摘要
为探究黄瓜植株感染根结线虫后水分亏缺的原因,通过人工接种的方法研究根结线虫对黄瓜植株根、茎水势相关特性的影响。结果表明:根结线虫侵染黄瓜植株后导致植株根、茎水势和茎粗降低;根、茎可溶性蛋白和茎可溶性糖含量在接种量为6000个/株时显著增加;根系活力在接种量为2000个/株时有所升高,之后随着接种量的增加逐渐降低。茎水势仅与茎粗和根系活力显著相关,然而,除根可溶性糖外,其他所有指标均与根水势显著相关。黄瓜植株感染根结线虫后,根系活力、茎粗的降低和根系过度的渗透调节是根、茎水分亏缺的主要原因。
To explore the reasons of cucumber plant infected with root-knot nematodes (RKNs),the effects of RKNs on the related characters of water potentials in the root and shoot of cucumber plant were studied through artificial inoculation.The results showed that after RKNs infection,water potential in the root and shoot as well as shoot diameter of cucumber plant decreased.Soluble protein content in the root and shoot,as well as soluble sugar content in the shoot all rose significantly when inoculation rate was 6000 eggs per plant.Root activities increased slightly when the inoculation rate was 2000 eggs per plant,and then it reduced gradually with increased inoculation rate.Water potential in the shoot was significantly correlated with only root activities and shoot diameter.In contrast,significant correlations between water potential in the root and all the other indexes except for soluble sugar in the root were observed.Decrease in root activities and shoot diameter and excessive osmotic regulation in the root were the main reasons for water deficit in the root and shoot of cucumber plant infected with RKNs.
出处
《中国农学通报》
CSCD
北大核心
2011年第27期308-311,共4页
Chinese Agricultural Science Bulletin
关键词
根结线虫
黄瓜
水势
根系活力
渗透调节
root-knot nematode
cucumber
water potential
root activities
osmotic regulation