The Arabidopsis EIN2 restricts organ growth by retarding cell expansion
The Arabidopsis EIN2 restricts organ growth by retarding cell expansion
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拟南芥EIN2通过延缓细胞扩张来限制器官生长
DOI：
10.1080/15592324.2015.1017169
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发表时间：
2015-05-04
影响因子：
2.9
通讯作者：
Xiao, Jianhua
中科院分区：
文献类型：
--
作者：
Feng, Guanping;Liu, Gang;Xiao, Jianhua
植物器官的生长是一个基本的发育过程，但其机制仍然知之甚少。植物激素通过调节细胞分裂和/或细胞扩增在器官大小控制中发挥重要作用。乙烯不敏感2（EIN 2）首先通过对乙烯不敏感性的遗传筛选而被鉴定，并被认为是乙烯信号传导的中心组分，但其在细胞生长中的作用尚未报道。通过对EIN 2功能缺失突变体和过表达转基因植株的形态学和细胞学分析，证明EIN 2表达的改变导致了细胞扩增的抑制。我们的研究结果表明，EIN 2通过限制细胞扩增来控制最终器官的大小。
The growth of plant organ to its characteristic size is a fundamental developmental process, but the mechanism is still poorly understood. Plant hormones play a great role in organ size control by modulating cell division and/or cell expansion. ETHYLENE INSENSITVE 2 (EIN2) was first identified by a genetic screen for ethylene insensitivity and is regarded as a central component of ethylene signaling, but its role in cell growth has not been reported. Here we demonstrate that changed expression of EIN2 led to abnormity of cell expansion by morphological and cytological analyses of EIN2 loss-of-function mutants and the overexpressing transgenic plant. Our findings suggest that EIN2 controls final organ size by restricting cell expansion.