果树学报2011，Vol.28Issue(5)：863-868,6.
嫁接西瓜根系分泌物的化感效应及其化感物质的鉴定
Allelopathic effects and identification of allelochemicals in root exudates of grafted watermelons
摘要
Abstract
In order to study the allelopathic effects of root exudates from the watermelons grafted with pumpkin and calabash as rootstocks,effects of root exudates from the watermelons grafted on the seed germination and seedling growth of watermelons were researched.The Allelochemicals of root exudates were detected by GC-MS.The results showed that the seed germination and seedling growth of watermelons were increased when the root exudates were in low concentration,but decreased in high concentration.The root exudates promoted the seed germination and seedling growth of watermelons at 2.5 μL·L-1.The root exudates began to restrain the seed germination and seedling growth of watermelons at 10 μL·L-1.When the concentrations were lower,the root exudates from grafted watermelons had more effects on the seed germination and seedling vegetal promotion than own-rooted watermelons.The inhibiting effect of grafted watermelons was less than that of own-rooted watermelon at high concentration of root exudates.And the identification of the allelochemicals in root exudates of grafted watermelons indicated that the categories and the relative contents were different from the own-root plants.The results showed that grafting changed the categories and the relative contents of root exudate components and changed allelopathic effects.Furthermore,there was obvious grafting superiority.So grafting was one of the effective methods for relieving the continuous cropping obstacles caused by autotoxicity.关键词
西瓜/嫁接/根系分泌物/化感效应/化感物质Key words
Watermelon/Graft/Root exudates/Allelopathy/Allelochemicals分类
农业科技引用本文复制引用
郑阳霞,唐海东,李焕秀,严泽生,郭学君..嫁接西瓜根系分泌物的化感效应及其化感物质的鉴定[J].果树学报,2011,28(5):863-868,6.基金项目
四川省教育厅重点科研项目(00322300) （00322300）
