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Plant Communications:植物胚胎发生综述~从模式植物拟南芥到作物

已有 595 次阅读 2020-12-29 10:11 |个人分类:每日摘要|系统分类:论文交流

Developmental and genomic architecture of plant embryogenesis: From model plant to crops

第一作者Alma Armenta-Medina

第一单位萨斯喀彻温大学

通讯作者Raju Datla


 Abstract 


胚胎发育重要性Embryonic development represents an important reproductive phase of sexually reproducing plant species.


胚胎发生早期:The fusion of egg and sperm produces the plant zygote, a totipotent cell that through cell division and cell identity specification in early embryogenesis establishes the major cell lineages and tissues of the adult plant.


胚胎发生中后期:The subsequent morphogenesis phase produces the full-sized embryo, while the late embryogenesis maturation process prepares the seed for dormancy and subsequent germination, ensuring continuation of the plant life cycle.


综述内容:In this review on embryogenesis, we compare the model eudicot Arabidopsis thaliana with monocot crops, focusing on genome activation, paternal and maternal regulation of early zygote development, and key organizers of patterning such as auxin and WOX transcription factors.


单、双子叶比较:While the early stages of embryo development are apparently conserved among plant species, embryo maturation programs have diversified between eudicots and monocots.


分化原因:This diversification in crop species reflects the likely effects of domestication on seed quality traits that are determined during embryo maturation, and also assures seed germination in different environmental conditions.


结论:This review describes the most important features of embryonic development in plants, and the scope and applications of genomics in plant embryo studies.


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 摘  要 


胚胎发育是有性生殖植物物种中一个重要的生殖阶段。卵细胞和精细胞的融合形成了合子细胞,该细胞具备全能性,在早期胚胎发生过程中通过细胞分裂和细胞身份特化建立起以后成熟植物植株中主要的细胞谱系和组织。早期胚胎发生随后进入形态发生阶段,形成了全尺寸胚胎,再之后的后期胚胎成熟阶段主要是为种子进入休眠以及随后的萌芽做准备,从而确保了植物生命周期的连续性。在本综述中,作者比较了拟南芥与单子叶作物之间的胚胎发生过程,主要聚焦于基因组激活、父母本对于早期胚胎发生的控制、以及诸如生长素和WOX转录因子等胚胎模式建成的关键组织因子。胚胎早期发育阶段在植物物种间明显保守,而胚胎成熟过程在双子叶和单子叶植物之间存在分化。而这种分化在作物物种中反应的极有可能是,对于在胚胎成熟过程中所决定的种子质量性状驯化的影响,同时保证种子在不同的环境条件下可以萌发。本文综述了植物胚胎发育的主要特征,以及基因组学在植物胚胎发生研究中的应用范围。

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 通讯作者 

**Raju Datla**


研究方向:作物性能与产量背后的潜在发育和分子机制


doi: https://doi.org/10.1016/j.xplc.2020.100136


Journal: Plant Communications

First Published: Dec 14, 2020



http://blog.sciencenet.cn/blog-3158122-1264672.html

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