摘要
铁是植物正常生长发育必需的微量元素之一。在通气良好的碱性或石灰性土壤中,常常因铁有效性低而难以满足植物生长发育所需,缺铁已成为继缺氮和缺磷之后农业生产所面临的又一重要的营养障碍因子。与机理Ⅱ植物相比,机理Ⅰ植物更易缺铁,因此全面了解机理Ⅰ植物的铁吸收及利用机制是分子育种改良此类植物铁营养的重要基础。基于国内外的相关研究进展,从机理Ⅰ植物的根际铁活化、根系铁吸收、木质部和韧皮部中的铁运输以及胞外和胞内铁的再利用等几方面进行综述;在此基础上,从bHLH和MYB转录因子调控网络、蛋白的泛素化修饰以及小分子化学信号调控途径等几方面,重点阐述机理Ⅰ植物铁营养吸收、转运及稳态平衡过程的调控机制;同时,对研究中存在的部分问题及未来研究方向进行简要的讨论分析。
Iron(Fe)is an essential microelement for plant growth and development,however,its bioavailability is severely limited in well-aerated or calcareous soils.As a result,Fe deficiency is often one of the key factors limiting the health growth and production of crops,and the strategy Ⅰ plants are more likely to suffer Fe deficiency than the strategy Ⅱ plants.Molecular breeding for improving Fe nutrition highly depends on the well understanding of the mechanisms of Fe uptake and utilization in strategy Ⅰ plants.This paper reviewed firstly the activation of Fe in rhizosphere,its uptake by root cells and subsequent transportation in xylem and phloem,and reutilization of intra-and extra-cellular Fe in strategy Ⅰ plants.Then the regulation mechanisms of Fe uptake,transportation and homeostasis in strategy Ⅰ plants were focused,including the regulatory network of bHLH and MYB transcription factors,ubiquitination of proteins,and signaling transduction of small molecular weight chemicals.Finally,some unsolved questions and future researches were discussed.
作者
张林琳
刘星星
祝亚昕
金崇伟
ZHANG Lin-lin;LIU Xing-xing;ZHU Ya-xin;JIN Chong-wei(College of Natural Resources and Environmental Science,Zhejiang University,Hangzhou 310029,China)
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2021年第7期1258-1272,共15页
Journal of Plant Nutrition and Fertilizers
基金
国家重点研发项目(2016YFD0200103)
浙江省自然科学基金项目(LZ21D010001)。
关键词
机理Ⅰ植物
缺铁胁迫
铁吸收
铁转运
信号调控
strategyⅠplant
Fe deficiency
Fe uptake
Fe translocation
signal regulation
