摘要
氮素作为植物生长发育所需的大量元素,对植物生长发育及作物产量具有重要作用。施入氮肥是植物及作物的主要氮素来源。面对当下过度施肥造成面源污染加剧的现状,提高作物氮素利用效率,实现“减肥增产”的绿色增产增效模式,是促进我国农业可持续发展及保障国家粮食安全的重要措施。当土壤氮匮缺时,硝酸盐转运蛋白NRT2家族成员对根系吸收及转运硝酸盐至关重要,其中NRT2.1在植物缺氮时主要负责根部的硝酸根吸收。该文重点总结了模式植物拟南芥(Arabidopsis thaliana)及重要粮油作物中NRT2家族蛋白特别是NRT2.1的功能及调控机理研究进展,旨在为后续挖掘NRT2在提高作物产量方面的潜力及分子调控机制研究提供重要依据。
Nitrogen,the essential macronutrient in plants,plays a critical role in regulating plant growth and development,especially for crops production.To gain high crop yield,a large amount N fertilizer is usually applied to the planting field.However,the excessive use of chemical fertilizers has aggravated the agricultural non-point source pollution(NSP).Increasing crop yield under reduced fertilizer consumption can be achieved by increasing nitrogen use efficiency(NUE),which is crucial for promoting sustainable agriculture and for achieving agriculture and food security.In response to nitrogen-deficiency condition under natural environments,high-affinity nitrate transporter 2(NRT2)proteins have evolved in plants.Among them,NRT2.1 subfamily acts as the main component of nitrate uptake in roots under conditions of nitrate deficiency.Here we summarize the latest progresses of the function and molecular mechanism of the NRT2 proteins,particularly of the NRT2.1 subfamily in Arabidopsis and several important crops and discuss the future directions of NRT2 research.This review aims to provide an important basis for the subsequent exploration of the potential of NRT2 proteins in increasing crop yield and the underlying molecular mechanisms.
作者
黄慧梅
高永康
台玉莹
刘超
曲德杰
汤锐恒
王幼宁
Huimei Huang;Yongkang Gao;Yuying Tai;Chao Liu;Dejie Qu;Ruiheng Tang;Youning Wang(National Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University,Wuhan 430070,China;College of Agronomy,Northwest Agriculture and Forestry University,Yangling 712100,China)
出处
《植物学报》
CAS
CSCD
北大核心
2023年第5期783-798,共16页
Chinese Bulletin of Botany
基金
湖北省自然科学基金(No.2022CFB172)
国家重点研发计划(No.2021YFF1000500)。
