不同浓度镉·铅胁迫对红麻生长的影响  

Effects of Cadmium and Lead on Growth of Kenaf(Hibiscus cannabinus L.)

作　　者：李正文[1] 李兰平[1,2] 岑华飞[1] 杨平飞[1] 周琼[1] 周瑞阳[1] 李志刚[1] 

机构地区：[1]广西大学农学院,广西南宁530005 [2]四川农业大学农学院,四川成都611130

出　　处：《安徽农业科学》2012年第31期15210-15213,共4页Journal of Anhui Agricultural Sciences

基　　金：广西自然科学基金(桂科自0991049)

摘　　要：[目的]为红麻杂交一代F1应用和铅、镉耐性植物的筛选提供理论依据。[方法]以红麻细胞质雄性不育系P3A、恢复系992及杂交种F1为材料,采用盆栽试验法,设定不同浓度Cd2+、Pb2+处理,研究红麻的生长效应及其对不同浓度镉、铅胁迫的反应。[结果]重金属胁迫显著抑制了红麻的生长,影响红麻的生物量(茎叶干重、根干重、根冠比)及干物质的分配;不同品种红麻对重金属胁迫的耐性存在显著差异;红麻杂交种的生长对重金属胁迫的响应表现出较强的中亲优势和超高亲优势,F1相对亲本的杂种优势在一定范围内随着重金属浓度的提高进一步增强。[结论]在一定阈值内,红麻杂交种在重金属胁迫下的生长表现出比亲本较强的耐性,红麻杂交种在耐重金属方面具有杂种优势。[Objective]The research aimed to provide the theoretical basis for the application of F1 hybrids of kenaf and the selection of Pb,Cd-tolerant plants.[Method] Responses of kenaf seedling to Cd and Pb stress were studied using pot planting of cytoplasmic male sterility（CMS） line P3A,restorer line 992,and their F1 hybrids.[Result] Cd and Pb stress significantly inhibited the growth of kenaf seedlings,biological yield（dry mass of lead and stem,root dry mass,ratio of root to shoot）and dry matter partitioning.Responses to Cd and Pb were different among different genotypes.The F1 hybrids showed positive midparent-/transgressive-heterosis.The heterosis of F1 increased under higher concentration of Cd and Pb within certin range.[Conclusion] F1 hybrids possessed higher Cd and Pb tolerance than that of the parents within certain range.

关 键 词：红麻 镉、铅 杂种优势 盆栽试验 

分 类 号：S563.5[农业科学—作物学]