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科学网—Plant Cell:花申博开户确定调控分子机制

发布日期:2019-11-10 05:24

AUXIN RESPONSE FACTOR3 Regulates Floral Meristem Determinacy By Repressing Cytokinin Biosynthesis and Signaling

First author:Ke Zhang; Affiliations: Institute of Genetics and Developmental Biology of CAS(中科院遗传与新产品生物谈论工作实验室):Hebei, China

Corresponding author:Xigang Liu (刘锡帮)

Successful floral meristem (FM) determinacy is critical for subsequent reproductive development (生殖新产品) and the plant life cycle. Although the phytohormones cytokinin and auxin interact to coregulate many aspects of plant development, whether and how cytokinin and auxin function in FM determinacy remain unclear. Here we show that in Arabidopsis thaliana, cytokinin homeostasis is critical for FM determinacy. In this developmental context, auxin promotes the expression of AUXIN RESPONSE FACTOR3 (ARF3) to repress cytokinin activity. ARF3 directly represses the expression of ISOPENTENYLTRANSFERASE (IPT) family genes and indirectly represses LONELY GUY (LOG) family genes, both of which encode enzymes required for cytokinin biosynthesis. ARF3 also directly inhibits the expression of ARABIDOPSIS HISTIDINE KINASE4 (AHK4), a cytokinin receptor gene, resulting in reduced cytokinin activity. Consequently, ARF3 controls cell division by regulating cell cycle gene expression through 细胞分裂素 In flowers, we show that AGAMOUS (AG) dynamically regulates the expression of ARF3 and IPTs, resulting in coordinated regulation of FM maintenance and termination through cell division. Moreover, genome-wide transcriptional profiling revealed both repressive and active roles for ARF3 in early flower development. Our findings establish a molecular link between AG and auxin/cytokinin and shed light on the mechanisms of stem cell maintenance and termination in the 校频。


成的花申博开户决定是随后生殖新产品和种植性命圈的要紧阶段。不管种植激素细胞分裂素和生长素互作共调控种植多方面的新产品阶段,另一方面细胞分裂素和生长素设想和如安在花申博开户决定中起到效能性的功能还未知。本文的谈论显示拟南芥切中要害细胞分裂素内静态倾向于花申博开户的决定至关要紧。在该新产品诉讼中,生长素助长生长素回报或回复限定词ARF3管理权细胞分裂素起作用的的情报表达。ARF3会指导管理权异戊烯基移换酶IPT家族情报,不坦率的管理权LOG家族情报,这两个家族的情报都编码细胞分裂素生物分解渠道上的酶。ARF3还会指导管理权拟南芥用于名词前致活酶AHK4情报的表达,就是这样情报是细胞分裂素接收器情报,会实现细胞分裂素起作用的的使还原。综上,ARF3经过细胞分裂素调控细胞周期情报来把持细胞分裂。在花中,谈论显示AG会调控ARF3IPTs情报的表达,于是经过细胞分裂整体的调控花申博开户的做蜜饯和结果。另外,全情报广袤的结交谱显示ARF3在初期花新产品中同时拟人化着管理权和促进感受性功能。本文的撞见评议了独一AG和生长素/细胞分裂素中间的分子关系,并显露了花申博开户中干细胞做蜜饯和结果的分子机械化。


新闻报道刘锡帮()

个人简介:1993-1997年,河北师范大学,生物有某种文科知识的人;1998-2001年,河北师范大学,分子细胞生物硕士;2001-2004年,河北师范大学,分子细胞生物博士;2004-2007年,现在称Beijing性命技术谈论工作实验室,种植细胞生物博士后;2007-2009年,美国加州大学河滨分校,种植新产品生物博士后;2009-2011年,美国加州大学河滨分校,种植新产品生物进修生。

谈论支座:年老的种植的新产品生物和小麦高生产率及抗逆生理。次要包罗种植器官形式中干细胞的做蜜饯和分异的分子机制;小耳状物新产品处理中调控每每穗粒数的效能情报及互作体系;C3及C4种植抗逆的分子机械化。意志为显露种植新产品中干细胞调控及分异的分子机制,解析调控小麦每每穗粒数的效能情报互作体系和C3,C4种植抗逆反应的分子机械化,终极为培育高生产率抗逆的作物新品种布置理论原则。


doi: https://doi.org/10.1105/tpc.17.00705

Journal: Plant Cell

First Published date: 25 January, 2018

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