数字农科院2.0

Epigenetic insight into floral transition and seed development in plants

文献类型： 外文期刊

作者： Mahmood T.;He S.;Abdullah M.;Sajjad M.;Jia Y.;Ahmar S.;Fu G.;Chen B.;Du X.

作者机构：

关键词： （1-0-2）Chromatin remodeling;Epigenetics;Flowering regulation;Photoperiod;Plant ageing;Seed development;Vernalization

期刊名称： Plant Science

ISSN： 0168-9452

年卷期： 2024 年 339 卷

页码：

收录情况： SCIE（2024版）

摘要： Seasonal changes are crucial in shifting the developmental stages from the vegetative phase to the reproductive phase in plants, enabling them to flower under optimal conditions. Plants grown at different latitudes sense and interpret these seasonal variations, such as changes in day length (photoperiod) and exposure to cold winter temperatures (vernalization). These environmental factors influence the expression of various genes related to flowering. Plants have evolved to stimulate a rapid response to environmental conditions through genetic and epigenetic mechanisms. Multiple epigenetic regulation systems have emerged in plants to interpret environmental signals. During the transition to the flowering phase, changes in gene expression are facilitated by chromatin remodeling and small RNAs interference, particularly in annual and perennial plants. Key flowering regulators, such as FLOWERING LOCUS C (FLC) and FLOWERING LOCUS T (FT), interact with various factors and undergo chromatin remodeling in response to seasonal cues. The Polycomb silencing complex (PRC) controls the expression of flowering-related genes in photoperiodic flowering regulation. Under vernalization-dependent flowering, FLC acts as a potent flowering suppressor by downregulating the gene expression of various flower-promoting genes. Eventually, PRCs are critically involved in the regulation of FLC and FT locus interacting with several key genes in photoperiod and vernalization. Subsequently, PRCs also regulate Epigenetical events during gametogenesis and seed development as a driving force. Furthermore, DNA methylation in the context of CHG, CG, and CHH methylation plays a critical role in embryogenesis. DNA glycosylase DME (DEMETER) is responsible for demethylation during seed development. Thus, the review briefly discusses flowering regulation through light signaling, day length variation, temperature variation and seed development in plants. © 2023 Elsevier B.V.

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