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• W2896104255 abstract "Summary The phytohormone abscisic acid ( ABA )‐induced leaf senescence facilitates nutrient reuse and potentially contributes to enhancing plant stress tolerance. However, excessive senescence causes serious reductions in crop yield, and the mechanism by which senescence is finely tuned at different levels is still insufficiently understood. Here, we found that the double mutant of core enzymes of the polycomb repressive complex 2 ( PRC 2) is hypersensitive to ABA in Arabidopsis thaliana . To elucidate the interplay between ABA and PRC2 at the genome level, we extensively profiled the transcriptomic and epigenomic changes triggered by ABA . We observed that H3K27me3 preferentially targets ABA ‐induced senescence‐associated genes ( SAG s). In the double, but not single, mutant of PRC 2 enzymes, these SAG s were derepressed and could be more highly induced by ABA compared with the wild‐type, suggesting a redundant role for the PRC 2 enzymes in negatively regulating ABA ‐induced senescence. Contrary to the rapid transcriptomic changes triggered by ABA , the reduction of H3K27me3 at these SAG s falls far behind the induction of their expression, indicating that PRC 2‐mediated H3K27me3 contributed to long‐term damping of ABA ‐induced senescence to prevent an oversensitive response. The findings of this study may serve as a paradigm for a global understanding of the interplay between the rapid effects of a phytohormone such as ABA and the long‐term effects of the epigenetic machinery in regulating plant senescence processes and environmental responses." @default.
• W2896104255 created "2018-10-26" @default.
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• W2896104255 date "2018-11-28" @default.
• W2896104255 modified "2023-10-06" @default.
• W2896104255 title "Polycomb repressive complex 2 attenuates ABA-induced senescence in Arabidopsis" @default.
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• W2896104255 doi "https://doi.org/10.1111/tpj.14125" @default.
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