镉对水稻种子萌发的影响  

Effects of cadmium on rice seed germination

作　　者：曾翔[1,2] 张玉烛 王凯荣[3] 李小湘 段永红 谢建红 张岳平[1,2] 屠乃美[4] 

机构地区：[1]湖南省水稻研究所 [2]湖南农业大学农学院,长沙410128 [3]青岛农业大学农业生态与环境健康研究所 [4]湖南农业大学农学院

出　　处：《应用生态学报》2007年第7期1665-1668,共4页Chinese Journal of Applied Ecology

基　　金：农业部农业结构调整重大研究专项(04-01-03B);国家"十五"重大科技攻关项目(2004BA520A01);湖南省农业科学院青年学术带头人培养计划资助项目.

摘　　要：以不同类型的319个水稻品种为研究对象,研究了10mg·L-1Cd2+处理对水稻种子萌发的影响.结果表明:Cd2+对种子发芽率影响较小,对根系生长的影响显著,且大于对芽生长的影响;不同类型水稻种子萌发对Cd的响应差异较大,敏感顺序为粳稻>籼稻>杂交稻;两系不育系根系长度和根系数量受Cd的抑制程度显著高于三系.应用快速聚类方法,可以将参试品种划分为耐受型、中间型和敏感型3种不同的敏感类型.With 319 rice varieties as test objects, this paper studied the effects of cadmium on theil seed germination. The results showed that after treated with 10 mg·L^-1 of Cd^2＋ , seed germination rate was less affected, but root growth was restrained evidently. Cadmium had more serious impac on root than on sprout. Different rice varieties had different germination responses to Cd^2＋ , with th~ sequence of conventional rice （Japonica rice） 〉 hybrid rice （Indianica rice） 〉 conventional ric （Indianica rice）. The root length and number of two-line sterilities were restrained more strong] than those of three-line sterilities. Based on their responses to Cd^2＋ , the test 319 varieties wer, clustered into 3 types, i. e. , endurant type, medium type, and sensitive type.

关 键 词：水稻 CD 种子 萌发 

分 类 号：X173[环境科学与工程—环境科学]