辣椒品种对盐胁迫的响应  

Response of pepper varieties to salinity stress

作　　者：郑佳秋[1,2,3] 郭军[3] 吴永成[3] 祖艳侠[3] 梅燚[3] 丁莎莎[3] 

机构地区：[1]江苏省盐土生物资源研究重点实验室,江苏盐城224002 [2]江苏滩涂生物农业协同创新中心,江苏盐城224002 [3]江苏沿海地区农业科学研究所,江苏盐城224002

出　　处：《浙江农业学报》2014年第4期908-914,共7页Acta Agriculturae Zhejiangensis

基　　金：江苏省农业科技自主创新资金项目[CX(13)3003];江苏省盐土生物资源研究重点实验室项目(JKLBS2013009);国家星火计划(2014GA690258)

摘　　要：在土培条件下采用模拟盐胁迫的方法,对16个辣椒(Capsicum annum L.)品种在盐胁迫下萌芽期和幼苗期的生长和生理特性进行研究。结果表明,在盐胁迫下所有供试辣椒品种在萌芽期的发芽率、发芽势、发芽指数、苗长、胚根长、苗重和胚根重均有不同程度的降低;幼苗期的过氧化物酶(POD)、过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)活性总体表现为增加,可溶性糖和可溶性蛋白含量则总体呈现下降趋势,超氧化物歧化酶(SOD)不同品种表现不同。多元方差分析表明,相对发芽率、相对发芽指数等14个性状指标表现出显著差异性,以隶属函数值为依据的系统聚类分析将供试的辣椒品种分为3类,其中红艳、剑圣1、万家灯火、长虹361、红秀和北研尖椒3号为耐盐性较强的品种,剑圣2、博辣五号、红圣008、剑圣3和苏椒12号为耐盐性中等品种,利剑1、干鲜三号、长虹366、艳红1和艳红2为耐盐性较弱品种。The growth and physiological characters of sixteen pepper （ Capsicum annum L.） varieties under salinity stress during seed germination and seedling stage were studied by the method of simulation in soil cultivation .The results showed that under salinity stress , percentage of germination , germination vigor , germination index , sprout height, radicle length, fresh mass of sprout and fresh mass of radical of all tested pepper varieties were decreased to different extent during seed germination stage.Peroxidase（POD）activities, catalase（CAT）activities and ascorbate peroxidase （ APX ） activities of all pepper varieties were increased , while soluble sugar content , soluble protein content of all pepper varieties were decreased , and superoxide dismutase （ SOD ） activities, different varieties displayed diverse responses to salinity stress .The fourteen character indexes from different varieties , such as relative percentage of germination and relative germination index etc showed significant difference by using multivariate variance analysis .Based on subjection values , the sixteen cultivars were classified into three categories by cluster analysis, Hongyan, Jiansheng1, Wanjiadenghuo, Changhong361, Hongxiu and Beiyanjianjiao No.3 were salt tolerant varieties, whereas Jiansheng2, Bolawuhao, Hongsheng008, Jiansheng3 and Sujiao No.12 were moderately salt tolerant＆amp;nbsp;varieties, but Lijian1, Ganxian No.3, Changhong366, Yanhong1 and Yanhong2 were salt sensitive varieties .

关 键 词：辣椒 盐胁迫 生理响应 聚类分析 

分 类 号：S641.3[农业科学—蔬菜学]