashitola; Mackenzie, Sally A.

doi:10.1101/263780

Cited by 2 publications

(3 citation statements)

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“…In the plastid, depletion of MSH1 signals a systemic stress state in the plant, and msh1 mutant or RNAi suppression lines undergo dramatic changes in the expression of abiotic and biotic stress, circadian clock, phytohormone response and spliceosome pathways [83]. The msh1 mutant also displays a range in altered phenotype intensity, with delayed maturation and flowering, altered leaf morphology, daylength sensitivity [79] and enhanced tolerance to drought [55], heat [75], cold [77] and excess light [76]. These effects are accompanied by genome-wide cytosine methylation changes that reflect epigenomic reprogramming [56].…”

Section: The Protein Msh1 As a Component Of Organellar Stress Signalling And Plasticitymentioning

confidence: 99%

“…Nuclear response to sensory plastid perturbation includes genome-wide cytosine methylation repatterning and altered expression of integrated stress response networks. Transgenerational memory induced by MSH1 suppression gives rise, through crossing or grafting, to progeny with markedly enhanced growth vigour and resilience phenotypes [77,79,87,89]. WHY1 is localized to both mesophyll chloroplasts and sensory plastids [53], whereas WHY2 targets to mitochondria.…”

Section: (B) Cue1mentioning

confidence: 99%

“…These attributes presumably derive from its evolutionary origin.MSH1 protein is expressed in epidermal, vascular parenchyma, meristem and reproductive tissues, and the gene is responsive to environmental stress. Under conditions of heat, cold, drought and excess light, MSH1 steady-state transcript levels are markedly suppressed[55,[75][76][77], while conditions of plant growth on sucrose result in a sharp increase in MSH1 transcripts ([78]; J Yang, N Zhao and SA Mackenzie 2019 unpublished). This sugar effect appears royalsocietypublishing.org/journal/rstb Phil.…”

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Organellar protein multi-functionality and phenotypic plasticity in plants

Mackenzie

Kundariya

2019

Phil. Trans. R. Soc. B

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With the increasing impact of climate instability on agricultural and ecological systems has come a heightened sense of urgency to understand plant adaptation mechanisms in more detail. Plant species have a remarkable ability to disperse their progeny to a wide range of environments, demonstrating extraordinary resiliency mechanisms that incorporate epigenetics and transgenerational stability. Surprisingly, some of the underlying versatility of plants to adapt to abiotic and biotic stress emerges from the neofunctionalization of organelles and organellar proteins. We describe evidence of possible plastid specialization and multi-functional organellar protein features that serve to enhance plant phenotypic plasticity. These features appear to rely on, for example, spatio-temporal regulation of plastid composition, and unusual interorganellar protein targeting and retrograde signalling features that facilitate multi-functionalization. Although we report in detail on three such specializations, involving MSH1, WHIRLY1 and CUE1 proteins in Arabidopsis, there is ample reason to believe that these represent only a fraction of what is yet to be discovered as we begin to elaborate cross-species diversity. Recent observations suggest that plant proteins previously defined in one context may soon be rediscovered in new roles and that much more detailed investigation of proteins that show subcellular multi-targeting may be warranted.This article is part of the theme issue ‘Linking the mitochondrial genotype to phenotype: a complex endeavour’.

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Section: The Protein Msh1 As a Component Of Organellar Stress Signalling And Plasticitymentioning

confidence: 99%

Section: (B) Cue1mentioning

confidence: 99%

mentioning

confidence: 99%

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Organellar protein multi-functionality and phenotypic plasticity in plants

Mackenzie

Kundariya

2019

Phil. Trans. R. Soc. B

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Plant Responses to Abiotic Stresses and Rhizobacterial Biostimulants: Metabolomics and Epigenetics Perspectives

et al. 2021

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In response to abiotic stresses, plants mount comprehensive stress-specific responses which mediate signal transduction cascades, transcription of relevant responsive genes and the accumulation of numerous different stress-specific transcripts and metabolites, as well as coordinated stress-specific biochemical and physiological readjustments. These natural mechanisms employed by plants are however not always sufficient to ensure plant survival under abiotic stress conditions. Biostimulants such as plant growth-promoting rhizobacteria (PGPR) formulation are emerging as novel strategies for improving crop quality, yield and resilience against adverse environmental conditions. However, to successfully formulate these microbial-based biostimulants and design efficient application programs, the understanding of molecular and physiological mechanisms that govern biostimulant-plant interactions is imperatively required. Systems biology approaches, such as metabolomics, can unravel insights on the complex network of plant-PGPR interactions allowing for the identification of molecular targets responsible for improved growth and crop quality. Thus, this review highlights the current models on plant defence responses to abiotic stresses, from perception to the activation of cellular and molecular events. It further highlights the current knowledge on the application of microbial biostimulants and the use of epigenetics and metabolomics approaches to elucidate mechanisms of action of microbial biostimulants.

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Epigenomic plasticity of Arabidopsismsh1mutants under prolonged cold stress

Cited by 2 publications

References 52 publications

Organellar protein multi-functionality and phenotypic plasticity in plants

Organellar protein multi-functionality and phenotypic plasticity in plants

Plant Responses to Abiotic Stresses and Rhizobacterial Biostimulants: Metabolomics and Epigenetics Perspectives

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