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 ...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.展开更多
为了解灵芝南GL11菌丝的生物学特性,以菌落直径和菌丝体干重作为主要考察指标,结合菌落长势、菌丝球大小和均匀性等因素,采用固体和液体培养方法对菌丝生长曲线以及不同碳氮营养、p H和温度等条件下研究灵芝南GL11菌丝（体）的生长情况...为了解灵芝南GL11菌丝的生物学特性,以菌落直径和菌丝体干重作为主要考察指标,结合菌落长势、菌丝球大小和均匀性等因素,采用固体和液体培养方法对菌丝生长曲线以及不同碳氮营养、p H和温度等条件下研究灵芝南GL11菌丝（体）的生长情况。结果表明：培养72~96 h为对数生长期,可溶性淀粉、蛋白胨可为母种培养基的优质碳氮源,初始p H 6.0和30℃为最佳条件;而在液体培养基中菌丝对于麦芽糖和蛋白胨的利用效果最好,并且当接种量为4%（v/v）,在初始p H 8.0和26℃条件下有利于液体种的制备。展开更多
基金supported by the Innovation Program of Shanghai Municipal Education Commission(2023ZKZD05)the National Natural Science Foundation of China(32172043,31971918 and 32170356)+2 种基金the Shanghai Science and Technology Innovation Action Plan Project(22N11900200)the Innovation Program of Chinese Academy of Agricultural Sciencesthe grant from the National Key Research and Development Program of China(2021YFA1300401).
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.
文摘为了解灵芝南GL11菌丝的生物学特性,以菌落直径和菌丝体干重作为主要考察指标,结合菌落长势、菌丝球大小和均匀性等因素,采用固体和液体培养方法对菌丝生长曲线以及不同碳氮营养、p H和温度等条件下研究灵芝南GL11菌丝（体）的生长情况。结果表明：培养72~96 h为对数生长期,可溶性淀粉、蛋白胨可为母种培养基的优质碳氮源,初始p H 6.0和30℃为最佳条件;而在液体培养基中菌丝对于麦芽糖和蛋白胨的利用效果最好,并且当接种量为4%（v/v）,在初始p H 8.0和26℃条件下有利于液体种的制备。
