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| 1 | Post-transcriptional regulation of grain weight and shape by the RBP-A-J-K complex in rice显示文摘RNA-binding proteins(RBPs)are components of the post-transcriptional regulatory system,but their regulatory effects on complex traits remain unknown.Using an integrated strategy involving map-based cloning,functional characterizations,and transcriptomic and population genomic analyses,we revealed that RBP-K(LOC_Os08g23120),RBP-A(LOC_Os11g41890),and RBP-J(LOC_Os10g33230)encode proteins that form an RBP-A-J-K complex that negatively regulates rice yield-related traits.Examinations of the RBP-A-J-K complex indicated RBP-K functions as a relatively non-specific RBP chaperone that enables RBP-A and RBP-J to function normally.Additionally,RBP-J most likely affects GA pathways,resulting in considerable increases in grain and panicle lengths,but decreases in grain width and thickness.In contrast,RBP-A negatively regulates the expression of genes most likely involved in auxin-regulated pathways controlling cell wall elongation and carbohydrate transport,with substantial effects on the rice grain filling process as well as grain length and weight.Evolutionarily,RBP-K is relatively ancient and highly conserved,whereas RBP-J and RBP-A are more diverse.Thus,the RBP-A-J-K complex may represent a typical functional model for many RBPs and protein complexes that function at transcriptional and post-transcriptional levels in plants and animals for increased functional consistency,efficiency,and versatility,as well as increased evolutionary potential.Our results clearly demonstrate the importance of RBP-mediated post-transcriptional regulation for the diversity of complex traits.Furthermore,rice grain yield and quality may be enhanced by introducing various complete or partial loss-of-function mutations to specific RBP genes using clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein 9 technology and by exploiting desirable natural tri-genic allelic combinations at the loci encoding the components of the RBP-A-J-K complex through marker-assisted selection. | Ding Ren Hui Liu Xuejun Sun Fan Zhang Ling Jiang Ying Wang Ning Jiang Peiwen Yan Jinhao Cui Jinshui Yang Zhikang Li Pingli Lu Xiaojin Luo | 2024 | Journal of Integrative Plant Biology2024，66，1： | 0 |
| 2 | MAPKKK参与植物生长发育及逆境胁迫调控的研究进展显示文摘MAPKKK(Mitogen-activated protein kinase kinase kinase)作为MAPK级联信号通路的上游成员,负责接收外部信号并将其传输至下游MAPKK和MAPK,在MAPK级联信号接收、放大和传递过程中发挥重要作用。近年来有不少研究证实,MAPK级联信号通路在植物的生长发育过程及适应逆境胁迫方面都发挥着重要作用。综述了MAPKKK参与调控植物生长发育以及抵抗逆境胁迫功能的研究进展。 | 陈磊清 陈丽妃 | 2023 | 福建农业科技2023，54，9： | 0 |
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