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- W2904344182 abstract "The leaf, an important plant organ, plays a significant role in plant development, starting from organogenesis to abscission through senescence. Leaf senescence is the naturally evolved plant aging process, which utilizes the resources from departing leaves to the growing and storage organs of the plant by salvaging nutrients, especially nitrogen, which has a significant role in grain protein reserve. This crucial plant developmental process involves the complex regulatory network of concerted gene activity, hormonal regulation, and many other processes, including biotic and abiotic stresses. Of late, the technological advances in molecular biology make it possible to dissect the underlying complex molecular mechanism involved in leaf senescence. Eukaryotic deoxyribonucleic acid (DNA), along with the basic histone proteins, form three-dimensional (3D) packaging structures called nucleosomes, which can be either the euchromatin or the heterochromatin type, the former being transcriptionally active. A growing body of evidence indicates that the dynamic chromatin structure influences gene expression during senescence and related developmental processes by accessing the euchromatic DNA to transcription factors (TFs), ribonucleic acid (RNA) polymerases, and other regulatory proteins. This transient modification in chromatin architecture during leaf senescence is possible due to histone modification, chromatin remodeling, and changes in methylation, acetylation, phosphorylation, sumoylation, and ubiquitination of the histone proteins. This in turn regulates the transcription of senescence-associated genes (SAGs) in a reversible manner by transcriptional activation or repression during this transition. In this chapter, the recent progress in leaf senescence research, with special emphasis on the epigenetic regulation via alterations in chromatin organization, is described in detail." @default.
- W2904344182 created "2018-12-22" @default.
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- W2904344182 date "2019-01-01" @default.
- W2904344182 modified "2023-09-25" @default.
- W2904344182 title "Role of Histones During Leaf Senescence" @default.
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- W2904344182 doi "https://doi.org/10.1016/b978-0-12-813187-9.00011-1" @default.
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