草业科学2016，Vol.33Issue(9)：1681-1689,9.DOI:10.11829/j.issn.1001-0629.2016-0179
干旱胁迫及复水对黄连花幼苗生长和生理特性的影响
Effects of drought stress and rewatering on seedling growth and physiological characteristics of Lysimachia davurica
摘要
Abstract
The effect of 20 d drought stress and rewatering on seedling morphological and physiological charac-teristics of Lysimachia davurica were studied.The results showed that growth and development of L.davuri-ca were gradually inhibited as drought stress extended.The growth of above ground part of seedling was de-pressed first when drought stress lasted for less than 10 days and soil moisture content was higher than 14.52%.The leaf area and relative water content were reduced,while chlorophyll content,MDA content,solu-ble sugar,proline,POD and CAT activities of seedling were increased.The plant could quickly restored growth except the shoot tip when rewatering at this time.When drought stress lasted for 1 5 days,the seedling severely lost water and the upper part of the seedlings shriveled.66.66% new sprout grew after rewatering.L.davurica would be dying and could not be revived after rewatering if drought stress lasted for 20 days.Therefore,L.da-vurica should be rewatered timely to rescue seedling when the drought stress was more than 10 days and the soil moisture content was less than 14.52%.关键词
黄连花/干旱胁迫/复水/形态特征/生理指标Key words
Lysimachia davurica/drought stress/rewatering/morphological indicators/physiological indices分类
农业科技引用本文复制引用
张彦妮,雷蕾,夏斌..干旱胁迫及复水对黄连花幼苗生长和生理特性的影响[J].草业科学,2016,33(9):1681-1689,9.基金项目
黑龙江省留学归国基金项目(LC201410) （LC201410）
黑龙江省教育厅科研项目(12543012) （12543012）
