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

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外文摘要：A rice low temperature-induced albino variant was determined by the recessive ltia1 and ltia2 genes. LTIA1 and LTIA2 encode highly conserved mini-ribonucleases Ⅲ located 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 PS Ⅱ and seedling growth. LTIA1 and LTIA2 proteins are involved in splicing of atpF 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 equa-tor 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.

外文关键词：

RiceLow temperature induced albinoMini-RNase ⅢPresence/Absence variationsEvolution

作者：

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

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作者单位：

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

Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences,Institute of Plant Physiology and Ecology,Chinese Academy of Sciences,Shanghai 200032,China

University of Chinese Academy of Sciences,Beijing 100049,China

School of Life Sciences,Fudan University,Shanghai 200433,China

College of Life Sciences,Shanghai University,Shanghai,China

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

School of Agriculture,Yunnan University,Kunming 650504,Yunnan,China

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出版年：

2024

DOI：

10.1016/j.cj.2024.09.008

作物学报(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.12(5)