Mobile ARGONAUTE 1d binds 22-nt miRNAs to generate phasiRNAs important for low-temperature male fertility in rice
文献类型： 外文期刊
作者： Si, Fuyan 1 ; Luo, Haofei 1 ; Yang, Chao 1 ; Gong, Jie 1 ; Yan, Bin 1 ; Liu, Chunyan 1 ; Song, Xianwei 1 ; Cao, Xiaofeng 1 ;
作者机构： 1.Chinese Acad Sci, State Key Lab Plant Genom, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Natl Ctr Plant Gene Res, Inst Genet & Dev Biol, Beijing 100101, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Inst Hybrid Wheat, Municipal Key Lab Mol Genet Hybrid Wheat, Beijing 100097, Peoples R China
4.Chinese Acad Sci, Innovat Acad Seed Design INASEED, Inst Genet & Dev Biol, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100039, Peoples R China
6.Chinese Acad Sci, CAS Ctr Excellence Mol Plant Sci, Beijing 100101, Peoples R China
关键词： mobile signal; ARGONAUTE; 22-nt miRNA; phasiRNA; low temperature; male sterility; rice
期刊名称：SCIENCE CHINA-LIFE SCIENCES （ 影响因子：10.372； 五年影响因子：7.587 ）
ISSN： 1674-7305
年卷期：
页码：
收录情况： SCI
摘要： Phased small interfering RNAs (phasiRNAs) are abundantly expressed in anthers and linked to environment-related male fertility in grasses, yet how they function under different environmental conditions remains unclear. Here, we identified a rice (Oryza sativa) low temperature-induced Argonaute (AGO) protein, OsAGO1d, that is responsible for generating phasiRNAs and preserving male fertility at low temperature. Loss of OsAGO1d function causes low-temperature male sterility associated with delayed programmed cell death of tapetal cells during anther development. OsAGO1d binds miR2118 and miR2275 family members and triggers phasiRNA biogenesis; it also binds 21-nt phasiRNAs with a 5 ' terminal U. In total, phasiRNAs from 972 loci are OsAGO1d-dependent. OsAGO1d protein moves from anther wall cells into meiocytes, where it loads miR2275 to produce 24-nt phasiRNAs. Together, our results show that OsAGO1d acts as a mobile signal to fine-tune phasiRNA production and this function is important for male fertility at low temperature.
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