不同盐分类型胁迫对豌豆幼苗离子吸收、累积及运输的影响  

Effects of various types of salt stress on ion absorption,accumulation and transportation in pea (Pisum sativum) seedlings

作　　者：董放[1] 曹靖[1] 李先婷 张琳捷[1] 岳小红[1] 耿杰[1] 张金林[3] 

机构地区：[1]草地农业生态系统国家重点实验室,兰州大学生命科学学院,甘肃兰州730000 [2]信阳市环境监测站,河南信阳464000 [3]草地农业生态系统国家重点实验室,兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《草业学报》2016年第11期66-75,共10页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(31071866)资助

摘　　要：为了探究不同类型盐分(NaCl、混合Na盐和混合Cl盐)胁迫下3个品种(‘银豌1号’、‘S5001-1’和‘737’)的豌豆幼苗对离子吸收与运输的生理机制,采用水培方法对3个品种的豌豆幼苗的盐分离子吸收、分布、累积特性进行了研究。结果表明,1)3个品种的豌豆幼苗在NaCl和混合Na盐处理下,地上部和根系Na^+含量较对照均显著增加,而K^+、Ca^(2+)含量则显著降低;混合Cl盐处理下,豌豆幼苗地上部和根系Na^+含量较对照均无显著差异,而Cl^-、K^+、Ca^(2+)和Mg^(2+)含量均显著高于NaCl处理和混合Na盐处理。2)3个品种的豌豆幼苗在正常生长条件下均优先吸收并富集K^+,其次是Ca^(2+);在NaCl和混合Cl盐处理下优先吸收并富集K^+,其次是Na^+和Cl^-;混合Na盐处理下则优先吸收并富集Na^+和K^+,其次是Ca^(2+),但不同处理下离子的分布和累积状况在不同品种的豌豆幼苗间有所不同。3)NaCl和混合Na盐处理下,3个品种的豌豆幼苗的离子选择性吸收系数SAK,Na、SACa,Na和SAMg,Na显著升高,而在混合Cl盐处理下显著降低。同一处理下,3个品种的豌豆幼苗间的离子选择性运输系数也表现不同,NaCl和混合Na盐处理下,‘S5001-1’的STK,Na和STCa,Na较对照显著升高,而‘银豌1号’的STK,Na和STCa,Na在混合Na盐和混合Cl盐处理下较对照显著降低,3个品种的豌豆幼苗间的STK,Na在混合Cl盐处理下无显著差异。以上结果说明,NaCl和混合Na盐处理下,豌豆幼苗地上部对Ca^(2+)、K^+和Mg^(2+)的累积量明显下降,同时为了应对盐分胁迫,根系对Ca^(2+)、K^+和Mg^(2+)的吸收及运输能力则显著增强;在混合Cl盐处理下,豌豆幼苗地上部对Ca^(2+)、K^+和Mg^(2+)的吸收及累积量较其他两种盐分处理明显增加,但根系对于Ca^(2+)、K^+和Mg^(2+)的吸收及运输能力则显著低于其他两种盐分处理,而且品种间差异显著。本结果对于阐明不同盐分类型胁迫下植物对离子吸收与运输�In order to investigate the physiological mechanisms of ion absorption,accumulation and transportation in pea seedlings under various types of salt stress（NaCl,mixed sodium salts and mixed chlorine salts,the control treatment was Hoagland nutrient solution）,the characteristics of absorption and accumulation of ions in three varieties of pea（‘Yinwan NO.1＇,‘S5001-1＇and‘737＇）seedlings were studied using a hydroponic method.Key findings were：1）Under NaCl and mixed sodium salt stress,Na^＋contents in shoots and roots were significantly higher than control,whereas contents of K^＋and Ca^2＋were significantly lower.Under mixed chlorine salt stress,Na^＋contents in shoots and roots did not differ significantly from those of control plants.However,contents of Cl^-,K^＋,Ca^2＋and Mg^2＋were significantly higher than for the other two salt treatments.2）Under the control treatment,K^＋was absorbed and accumulated prior to other ions in three varieties of pea,followed by Ca^2＋.Under NaCl and mixed chlorine salt stress,K^＋was absorbed and accumulated prior to other ions,followed by Na^＋and Cl^-.Under mixed sodium salt stress,Na^＋and K^＋was absorbed and accumulated prior to other ions,followed by Ca^2＋,while the characteristics of transportation and accumulation of salt ions among three varieties of pea were different under various types of salt stress.3）Under NaCl and mixed sodium salt stress,the selective absorption coefficients SAK,Na、SACa,Naand SAMg,Nain the three varieties of pea were significantly higher than in control plants,while significantly lower than under mixed chlorine salt.The STK,Na and STCa,Nain ‘S5001-1＇seedlings were significantly higher under NaCl and mixed sodium salt stress than in control plants,whereas the STK,Naand STCa,Nain‘Yinwan NO.1＇under mixed sodium salt and mixed chlorine salt treatments were significantly lower than for controls.The STK,Naof the three varieties of pea were similar under mixed chlorine salt stress.The study showed that th

关 键 词：盐分类型 盐分胁迫 离子吸收与运输 豌豆 

分 类 号：S643.3[农业科学—蔬菜学] Q945.78[农业科学—园艺学]