| 太湖典型沉水植物生理指标对水质的响应 |
| 摘要点击 1634 全文点击 1061 投稿时间：2016-02-26 修订日期：2016-07-07 |
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| 中文关键词 水质 马来眼子菜 菹草 生理 相关分析 |
| 英文关键词 water quality Potamogeton wrightii Morong Potamogeton crispus L. physiology correlation analysis |
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| 中文摘要 |
| 沉水植物叶片生理指标能指示水质变化，为了弄清二者间的相关关系，本文采用原位监测与室内分析相结合的方法，研究了太湖不同营养条件下马来眼子菜（Potamogeton wrightii Morong）和菹草（Potamogeton crispus L.）叶片中叶绿素、游离脯氨酸（PRO）含量以及过氧化物酶（POD）活性的差异. 结果表明：①马来眼子菜与菹草分布区水体的理化因子、综合营养指数（TLI）存在显著差异，马来眼子菜主要分布于中营养水体，菹草则分布在富营养水体；②马来眼子菜与菹草叶片内叶绿素a+b含量、叶绿素a/b、POD活性及PRO含量在其各自分布的湖区间差异显著，且叶绿素a+b含量、POD活性均与TLI呈显著相关；③水体透明度、营养盐（氮、磷）是引起马来眼子菜与菹草叶片内叶绿素含量、POD活性变化的重要因素. 本实验说明，马来眼子菜、菹草叶片的生理变化特征受到水体营养状态及理化性质支配. |
| 英文摘要 |
| It was well known that physiological indices of submerged macrophytes could reflect change of water quality. The correlation between physiological indices of submerged macrophytes and change of water quality was studied under the cooperation of in-situ monitoring and lab analysis, combined with measuring Chlorophyll and free proline (PRO) contents as well as peroxidase (POD) activities in the leaves of Potamogeton wrightii Morong and Potamogeton crispus L. under different water quality and nutrition status. The results showed: ①there were significant spatial differences among water factors and the comprehensive eutrophication index (TLI) of distribution areas of Potamogeton wrightii Morong and Potamogeton crispus L. Mesotrophic water was more suitable for the growth of Potamogeton wrightii Morong, while Potamogeton crispus L. grew well in eutrophic water. ②there were significant spatial differences among physiological indices of Potamogeton wrightii Morong and Potamogeton crispus L. in Taihu Lake. Besides, there were significant relationships between Chlorophyll contents, POD activities of two species and TLI. ③water transparency as well as nitrogen and phosphorus nutrition were important factors leading to changes in Chlorophyll contents and POD activities of Potamogeton wrightii Morong and Potamogeton crispus L.. The findings from this study indicate that physiological properties of Potamogeton wrightii Morong and Potamogeton crispus L. have a very close correlation with nutrition status and physiochemical properties of water. |
