Epigenetic control of plant senescence and linked processes
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TLDR
The review outlines the concept of epigenetic control of interconnected regulatory pathways steering stress responses and plant development and summarizes recent findings on global alterations in chromatin structure, histone and DNA modifications, and ATP-dependent chromatin remodelling during plant senescence and linked processes.Abstract:
Senescence processes are part of the plant developmental programme. They involve reprogramming of gene expression and are under the control of a complex regulatory network closely linked to other developmental and stressresponsive pathways. Recent evidence indicates that leaf senescence is regulated via epigenetic mechanisms. In the present review, the epigenetic control of plant senescence is discussed in the broader context of environmentsensitive plant development. The review outlines the concept of epigenetic control of interconnected regulatory pathways steering stress responses and plant development. Besides giving an overview of techniques used in the field, it summarizes recent findings on global alterations in chromatin structure, histone and DNA modifications, and ATPdependent chromatin remodelling during plant senescence and linked processes.read more
Citations
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Enhanced proteostasis, lipid remodeling, and nitrogen remobilization define barley flag leaf senescence.
Maja Cohen,Kendra Hertweck,Maxim Itkin,Sergey Malitsky,Bareket Dassa,Andreas Fischer,Robert Fluhr +6 more
TL;DR: This finding identifies processes and specific candidates which may affect nitrogen remobilization from senescing barley leaves, downstream of the HvNAM1 transcription factor.
Journal ArticleDOI
Integrated transcriptomics and miRNAomics provide insights into the complex multi-tiered regulatory networks associated with coleoptile senescence in rice
Jyothish Madambikattil Sasi,Cheeni VijayaKumar,Bharti Gupta V.K. Kukreja,Roli Budhwar,Rohit Nandan Shukla,Manu Agarwal,Surekha Katiyar-Agarwal +6 more
TL;DR: Comparison of gene expression and miRNA profiles generated for CS with publicly available leaf senescence datasets revealed that the two aging programs are remarkably distinct at molecular level in rice, demonstrating multi-tiered regulation of CS.
Assessment of stress-induced and developmentally-induced DNA methylation changes in barley (Hordeum vulgare L.)
TL;DR: This document summarizes current capabilities, research and operational priorities, and plans for further studies that were established at the 2015 USGS workshop on quantitative hazard assessments of earthquake-triggered landsliding and liquefaction in the Central American region.
Posted ContentDOI
Gene Expression Changes Occurring at Bolting Time are Associated with Leaf Senescence in Arabidopsis
Will E Hinckley,Judy A. Brusslan +1 more
TL;DR: This work hypothesized that gene expression changes associated with bolting time were regulating LS and used a mutant that displays both early bolting and early LS as a model to test this hypothesis and identified boltingTime-associated genes (BAGs) expressed in an older rosette leaf at the time of inflorescence emergence.
Journal ArticleDOI
Unravelling the Role of Epigenetic Modifications in Development and Reproduction of Angiosperms: A Critical Appraisal
Priyanka Kumari,Sajid I. Khan,Ishfaq Ahmad Wani,Renu Gupta,Susheel Verma,Pravej Alam,Abdullah Alaklabi +6 more
TL;DR: This review focuses on the mechanism of epigenetic modifications and their dynamic role in maintaining the genomic integrity during plant development and reproduction.
References
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Chromatin Modifications and Their Function
TL;DR: The surface of nucleosomes is studded with a multiplicity of modifications that can dictate the higher-order chromatin structure in which DNA is packaged and can orchestrate the ordered recruitment of enzyme complexes to manipulate DNA.
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Thomas Jenuwein,C. David Allis +1 more
TL;DR: It is proposed that this epigenetic marking system represents a fundamental regulatory mechanism that has an impact on most, if not all, chromatin-templated processes, with far-reaching consequences for cell fate decisions and both normal and pathological development.
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Crystal structure of the nucleosome core particle at 2.8 Å resolution
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Julie A. Law,Steven E. Jacobsen +1 more
TL;DR: Drawing on insights from both plants and animals should deepen the understanding of the regulation and biological significance of DNA methylation.
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TL;DR: This work has shown that transcription occurs against a backdrop of mixtures of complex modifications, which probably have several roles, and suggests that a more likely model is of a sophisticated, nuanced chromatin 'language' in which different combinations of basic building blocks yield dynamic functional outcomes.
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