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• 研究报告 • 上一篇    下一篇

铜胁迫对水花生生长及活性氧代谢的影响

黄永杰1,2;杨红飞3;杨集辉1;王晓兰1;周守标1   

  1. 1安徽师范大学生命科学学院, 安徽芜湖 241000;2生物环境与生态安全安徽省高校重点实验室, 安徽芜湖 241000;3安徽中医药高等专科学校, 安徽芜湖 241000
  • 收稿日期:2008-09-21 修回日期:1900-01-01 出版日期:2009-06-10 发布日期:2009-06-10

Effects of Cu stress on Alternanthera philoxeroides growth and reactive oxygen species metabolism.

HUANG Yong-jie1,2;YANG Hong-fei3;YANG Ji-hui1;WANG Xiao-lan1;ZHOU Shou-biao1   

  1. 1College of Life Sciences, Anhui Normal University, Wuhu 241000, Anhui, China;2Provincial Key Laboratory of Biotic Environment and Ecological Safety in Anhui, Wuhu 241000, Anhui, China;3Anhui College of Chinese Traditional Medicine, Wuhu 241000, Anhui, China
  • Received:2008-09-21 Revised:1900-01-01 Online:2009-06-10 Published:2009-06-10

摘要: 采用水培实验,研究了不同浓度铜胁迫下水花生(Alternanthera philoxeroides)生长特性和体内生理特性的变化规律。结果表明:铜胁迫抑制植株正常生长;当铜浓度<5mg·L-1时,植物细胞内的SOD、POD和CAT酶活性均有所升高;当铜浓度>5 mg·L-1时,随着铜浓度增加,植株生长缓慢,生物量下降,叶片叶绿素含量下降,植物体内活性氧清除系统中的SOD、POD和CAT 3种酶的活性又逐渐下降,细胞膜透性增大和MDA含量高度积累,影响植物的正常生长代谢,且铜浓度为10 mg·L-1时植株外观表现重度伤害。

关键词: 杉木人工林, 土壤活性有机质, 微生物生物量碳, 水溶性有机碳, 水溶性碳水化合物

Abstract: The study on the growth and physiological traits of Alternanthera ph iloxeroides in a water culture under stress of different concentration Cu show ed that Cu stress inhibited the normal growth of A. philoxeroides. When the Cu concentration was <5 mg·L-1, the plant cellular SOD, POD, and CAT acti vities increased; when the Cu concentration was >5 mg·L-1, the plant grow th slowed down, the biomass, chlorophyll content, and SOD, POD and CAT activitie s decreased, and in addition, the cell membrane permeability increased and MDA h ad a higher accumulation, giving adverse impact on the plant normal growth and m etabolism; when the Cu concentration was 10 mg·L-1, a severe apparent dam age to the plant was observed.

Key words: Chinese fir plantation, Soil active organic matter, Microbial biomass C, Water-soluble organic C, Water-soluble carbohydrate