Rice transcription factor MADS32 regulates floral patterning through interactions with multiple floral homeotic genes
文献类型： 外文期刊
作者： Hu, Yun 1 ; Wang, Li 1 ; Jia, Ru 1 ; Liang, Wanqi 1 ; Zhang, Xuelian 1 ; Xu, Jie 1 ; Chen, Xiaofei 1 ; Lu, Dan 1 ; Chen, Min 1 ;
作者机构： 1.Shanghai Jiao Tong Univ, Joint Int Res Lab Metab & Dev Sci, Shanghai Jiao Tong Univ Univ Adelaide Joint Ctr A, State Key Lab Hybrid Rice,Sch Life Sci & Biotechn, Shanghai 200240, Peoples R China
2.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, Shanghai 201403, Peoples R China
3.Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA
4.Univ Melbourne, Sch Biosci, Melbourne, Vic 3010, Australia
5.Univ Copenhagen, Dept Plant & Environm Sci, DK-1871 Frederiksberg C, Denmark
6.Univ Copenhagen, Copenhagen Plant Sci Ctr, DK-1871 Frederiksberg C, Denmark
7.Univ Adelaide, Sch Agr Food & Wine, Waite Campus, Urrbrae, SA 5064, Australia
关键词： Floral meristem activity; MADS-box transcription factors; OsMADS32; protein interaction; rice
期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：5.908； 五年影响因子：7.011 ）
ISSN： 0022-0957
年卷期： 2021 年 72 卷 7 期
页码：
收录情况： SCI
摘要： Floral patterning is regulated by intricate networks of floral identity genes. The peculiar MADS32 subfamily genes, absent in eudicots but prevalent in monocots, control floral organ identity. However, how the MADS32 family genes interact with other floral homeotic genes during flower development is mostly unknown. We show here that the rice homeotic transcription factor OsMADS32 regulates floral patterning by interacting synergistically with E class protein OsMADS6 in a dosage-dependent manner. Furthermore, our results indicate important roles for OsMADS32 in defining stamen, pistil, and ovule development through physical and genetic interactions with OsMADS1, OsMADS58, and OsMADS13, and in specifying floral meristem identity with OsMADS6, OsMADS3, and OsMADS58, respectively. Our findings suggest that OsMADS32 is an important factor for floral meristem identity maintenance and that it integrates the action of other MADS-box homeotic proteins to sustain floral organ specification and development in rice. Given that OsMADS32 is an orphan gene and absent in eudicots, our data substantially expand our understanding of flower development in plants.
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