Pb2+胁迫对桐花树碳代谢相关生理因子的影响-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Effects of Pb2+ Stress on Some Physiological Characters of the Carbohydrate Metabolism of Aegiceras corniculatum

Author(s):: WU Shi-jun; (Wetland Institute,Quanzhou Normal University,Quanzhou 362000China)

Keywords:: Pb2+ stress; carbohydrate metabolism; chlorophyll; amylase; Aegiceras corniculatum

摘要:: 研究Pb2+胁迫对桐花树碳代谢相关生理特性的影响，结果表明：桐花树幼苗对Pb2+胁迫的耐受性强，在时间和质量比上，其碳代谢相关生理指标受到Pb2+胁迫的双重影响.桐花树幼苗叶片叶绿素含量和Hill反应活性对外源Pb2+胁迫具有相同的响应趋势.当培养土中Pb2+质量比为500 mg/kg时，桐花树幼苗叶片叶绿素含量和hill反应活性升高；随着Pb2+质量比的升高以及胁迫时间的延长，桐花树幼苗叶片叶绿素含量与Hill反应活性均显著降低.实验还显示，叶绿素a对Pb2+胁迫较叶绿素b更为敏感；Hill反应活性对于Pb2+胁迫的反应比叶绿素含量更为敏感.在500～2 000 mg/kg Pb2+胁迫范围内，淀粉酶活性随胁迫质量比的升高而升高，经Pb2+胁迫处理15 d的样品，其淀粉酶活性总体上高于处理3 d的样品，但当Pb2+质量比达3 000 mg/kg时，淀粉酶的活性则显著下降

Abstract:: Some related physiological characters of the carbohydrate metabolism of Aegiceras corniculatum under Pb2+ stress were researched.The results showed that Aegiceras corniculatum had a strong resistant to Pb2+ stress and the carbohydrate metabolism was affected by both the duration and the concentration of Pb2+ stress.It showed that the activities of Hill reaction and the content of chlorophyll in the seedlings were increased when the Pb2+ concentration in the cultivation soils rose to 500 mg/kg.However,the factors mentioned above showed a significant decrease with a higher Pb2+ concentration as well as a longer duration of the stress.Experiments showed that chlorophyll a was more sensitive than chlorophyll b to Pb2+ stress,and the Hill reaction activity of the plants showed more sensitivity than that of chlorophyll content for the Pb2+ stress.Under the range of 500 ~ 2000 mg·kg-1 Pb2+ stress,amylase activity increased with the Pb2+ concentration.The amylase activity of the samples treated with Pb2+ for 15 days was higher than that of the samples treated for 3 days.However,the amylase activity was significantly decreased when the Pb2+ concentration reached to 3000 mg·kg-1