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首页> 外文期刊>International Journal of Phytoremediation >Brackish Eutrophic Water Treatment by Iris pseudacorus L.-Planted Microcosms: Physiological Responses of Iris pseudacorus L. to Salinity
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Brackish Eutrophic Water Treatment by Iris pseudacorus L.-Planted Microcosms: Physiological Responses of Iris pseudacorus L. to Salinity

机译：假鸢尾种植的缩微微咸水富营养化水处理：假鸢尾对盐度的生理响应

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摘要

Iris pseudacorus L. has been widely used in aquatic ecosystem to remove nutrient and has achieved positive effects. However, little is known regarding the nutrient-removal performance and physiological responses of I. pseudacorus for brackish eutrophic water treatment due to high nutrients combined with certain salinity levels. In this study, I. pseudacorus-planted microcosms were established to evaluate the capacity of I. pseudacorus to remove excessive nutrients from fresh (salinity 0.05%) and brackish (salinity 0.5%) eutrophic waters. The degradation of total nitrogen and ammonia nitrogen were not affected by 0.5% salinity; 0.5% salinity promoted the degradation of nitrate nitrogen while severely inhibited the degradation of total phosphorus. Additionally, 0.5% salinity was found to induce stress responses quantified by measuring six physiological indexes. Compared to 0.05% salinity, 0.5% salinity resulted in significant decreases in the chlorophyll a, b and total chlorophyll contents of I. pseudacorus which closely related to photosynthesis (p < 0.05). Furthermore, the higher proline, malondialdehyde contents and antioxidant enzyme activities were detected in I. pseudacorus exposed to 0.5% salinity, which provided protection against reactive oxygen species. The results highlight that the cellular stress assays are efficient for monitoring the health of I. pseudacorus in salinity shock-associated constructed wetlands.
机译：鸢尾鸢尾（Iris pseudacorus L.）已被广泛用于水生生态系统中以去除营养，并取得了积极的效果。然而，由于高养分和一定的盐度水平，对于咸淡水富营养化处理的假单胞菌的养分去除性能和生理反应知之甚少。在这项研究中，建立了假单胞菌种植的微观世界，以评估假单胞菌从淡水（盐度为0.05％）和咸淡水（盐度为0.5％）中去除过量营养的能力。总氮和氨氮的降解不受0.5％盐度的影响; 0.5％的盐度促进硝酸盐氮的降解，而严重抑制总磷的降解。此外，发现0.5％的盐度可诱导通过测量六个生理指标量化的应激反应。与0.05％的盐度相比，0.5％的盐度导致假单胞菌叶绿素a，b和总叶绿素含量显着下降，这与光合作用密切相关（p <0.05）。此外，在暴露于0.5％盐度的假单胞菌中检测到更高的脯氨酸，丙二醛含量和抗氧化酶活性，从而提供了针对活性氧的保护。结果表明，细胞应激试验可有效监测盐度休克相关人工湿地中假单胞菌的健康。

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