安徽农业大学学报2017，Vol.44Issue(2)：185-189,5.DOI:10.13610/j.cnki.1672-352x.20170419.005
外源NO对渗透胁迫下茶树种子萌发的影响
Effects of exogenous nitric oxide on seed germination of Camellia sinensis (L.) O.Kuntze under osmotic stress
摘要
Abstract
In order to investigate the effects of exogenous nitric oxide (NO) on seed germination of (Camellia sinensis (L.) O.Kuntze) under osmotic stress,the seeds of tea plants were treated with 20％ PEG6000 and SNP at 0,20,50,100,200 and 300 μmol· L-1,separately.The results showed that exogenous nitric oxide could significantly promote the germination of tea seeds under osmotic stress,and the optimal concentration was 100 μmol· L-1.With increasing SNP concentration,the seed germination and seedling growth were suppressed;meanwhile,the seed germination rate,germination index,root length and vigor index were decreased.A further study suggested that 100 μmol· L-1 SNP could promote enzyme activities of SOD,POD,CAT,APX,GR and GPX,and it also reduced the MDA concentration and relative electrical conductivity under osmotic stress.The results suggested that NO could alleviate oxidative damages of tea seeds by increasing the activities of antioxidant enzymes;therefore,NO may play an important role in alleviation of osmotic stress in tea seeds.关键词
一氧化氮/茶树/渗透胁迫/种子萌发/硝普钠Key words
nitric oxide/tea(Camellia sinensis (L.) O.Kuntze)/osmotic stress/germination/sodium nitroprussiate分类
农业科技引用本文复制引用
蒋家月,何俊忠,江昌俊,李叶云,胡国策,符姿..外源NO对渗透胁迫下茶树种子萌发的影响[J].安徽农业大学学报,2017,44(2):185-189,5.基金项目
“十二五”科技支撑计划子课题(2011BAD01B01)资助. （2011BAD01B01）
