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当前位置: 首页 > 文章 > 盐胁迫下棉花体内Na~+的积累、分配及耐盐机制研究 棉花学报 2006,18 (5) 279-283
Position: Home > Articles > Characteristics of Absorbing,Accumulating and Distribution of Na~+ under the Salinity Stress on Cotton Cotton Science 2006,18 (5) 279-283

盐胁迫下棉花体内Na~+的积累、分配及耐盐机制研究

作  者：
叶武威;庞念厂;王俊娟;樊宝相
单  位：
中国农业科学院棉花研究所
关键词：
棉花;盐胁迫;Na+;耐盐性;NaCl;耐盐机制
摘  要：
NaCl胁迫下,棉花体内以阳离子Na+为主要毒害因子,耐盐性不同的棉花根、茎、叶内Na+积累量存在显著差异,Na+含量吸收和累积最多的部位是:不耐盐材料的根、耐盐材料的根和叶、强耐盐的叶。不同耐盐性的材料从外界吸收的Na+总量就全植株来讲大致相同,只是在体内各器官的分布存在差异;低浓度NaCl(0.2%)下,不耐盐、耐盐材料的全植株Na+量分别上升1.9倍和2.9倍;高浓度NaCl(0.4%)下,不耐盐、耐盐、强耐盐材料分别比对照上升3.6倍、5.2倍和5.3倍。尽管棉花萌发阶段几乎不吸盐,但成株期是吸盐的,且吸盐量提高很多倍,这说明棉花对盐分的吸收具有发育阶段性,同时也反映出棉花耐盐的阶段性。总之认为棉花的耐盐机理与小麦、大麦等作物不同,具特殊性。
译  名：
Characteristics of Absorbing,Accumulating and Distribution of Na~+ under the Salinity Stress on Cotton
作  者：
YE Wu-wei,PANG Nian-chang,WANG Jun-juan,FAN Bao-xiang (Cotton Research Institute of CAAS,Anyang,Henan 455000,China)
关键词：
cotton;saline stress;Na~+;salinity resistance;NaCl;tolerant mechanism
摘  要：
Under the stress of NaCl,the main active infector is the cation(Na~+).Na~+ is absorbed and accumulated distinctively among the different organs such as root,stem,leaf within the various salinity-resisted genotypes of cotton.It is the root of salinity-sensitive genotype,the root and leaf of salinity-resisted genotype,or the leaf of the salinity-high-resisted genotype whose Na~+ is absorbed and accumulated most highly.But Na~+ absorbed by the whole frond is almost the same according to the stress environment,while there is different among the different organs.Under the stress of lower concentration of NaCl(0.2%),Na~+ absorbed in the salinity-sensitive genotype and the resisted or high-resisted genotype was 1.9 times and 2.9 times of the control,respectively;while under the stress of higher concentration of NaCl(0.4%),Na~+ absorbed in the salinity-sensitive genotype,in the resisted and in high-resisted genotype is 3.6 times,5.2 times and 5.3 times of the control,respectively. Cotton is salinity-escaping-type in the germination period while salinity-high-absorbing-type in the later growth periods,which suggests the resisted mechanism is staggered and in phases.Overall,the salinity-resisted mechanism of cotton is different from other crops such as wheat and barley.

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