生命科学研究2025，Vol.29Issue(4)：291-296,303,7.DOI:10.16605/j.cnki.1007-7847.2025.01.0114
水稻钾转运蛋白OsHAK8参与籽粒发育的调控机制研究
Study on the Regulatory Mechanism of Potassium Transporter OsHAK8 in Rice Grain Development
摘要
Abstract
As an essential mineral nutrient for plant growth and development,potassium ion(K+)is highly prone to leaching from soil with rainwater.This leads to widespread potassium deficiency in southern rice-growing regions of China,consequently resulting in reduced rice yields.Previous studies have shown that K+nutrition influences grain development by modulating the grain-filling process.To further explore the rela-tionship between K+transport and grain development,phenotypic observations and physiological analyses were conducted on high-affinity K+transporter 8(OsHAK8)knockout mutant rice lines.The results revealed that loss of OsHAK8 significantly reduced grain length,width,and thousand-grain weight.Additionally,the mutant exhibited pronounced chalkiness in the endosperm,loosely packed starch granules,decreased total starch and amylose content,reduced sucrose levels,and shortened bi-peak tubercle distances in the outer epidermal cells of the hull.These findings suggest that OsHAK8 likely regulates rice grain development by mediating carbohydrate accumulation in the endosperm and promoting the expansion of hull epidermal cells.This study not only expands the understanding of the biological functions of the HAK transporter family,but also provides a novel genetic resource for breeding high-quality and high-yield rice varieties.关键词
高亲和钾离子转运蛋白8(OsHAK8)/籽粒发育/水稻/基因资源Key words
high-affinity K+ transporter 8(OsHAK8)/grain development/rice/genetic resource分类
农业科技引用本文复制引用
唐倪文,王玉英,张佩珊,魏烨莹,王晓辉..水稻钾转运蛋白OsHAK8参与籽粒发育的调控机制研究[J].生命科学研究,2025,29(4):291-296,303,7.基金项目
2020年度湖南省教育厅科学研究项目(20C1124) （20C1124）
