| Pb^2＋胁迫对桐花树碳代谢相关生理因子的影响 |
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| 引用本文： | 吴世军.Pb^2＋胁迫对桐花树碳代谢相关生理因子的影响[J].厦门水产学院学报,2011(6):413-417. |
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| 作者姓名： | 吴世军 |
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| 作者单位： | 泉州师范学院湿地研究所,福建泉州362000 |
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| 基金项目： | 泉州市科技计划项目（2009Z56） |
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| 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.
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| 关 键 词： | Pb2＋胁迫 碳代谢 叶绿素 淀粉酶 桐花树 |
Effects of Pb^2＋ Stress on Some Physiological Characters of the Carbohydrate Metabolism of Aegiceras corniculatum |
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| Authors: | WU Shi-jun |
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| Institution: | WU Shi-jun(Wetland Institute,Quanzhou Normal University,Quanzhou 362000,China) |
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| 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. |
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| Keywords: | Pb2＋ stress carbohydrate metabolism chlorophyll amylase Aegiceras corniculatum |
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