盐分胁迫对不同品种甘薯苗期离子吸收和分配的影响  

Effects of salt stress on ionic absorption and distribution of different varieties of sweet potato seedlings

作　　者：戚冰洁[1,2] 曹月阳[1,2] 许建平[1] 陈杰[1] 汪吉东[1] 张永春[1] 徐阳春[2] 

机构地区：[1]江苏省农业科学院农业资源与环境研究所农业部江苏耕地保育科学观测实验站,江苏南京210014 [2]南京农业大学资源与环境科学学院,江苏南京210095

出　　处：《中国土壤与肥料》2013年第6期77-82,共6页Soil and Fertilizer Sciences in China

基　　金：公益性行业农业专项(200903001-1);现代农业产业技术体系建设专项资金项目(CARS-11-B-15);IPNI国际合作项目(JIANGSU-11)

摘　　要：选取3种类型共6个甘薯品种(阜薯062-20,浙紫1号,徐薯18,白尾稍,烟薯25,徐菜1号),比较NaCl(0、85 mmol/L)处理20 d后,盐分对甘薯幼苗离子吸收和分配的影响。结果表明:盐分胁迫抑制甘薯幼苗的生长,以阜薯062-20、浙紫1号、徐薯18受影响相对较轻。盐分胁迫下植株大量积累Na+和Cl-,并抑制Ca2+和K+的积累;地上部Na+、Cl-的积累量明显高于根系。白尾稍、烟薯25、徐菜1号Na+和Cl-含量显著高于其他品种。NaCl处理下,阜薯062-20、浙紫1号、徐薯18甘薯幼苗的K+/Na+略高于白尾稍、烟薯25、徐菜1号;品种间Ca2+/Na+差异不大,但阜薯062-20、浙紫1号、徐薯18的SCa,Na较高。因此,6个甘薯品种中,阜薯062-20、浙紫1号、徐薯18苗期耐盐性表现更好。Seedlings growth,ionic absorption and distribution of six sweet potato varieties （Fushu No.062-20,Zhezi No.1,Xushu No.18,Baiweishao,Yanshu No.25,Xucai No.1） were studied after 20 days of NaCl treatment （0 and 85 mmol/L）.The results showed significant inhibition on seedlings growth and Fushu No.062-20,Zhezi No.1,Xushu No.18 appeared higher salt tolerance than other varieties under salt stress.Ions of Na ＋ and Cl-increased markedly and salt -ion content accumulation in shoots was much more than those in roots NaCl stress led to decrease of K ＋ and Ca2＋ contents.The concentration of Na ＋ and Cl-in the shoot and root of Baiweishao,Yanshu No.25,Xucai No.1 did not appear to be lower than anything else.The K＋/Na＋ ratio of Fushu No.062-20,Zhezi No.1,Xushu No.18 were slightly higher than Baiweishao,Yanshu No.25,Xucai No.1 under salt stress.The Ca2＋/Na＋ ratio showed little difference in various sweet potato varieties,but Fushu No.062-20,Zhezi No.1,Xushu No.18 were higher in SCa,Na.The results indicated that Fushu No.062-20,Zhezi No.1,Xushu No.18 had more tolerance to NaCl stress.

关 键 词：甘薯 幼苗 盐分胁迫 离子分布 

分 类 号：S531[农业科学—作物学]