摘要
对 3种含笑、3个种源 1年生苗在冬季 - 6℃极端自然低温处理后 ,测定植株体内可溶性糖、丙二醛(MDA)及脯氨酸的含量。结果表明 ,可溶性糖含量高的含笑种及种源抗寒性强 ;MDA含量在一定范围内随种及种源抗寒性的减弱而升高 ,当冻害表现较严重时 ,其含量有所下降 ;脯氨酸含量与含笑树种间抗寒性的关系不明显。综合测定指标与田间观察结果显示 ,供试含笑同一种源树种间抗寒性强弱依次为 :深山含笑 ,乐昌含笑 ,醉香含笑 ;深山含笑种源间抗寒性强弱依次为浙江杭州种源 ,湖南长沙种源 ,安徽黄山种源 ;乐昌含笑的浙江杭州种源抗寒性略高于湖南长沙种源。笔者认为 ,可溶性糖与MDA指标可作为含笑抗寒性生理指标 ,用于含笑及种源抗寒性选择 。
After -6 ℃ natural low temperature disaster,the physiological indices of cold resistance in 1 year seedlings of three kinds of Michelia with three species were detected.The results demonstrated that the species with high content of soluble sugar appeared strong cold resistance.The content of MDA increases with its cold resistance decreasing within certain range and while freezing seriously,its content decreases.There is no remarkable relationship between the content of proline and cold resistance.According to these indices and results from field,we discovered that the alignment of cold resistance of Michelia was M.maudiae>M.chapensis>M.macclurei.The alignment of provenance in M.maudiae of that was Hangzhou>Huangshan;The cold resistance of provenance in M.chapensi was Hangzhou slightly higher than Changsha.The indices of soluble sugar and MDA can be as cold resistance index of Michelia,and may be used to select cold resistance.The content of proline only can be as a reference index.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第4期62-64,共3页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
江苏省"十五"农业科技攻关项目 (BE2 0 0 13 5 2 )
