Epigenetic control of plant senescence and linked processes

Ay, Nicole; Janack, Bianka; Humbeck, Klaus

doi:10.1093/jxb/eru132

Cited by 69 publications

(59 citation statements)

References 131 publications

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“…Several lines of evidence indicate that leaf senescence is regulated by epigenetic mechanisms, such as histone modifications, chromatin architecture and DNA methylation (Fischer ; Humbeck ; Ay et al . ). It is proposed that unrepaired DNA damage increases not only mutations, but also heritable changes in DNA methylation (Holliday & Grigg ).…”

Section: Age‐associated Alterations Of Dna Methylation In Plantsmentioning

confidence: 97%

“…It is possible that DNA methylation is an important mechanism for epigenetic regulation of plant ageing and senescence, since it is known that the major developmental phase transitions, plant stress responses and leaf senescence are under epigenetic control, including DNA methylation (Humbeck ; Ay et al . ). Therefore, in the present review we also aimed to summarise and discuss studies where levels of DNA methylation have been investigated in relation to plant chronological age or to the degree of maturity of plant tissues.…”

Section: Introductionmentioning

confidence: 97%

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Age‐associated alterations in the somatic mutation and DNA methylation levels in plants

Dubrovina

Kiselev

2015

Plant Biol J

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Somatic mutations of the nuclear and mitochondrial DNA and alterations in DNA methylation levels in mammals are well known to play important roles in ageing and various diseases, yet their specific contributions await further investigation. For plants, it has also been proposed that unrepaired DNA damage and DNA polymerase errors accumulate in plant cells and lead to increased somatic mutation rate and alterations in transcription, which eventually contribute to plant ageing. A number of studies also show that DNA methylation levels vary depending on the age of plant tissue and chronological age of a whole plant. Recent studies reveal that prolonged cultivation of plant cells in vitro induces single nucleotide substitutions and increases global DNA methylation level in a time-dependent fashion. Changes in DNA methylation are known to influence DNA repair and can lead to altered mutation rates, and, therefore, it is interesting to investigate both the genetic and epigenetic integrity in relationship to ageing in plants. This review will summarise and discuss the current studies investigating somatic DNA mutation and DNA methylation levels in relation to plant ageing and senescence. The analysis has shown that there still remains a lack of clarity concerning plant biological ageing and the role of the genetic and epigenetic instabilities in this process.

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Section: Age‐associated Alterations Of Dna Methylation In Plantsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Age‐associated alterations in the somatic mutation and DNA methylation levels in plants

Dubrovina

Kiselev

2015

Plant Biol J

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“…In addition to abiotic factors, attacks by pathogens are signaled to the chromatin to induce defensive gene expression [54,55]. Finally, intrinsic responses to wounding [56] or senescence [57] are able to modify chromatin configurations.…”

Section: Stress Types Modifying Chromatin Parametersmentioning

confidence: 99%

Stress-induced structural changes in plant chromatin

Probst

Scheid

2015

Current Opinion in Plant Biology

161

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Stress defense in plants is elaborated at the level of protection and adaptation. Dynamic changes in sophisticated chromatin substructures and concomitant transcriptional changes play an important role in response to stress, as illustrated by the transient rearrangement of compact heterochromatin structures or the modulation of chromatin composition and modification upon stress exposure. To connect cytological, developmental, and molecular data around stress and chromatin is currently an interesting, multifaceted, and sometimes controversial field of research. This review highlights some of the most recent findings on nuclear reorganization, histone variants, histone chaperones, DNA- and histone modifications, and somatic and meiotic heritability in connection with stress.

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“…It was shown that SET domain-containing proteins regulated plant developmental processes such as floral organogenesis, seed development11 and plant senescence12. More recent studies demonstrated that SET domain-containing proteins were also involved in plant defense in response to different environmental stresses.…”

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confidence: 99%

Identification of SET Domain-Containing Proteins in Gossypium raimondii and Their Response to High Temperature Stress

Huang

Chen

et al. 2016

Sci Rep

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SET (Su(var), E(z), and Trithorax) domain-containing proteins play an important role in plant development and stress responses through modifying lysine methylation status of histone. Gossypium raimondii may be the putative contributor of the D-subgenome of economical crops allotetraploid G. hirsutum and G. barbadense and therefore can potentially provide resistance genes. In this study, we identified 52 SET domain-containing genes from G. raimondii genome. Based on conserved sequences, these genes are grouped into seven classes and are predicted to catalyze the methylation of different substrates: GrKMT1 for H3K9me, GrKMT2 and GrKMT7 for H3K4me, GrKMT3 for H3K36me, GrKMT6 for H3K27me, but GrRBCMT and GrS-ET for nonhistones substrate-specific methylation. Seven pairs of GrKMT and GrRBCMT homologous genes are found to be duplicated, possibly one originating from tandem duplication and five from a large scale or whole genome duplication event. The gene structure, domain organization and expression patterns analyses suggest that these genes’ functions are diversified. A few of GrKMTs and GrRBCMTs, especially for GrKMT1A;1a, GrKMT3;3 and GrKMT6B;1 were affected by high temperature (HT) stress, demonstrating dramatically changed expression patterns. The characterization of SET domain-containing genes in G. raimondii provides useful clues for further revealing epigenetic regulation under HT and function diversification during evolution.

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Epigenetic control of plant senescence and linked processes

Cited by 69 publications

References 131 publications

Age‐associated alterations in the somatic mutation and DNA methylation levels in plants

Age‐associated alterations in the somatic mutation and DNA methylation levels in plants

Stress-induced structural changes in plant chromatin

Identification of SET Domain-Containing Proteins in Gossypium raimondii and Their Response to High Temperature Stress

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