Origin of the presence/absence variation of the LTIA1/LTIA2 mini-ribonucleaseⅢgenes required for low-temperature growth in rice  

作　　者：Jing Yang Yu Peng Limin Mi Aiqing Sun Ping Li Yan Wang Yi Zhang Sheng Teng 

机构地区：[1]Key Laboratory of Microbiological Metrology,Measurement&Bio-product Quality Security,State Administration for Market Regulation,College of Life Sciences,China Jiliang University,Hangzhou 310018,Zhejiang,China [2]Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences,Institute of Plant Physiology and Ecology,Chinese Academy of Sciences,Shanghai 200032,China [3]School of Life Sciences,Fudan University,Shanghai 200433,China [4]College of Life Sciences,Shanghai University,Shanghai,China [5]School of Agriculture,Yunnan University,Kunming 650504,Yunnan,China [6]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《The Crop Journal》2024年第5期1459-1470,共12页作物学报（英文版）

基　　金：supported by Zhejiang Provincial Natural Science Foundation of China (LD24C130002);Scientific Research Foundation of China Jiliang University。

摘　　要：A rice low temperature-induced albino variant was determined by the recessive ltia1 and ltia2 genes.LTIA1 and LTIA2 encode highly conserved mini-ribonucleasesⅢlocated in chloroplasts and expressed in aerial parts of the plant.At low temperature,LTIA1 and LTIA2 redundantly affect chlorophyll levels,non-photochemical quenching,photosynthetic quantum yield of PSⅡand seedling growth.LTIA1 and LTIA2 proteins are involved in splicing of atp F and the biogenesis of 16S and 23S rRNA in chloroplasts.Presence/absence variation of LTIA1,the ancestral copy,was found only in japonica but that of LTIA2 in all rice subgroups.Accessions with LTIA2 presence tended to be distributed more remote from the equator compared to those with LTIA2 absence.LTIA2 duplicated from LTIA1 at the early stage of divergence of the AA genome Oryza species but deleted againin O.nivara.In cultivated rice,absence of LTIA2 is derived from O.nivara.LTIA1 absence occurred more recently in japonica.

关 键 词：RICE Low temperature induced albino Mini-RNaseⅢ Presence/Absence variations Evolution 

分 类 号：S511[农业科学—作物学]