不同基因型水稻耐汞性及汞积累差异比较  

Comparison on the Mercury Tolerance and Accumulation among Different Rice(Oryza sativa L.) Genotypes

作　　者：余有见[1] 胡海涛[1] 施瑶佳[1] 王晓丹[1] 杨玲[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江金华321004

出　　处：《安徽农业科学》2009年第2期492-493,503,共3页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(30771330);浙江省自然科学基金重点项目(Z306300)

摘　　要：[目的]比较不同基因型水稻的耐汞性及汞积累差异。[方法]选取8个基因型水稻,分别为:Kasalath,IR64,日本晴,浙粳22,Azu-cena,广陆矮4号,IR1552和9311。用0.08 mmol/LHgC l2溶液对水稻种子浸种24 h、5叶期幼苗根部胁迫处理8 d。[结果]汞处理种子24 h后,Kasalath的发芽率降幅最大,而9311的发芽率几乎不受影响。汞胁迫下,9311幼苗根系耐性系数、根(冠)相对生物量比其他基因型水稻都高;不同基因型间的根、叶汞含量不同。[结论]8个基因型水稻中,9311的耐汞性最强,其次为IR64,Azucena耐汞性最弱;IR64是高汞积累基因型。[ Objective ] Hg^2＋ tolerance and accumulation among different rice （ Oryza sativa L. ） genotypes during germination and growth were compared. [ Method] The rice seeds were soaked with 0.08 mmol/L HgCl2 solution for 24 h. The five-leaf seedlings were treated in nutrient solution containing 0.08 mmol/L HgCl2 for 8 d. [ Result] The germination rate of Kasalath had the largest decrease after soaked with 0.08 mmol/L HgCl2 solution for 24 h , but that of 9311 was little affected by Hg^2＋ treatments. Root tolerance index, root and shoot relative biomass of 9311 were much higher than the other genotypes under Hg^2＋ stress. Hg^2＋ content in roots and leaves were different among different rice genotypes. [ Conclusion ] In eight rice genotypes, the Hg^2＋ tolerance of 9311 was the best, then was IR64, and Azucena was the worst. IR64 accumulated more Hg^2＋ than the other genotypes.

关 键 词：水稻 汞胁迫 耐性 

分 类 号：S511[农业科学—作物学]