| 武淑文,侯磊,洪子萌,范黎明,叶敏.阿特拉津胁迫下外源磷对香蒲磷吸收和抗氧化酶系统的影响[J].农业环境科学学报,2021,40(4):844-851. |
| 阿特拉津胁迫下外源磷对香蒲磷吸收和抗氧化酶系统的影响 |
| Effect of exogenous phosphorus addition on phosphorus absorption and the antioxidase system of Typha angustifolia under different levels of atrazine stress |
| 投稿时间：2020-09-15 |
| DOI：10.11654/jaes.2020-1075 |
| 中文关键词: 阿特拉津 磷酸二氢铵 磷吸收 香蒲 抗氧化酶系统 |
| 英文关键词: atrazine NH4H2PO4 phosphorus uptake Typha angustifolia antioxidase system |
| 基金项目:云南省高校土壤侵蚀与控制重点实验室（云教科（2016）37号）；国家自然科学资金项目（21607120） |
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| 中文摘要: |
| 为探明阿特拉津和外源磷对水生植物磷吸收及抗氧化酶系统影响的复合效应，选取典型的湿地植物香蒲（Typha angustifolia L.）为供试植物，采用水培实验，研究阿特拉津（0、0.5、2 mg·L-1和5 mg·L-1）和外源磷（0.5、4 mg·L-1和10 mg·L-1）交互作用对香蒲体内磷含量、叶绿素含量以及抗氧化酶活性的影响。结果表明：阿特拉津胁迫下，外源磷相较于对照显著提高了香蒲地上（310.47%）和地下部（165.81%）平均磷含量；中低浓度（0.5 mg·L-1与2 mg·L-1）阿特拉津处理下，随着外源磷浓度增加，叶绿素a、叶绿素b含量升高，过氧化氢酶（CAT）及谷胱甘肽（GSH）活性增强，丙二醛（MDA）含量则显著降低；高浓度阿特拉津（5 mg·L-1）处理下，外源磷降低了叶绿素a、叶绿素b含量及超氧化物歧化酶（SOD）、CAT、GSH活性，却提高了MDA的积累。因此，中低浓度阿特拉津胁迫下外源磷能够提高香蒲体内磷含量、叶绿素含量及抗氧化酶系统活性，而高浓度阿特拉津与外源磷的复合效应表现为协同抑制，研究结果有助于理解阿特拉津胁迫与外源磷交互作用下水生植物响应的生理生化机制。 |
| 英文摘要: |
| This study aimed to expound the interactive effects of atrazine and exogenous phosphorus input on the phosphorus uptake and antioxidase system of hydrophytes. A typical aquatic plant Typha angustifolia L. was employed in a hydroponic experiment to determine the combined effects of atrazine(0, 0.5, 2.0, and 5.0 mg·L-1) and exogenous phosphorus(0.5, 4.0, and 10.0 mg·L-1) on the phosphorus content, chlorophyll content, and antioxidase activities. Compared with that of the control treatment, exogenous phosphorus addition significantly increased the average phosphorus concentration in the above-ground(310.47%) and below-ground(165.81%) parts of Typha angustifolia under atrazine stress. Under low(0.5 mg·L-1) and medium(2.0 mg·L-1) levels of atrazine, the contents of chlorophyll a and chlorophyll b and the activities of catalase(CAT) and glutathione(GSH) increased, but the MDA concentration decreased with the increase in exogenous phosphorus input. In contrast, the increased exogenous phosphorus concentration reduced the chlorophyll contents and the activities of superoxide dismutase, CAT, and GSH, whereas the MDA contents increased under the high level(5 mg·L-1) of atrazine. The results suggest that exogenous phosphorus can have a positive effect on the phosphorus uptake, chlorophyll content, and antioxidase activity under low and medium levels of atrazine stress, but a negative effect under the high level of atrazine stress. Thus, this study can help to explain the physio-biochemical mechanism of aquatic plants in response to the interactions between atrazine stress and exogenous phosphorus input. |
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