摘要
利用不同浓度壳寡糖溶液对小麦种子浸种,种子萌发后,对小麦幼苗进行Cd胁迫,研究了不同浓度的壳寡糖对小麦幼苗生长、超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)等抗氧化酶活性的影响。结果表明:不同浓度壳寡糖浸种,对镉胁迫下小麦幼苗生长有促进作用,幼苗高度、根长、生物量均有增加;幼苗叶片中叶绿素含量增高;SOD、POD和CAT活性增加。随着镉胁迫时间的延长,SOD和CAT活性降低,但降低幅度小于对照;POD活性却表现增加,增加的幅度大于对照。壳寡糖不同浓度之间比较,低浓度壳寡糖对镉毒害的缓解效果优于高浓度。说明壳寡糖预处理对镉胁迫有缓解作用。
Effects of different concentrations of oligochitosan were studied on seedling growth and antioxidative activities of wheat seedling stressed by Cd, under wheat seeds soaked in different concentrations of oligochitosan solution. Results indicated that under the treatment of different oligochitosan concentrations, the height of seedling increased, root length elongated as well as Chl a content, SOD, POD and CAT activities increased, which were stressed by Cd. When time stressed by Cd prolonged, SOD and CAT ac...
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第6期31-34,共4页
Environmental Science & Technology
基金
国家自然基金(30870205)
辽宁省自然科学基金(20052053)
沈阳师范大学主任基金(sy200705)
关键词
壳寡糖
镉
小麦
抗氧化酶
oligochitosan
Cd
wheat（Triticum aestivum L.）
antioxidative enzyme
