摘要
采用水培方法研究外源Ca2+对海水胁迫油菜幼苗生长和其叶中抗氧化酶活性的缓解效应的结果表明,30%的海水显著抑制油菜幼苗生长;适宜浓度的外源Ca2+可以有效缓解海水对油菜的胁迫作用,即油菜种子的发芽率、苗高和鲜重以及叶中叶绿素含量均增加,丙二醛(MDA)含量下降,超氧化物歧化酶(SOD)和过氧化物酶(POD)活性维持较高水平;较高浓度的Ca2+则抑制油菜幼苗的生长;缓解海水胁迫油菜的适宜Ca2+浓度为10￣20mmol·L-1。
Mitigative effects of exogenous calcium on the plant growth and leaf anti-oxidative enzyme activities of Brassica napus seedlings under seawater stress were investigated with liquid culture method. The results showed that growth states of Brassica napus were significantly inhibited in 30% seawater culture. Optimum concentration of CaCl2 could effectively relieve the seawater damage to Brassica napus, resulting in elevated germination rate, seedling height, fresh weight and chlorophyll content; while SOD and POD maintained high activities. The results from this study showed that the proper concentration range for the growth of Brassica napus were from 10 to 20 mmol.L^-1, and excessively high CaCl2 concentration had inhibition on seedling growth.
出处
《植物生理学通讯》
CSCD
北大核心
2009年第8期761-764,共4页
Plant Physiology Communications
基金
浙江省重大科技专项优先主题国际合作项目(2007C14021)
关键词
CA^2+
油菜
海水胁迫
缓解
Ca^2＋
Brassica napus
seawater stress
mitigative
