Abstract | Changes of photosynthetic pigment (including chlorophyll a, chlorophyll b and carotenoid) content in leaf,MDA and H2 O2 contents, O2-·production rate, SOD, CAT and POD activities in root and leaf of Typha orientalis Presl were analyzed after stressed by 50μmol·L-1 Pb and 50μmol·L-1 Pb-50μmol·L-1 Cu for 15 d. The results show that under Pb single and Pb-Cu complex stress conditions, chlorophyll a content in leaf of T. orientalis is significantly lower than that of the control, chlorophyll b and carotenoid contents are not significantly different from those of the control;O2 -· production rate and H2 O2 content in root and leaf are generally not significantly different from those of the control, but MDA content is higher or lower than that of the control and the difference is significant. Compared with the control, under Pb single and Pb-Cu complex stress conditions, there are different change rules in SOD, CAT and POD activities in root and leaf. The comprehensive analysis result indicates that T. orientalis has a certain tolerance to 50μmol·L-1 Pb single stress and 50 μmol·L-1Pb-50 μmol·L-1Cu complex stress, but its protection mechanism replying to Pb single and Pb-Cu complex stresses is probably different. |
| 关键词 | 香蒲; Pb 单一胁迫; Pb-Cu 复合胁迫; 光合色素含量; 过氧化伤害; 保护机制 |
| Key words | Typha orientalis Presl; Pb single stress; Pb-Cu complex stress; photosynthetic pigment content; peroxide damage; protection mechanism |
| 作者 | 徐小颖, 徐义昆, 池源, 金银根 |
| 所在单位 | 扬州大学生物科学与技术学院, 江苏扬州225009 |
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| 基金项目 | 国家自然科学基金青年科学基金资助项目(31300324); 江苏省高校自然科学研究面上项目(13KJB180028) |