拟南芥
生物
基因
转录因子
细胞生物学
拟南芥
表型
转基因
抑制因子
遗传学
突变体
作者
Seonghoe Jang,Hsing-Yi Li
出处
期刊:Plant Biotechnology
[Japanese Society for Plant Cell and Molecular Biology]
日期:2018-09-25
卷期号:35 (3): 273-279
被引量:9
标识
DOI:10.5511/plantbiotechnology.18.0508a
摘要
Recently, two rice genes, OsAPETALA2 (OsAP2) and OsWRKY24 have been reported to be positive regulators involved in increased lamina inclination and grain size through cell elongation. Here, we found that the two genes have tightly linked expression patterns and functional convergence in rice, and are also likely to play an opposite role in Arabidopsis. Overexpression of the two rice transcription factors in Arabidopsis caused smaller plant size with reduced cell size, and the expression of a series of genes encoding expansins and xyloglucan endotransglucosylase/hydrolases (XTHs) involved in cell elongation was reduced. However, transgenic Arabidopsis expressing OsWRKY24-SRDX as a synthetic chimeric repressor displayed indistinguishable phenotypes from wild-type plants. Moreover, the subcellular localization pattern of OsWRKY24 in Arabidopsis was different from that in rice. Thus, we demonstrate an example of transcription factors from one species playing distinct roles in different plant species.
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