植物营养与肥料学报2011，Vol.17Issue(5)：1035-1043,9.
水稻生长、根系生理特性和ABA含量的基因型差异与耐盐性的关系
Responses of different rice genotypes to salt stress and its relation to plant growth, root physiological characteristics and ABA content
摘要
Abstract
To further inspect physiological mechanisms of salt tolerant ability between different rice genotypes, and reveal salt tolerant ability mechanisms of rice which was regulated by ABA content in root during early salt stress stage, a solution culture experiment was conducted at phytotron in International Rice Research Institute （IRRI） from Oct. 2009 to Feb. 2010, and strictly controlled the water supply, temperature, illumination and nutrients supplying. The results showed that biomass of the tolerant genotype （ IR651 ） is higher than that of the sensitive genotype （ IR29 ）, and the Na ＋ content of the tolerant genotype is diluted by higher biomass, and is lower than that of the sensitive genotype. There is no significant difference of total Na ^＋ absorption between the sensitive and tolerant genotypes. The root biomass of the tolerant genotype is higher than that of the sensitive genotype, and amount of Na ＋ in roots of the tolerant genotype is higher than that of the sensitive genotype, while the amount of Na ^＋ in shoot of the tolerant genotype is lower than that of the sensitive genotype. Because of large amount of ABA in roots of the tolerant genotype during the early salt stress stage, the stomatal conductance and transpiration effective of the tolerant genotype are decreased significantly, the Na^＋ absorption is inhibited by decreasing of transpiration effective, and salt stress of rice plant is alleviated at a large scale. It can be concluded that compared with the sensitive genotype, the tolerant genotype has special root physiological characteristics, higher biomass and special ABA regulation mechanisms, that＇s why the tolerant ability of the tolerant genotype is higher than that of the sensitive genotype significantly under the saline condition.关键词
水稻基因型/耐盐性/盐胁迫/根系生理特性/ABA含量Key words
rice genotype/salt tolerant ability/salt stress/root physiological characteristics/ABA content分类
农业科技引用本文复制引用
张振华,刘强,宋海星,荣湘民,Abdelbagi M．Ismail..水稻生长、根系生理特性和ABA含量的基因型差异与耐盐性的关系[J].植物营养与肥料学报,2011,17(5):1035-1043,9.基金项目
STRASA Project funded by the Bill and Melinda Gates Foundation,USA （）
国家留学基金委公派留学基金 （）
湖南省教育厅重点实验室开放基金项目 （）
湖南农业大学人才引进基金（2011YJ21）资助. （）
