摘要
在温室条件下,以一年生木棉盆栽苗为材料,研究不同干旱胁迫时间处理对木棉幼苗生理生化特性的影响。结果显示:木棉幼苗对干旱胁迫表现出明显的应激反应,随着干旱胁迫时间的延长,叶片的相对含水量(RWC)降低,其体内与抗性密切相关的防御酶活性也随着干旱时间延长发生明显的变化,过氧化物酶(POD)和过氧化氢酶(CAT)活性呈现出先升高后降低的趋势,游离脯氨酸(PRO)和丙二醛(MDA)含量逐渐增加,总生物量总体呈降低趋势,根冠比则随胁迫时间延长而逐渐升高。
A pot experiment was conducted to study the effects of different drought time on the physiological characteristics of Bombax ceiba.The results showed that the seedlings represented obvious stress reaction.When the drought stress lasted,the leaf relative water content decreased,the activity of protective enzyme also changed,with peroxidase and catalase activity decreased after an initial increase,the contents of proline and malondialdehyde continued to increase,the total biomass reduced and root shoot ratio increased.
出处
《热带作物学报》
CSCD
北大核心
2014年第10期2020-2024,共5页
Chinese Journal of Tropical Crops
基金
广东省广州市科技和信息化局应用基础专项(No.2013J4100086)
广州市科技和信息化局条件建设专项(No.2060402)
广州市财政局项目(No.2061300000166)
关键词
木棉
干旱胁迫
生理生化
Bombax ceica
Drought stress
Physiology
