文献类型： 外文期刊
作者： Wang, Zhongni 1 ; Chen, Doudou 2 ; Lin, Xuelei 2 ; Wang, Jing 5 ; Arif, Muhammad 5 ; Li, Jiali 1 ; Gong, Yanlong 1 ; Lei, Yue 1 ; Wu, Xian 1 ; Wu, Chaoxin 1 ; Zhu, Susong 1 ; Li, Luhua 5 ;
作者机构： 1.Guizhou Acad Agr Sci, Guizhou Rice Res Inst, Guiyang 550006, Peoples R China
2.Chinese Acad Sci, Inst Bot, Key Lab Plant Mol Physiol, Beijing 100093, Peoples R China
3.Guangzhou Univ, Innovat Ctr Mol Genet & Evolut, Sch Life Sci, Guangdong Prov Key Lab Plant Adaptat & Mol Design, Guangzhou 510006, Peoples R China
4.Chinese Acad Sci, Inst Genet & Dev Biol, Key Lab Plant Cell & Chromosome Engn, Beijing 100101, Peoples R China
5.Guizhou Univ, Coll Agr, Guiyang 550025, Peoples R China
6.Guizhou Sub Ctr Natl Wheat Improvement Ctr, Guiyang 550025, Peoples R China
关键词：
Rice;
期刊名称：RICE （ 影响因子：5.0； 五年影响因子：5.5 ）
ISSN： 1939-8425
年卷期： 2025 年 18 卷 1 期
页码：
收录情况： SCI
摘要： Precise regulation of floral primordia initiation is essential for normal flower development. However, the mechanisms regulating floral primordia initiation (PI) are complex and poorly understood. Herein, we identified a natural mutant in rice, stamen less (sl), which develops florets with reduced stamen number and no carpel due to defects in stamen and carpel PI. STAMENLESS (SL) encodes the CC-type glutaredoxin OsROXY2 and is involved in the regulation of stamen PI. OsROXY1, the closest homolog of OsROXY2, showed no function in stamen PI regulation. The osroxy1 single mutant showed normal reproductive development, while the floret phenotypes of osroxy1/2 double mutant were comparable to those of osroxy2 mutant. The TGA transcription factor OsbZIP47 showed a strong interaction with OsROXY2, and the two genes exhibited overlapping subcellular localizations and expression patterns during flower development. The number of stamens in the osbzip47 mutant was increased to seven (around 35%), indicating that OsbZIP47 is a negative regulator of stamen PI, in contrast to OsROXY2. Taken together, our results reveal that OsROXY2 regulates stamen number via interaction with OsbZIP47, indicating GRX-TGA-mediated floral organ number regulation mechanism is conserved in monocots and eudicots.
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