嫁接西瓜根系浸提液化感作用研究  

Study on Allelopathy of Root Extract from Grafted Watermelon

作　　者：陈淑芳[1] 吴芳芳[1] 

机构地区：[1]安徽科技学院生命科学学院,安徽凤阳233100

出　　处：《种子》2011年第12期49-52,共4页Seed

基　　金：安徽省教育厅优秀人才专项(2009 SQRZ 109);安徽科技学院引进人才基金项目(ZRC 2007142)

摘　　要：以西瓜自身为受体,采用生物测定的方法,研究嫁接西瓜根系水浸液的化感作用。结果表明,与对照相比,0.01、0.02、0.04 g/ml浸提液处理对种子萌发有化感促进作用,0.08 g/ml浸提液处理表现为化感抑制作用,0.01 g/ml和0.02g/ml处理化感强度较大。从西瓜幼苗生长状况来看,0.01 g/ml和0.02 g/ml根系浸提液处理促进根系生长或植株苗的生长,苗干重增加,对西瓜幼苗生长起化感促进作用,0.04 g/ml和0.08 g/ml浸提液处理对西瓜幼苗生长起抑制作用,0.08 g/ml浸提液处理化感强度最大。幼苗体内MDA含量的变化,表明在较高浓度浸提液处理下,植株受到伤害,进而生长受抑。嫁接西瓜根系浸提液的化感作用整体表现为低促高抑。Watermelon itself as receptor, the allelopathy of root water extract from grafted watermelon was studied by bioassay methods. The result showed that compared with the control, watermelon seed germination exhibited allelopathic promotion in 0.01 g/ml,0.02 g/ml and 0.04 g/ml root extract treatments,seed germination exhibited allelopathic inhibition in 0.08 g/ml root extract treatment, in which the allelopathic potential of 0.01 g/ml and 0.02 g/ml root extract treatment was better. In terms of watermelon seedling growth, root length or plant height improved and plant dry weight increased in 0.01 g/ml and 0.02 g/ml root extract treatments, which played allelopathic promotion on seedling growth. In 0.04 g/ml and 0.08 g/ml root extract treatments, watermelon seedling growth was inhibited, and the allelopathic potential of 0.08 g/ml root extract treatment was the best. The change of MDA content explained that plant was injury by high concentration extract treatment and growth was inhibited. As a whole, allelopathy of root water extract from grafted watermelon was stimulatory in lower concentration and inhibitory in higher concentration.

关 键 词：嫁接西瓜 根系浸提液 化感作用 

分 类 号：S651[农业科学—果树学]