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当前位置: 首页 > 文章 > 角果木根系盐胁迫的防御机理 热带生物学报 2013,4 (2) 160-164
Position: Home > Articles > Preliminary Study on the Salt Stress Defense Mechanisms of Ceriops tagal Root Journal of Tropical Biology 2013,4 (2) 160-164

角果木根系盐胁迫的防御机理

作  者：
臧剑;符秀梅;王鹤鸣;林道哲;吴辉;陈健妙;陈银华
单  位：
海南大学海南省热带生物资源可持续利用重点实验室
关键词：
红树;角果木;盐胁迫;抗氧化系统
摘  要：
以强耐盐性红树植物角果木为研究对象,采用不同浓度的NaCl溶液(0,150,300,450mmol·L-1)对角果木幼苗进行盐胁迫处理,测定角果木根部的SOD,POD,ASA,MDA等生理指标。结果表明:角果木在适应盐环境的过程中有新的蛋白产生,在盐胁迫早期(≤9h)MDA含量急剧上升,这种信号诱导了抗氧化防御系统的启动,使角果木根部抗氧化酶类及抗氧化物质均有所增加,说明角果木盐胁迫下通过启动抗氧化酶类、抗氧化物质以清除活性氧对根部的损伤,而后开始适应外界盐环境。
译  名：
Preliminary Study on the Salt Stress Defense Mechanisms of Ceriops tagal Root
作  者：
ZANG Jian 1 ,FU Xiumei 1 ,WANG Heming 1 ,LIN Daozhe 1 ,WU Hui 1 ,CHEN Jianmiao 1 ,CHEN Yinhua ( 1. Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources,Hainan University,Haikou 570228,China; 2. College of Agronomy,Hainan University,Haikou 570228,China)
关键词：
mangrove; Ceriops tagal; salt stress; antioxidant defense system
摘  要：
Mangroves are woody plants that grow along tropical and subtropical coasts and form clumpy stands in intertidal zones. The anatomical and physiological features associated with their salt-tolerant lifestyles have not been well characterized,little is known about the impact of defensive enzymes on their adaptation to these saline environments. In this study,the enzyme activity of superoxide dismutase ( SOD) ,peroxidase ( POD) ,ascorbic acid( ASA) and Malondialdehyde ( MDA) in the C. tagal roots treated by four concentrations ( 0,150,300,450 mmol·L- 1 ) of NaCl were studied in a greenhouse of Hainan University,Haikou,China. The results showed that the activity of MDA had a sharp increase at early stressed time,and this signal induces the appearance of antioxidative defensive system,including a certain increase of SOD,POD,ASA. which indicated that cell plasma membrane of C. tagal roots had rather strong resistance to the injury of salt ion. These results established a theoretical foundation for salt tolerance mechanism of C. tagal.

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