首页|Two ABCI family transporters,OsABCI15 and OsABCI16,are involved in grain-filling in rice

Two ABCI family transporters,OsABCI15 and OsABCI16,are involved in grain-filling in rice

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Seed development is critical for plant reproduction and crop yield,with panicle seed-setting rate,grain-filling,and grain weight being key seed characteristics for yield improvement.However,few genes are known to regulate grain filling.Here,we identify two adenosine triphosphate(ATP)-binding cassette(ABC)Ⅰ-type transporter genes,OsABCI15 and OsABCI16,involved in rice grain-filling.Both genes are highly expressed in developing seeds,and their proteins are localized to the plasma membrane and cytosol.Interestingly,knockout of OsABCI15 and OsABCI16 results in a significant reduction in seed-setting rate,caused predominantly by the severe empty pericarp phenotype,which differs from the previously reported low seed-setting phenotype resulting from failed pollination.Further analysis indicates that OsABCI15 and OsABCI16 participate in ion homeostasis and likely export ions between filial tissues and maternal tissues during grain filling.Importantly,overexpression of OsABCI15 and OsABCI16 enhances the seed-setting rate and grain yield in transgenic plants and decreases ion accumulation in brown rice.Moreover,the OsABCI15/16 orthologues in maize exhibit a similar role in kernel development,as demonstrated by their disruption in transgenic maize.Therefore,our findings reveal the important roles of two ABC transporters in cereal grain filling,highlighting their value in crop yield improvement.

ABC transportersRiceGrain fillingIon homeostasisGrain yield

Bin Ma、Xiubiao Cao、Xiaoyuan Li、Zhong Bian、Qi-Qi Zhang、Zijun Fang、Jiyun Liu、Qun Li、Qiaoquan Liu、Lin Zhang、Zuhua He

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Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology,Agricultural College of Yangzhou University,Yangzhou,Jiangsu 225009,China

Jiangsu Co-Innovation Center for Modem Production Technology of Grain Crops,Jiangsu Key Laboratory of Crop Genetics and Physiology,Yangzhou University,Yangzhou,Jiangsu 225009,China

National Key Laboratory o

Institute of Biotechnology,Hangzhou Academy of Agricultural Sciences,Hangzhou,Zhejiang 310024,China

National Key Laboratory of Plant Molecular Genetics,CAS Center for Excellence in Molecular Plant Sciences,Institute of Plant Physiology & Ecology,Chinese Academy of Sciences,Shanghai 200032,China

Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education,Yangzhou University,Yangzhou,Jiangsu 225009,China

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国家自然科学基金国家自然科学基金Research Programs from Jiangsu GovernmentProject of Zhongshan Biological Breeding LaboratoryPriority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)Key Scientific Research Project of the Higher Education Institution in Jiangsu Province

3210020632072037BE2022336BM2022008-0220KJA210002

2024

10.1016/j.jgg.2023.10.007

遗传学报
中国遗传学会 中国科学院遗传与发育生物学研究所

遗传学报

CSTPCD
影响因子：0.821
ISSN：1673-8527
年,卷(期)：2024.51(5)
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