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Removal of nutrients from water column and physiological responses of Vallisneria natans under sulfonamide stress
Journal of Freshwater Ecology ( IF 1.3 ) Pub Date : 2019-01-01 , DOI: 10.1080/02705060.2019.1666037
Houtao Xu 1 , Liming Zhu 2 , Liqing Wang 2 , Xiaoyan Zheng 3 , Linkui Cao 1
Affiliation  

Abstract For a better understanding of the metabolic adaptations to sulfonamide (SA) stress in submerged macrophytes, the alterations of nutrient element uptake and secondary metabolism were studied in the leaves of Vallisneria natans (Lour.) Hara exposed to 0 and 50 mg/L of SA for 15 d. The results showed that, under a treatment of 50 mg/L SA, the malondialdehyde and superoxide anion (O2•−) contents in V. natans leaves significantly increased, 1.77–3.32 times higher than the control group, respectively, while the chlorophyll concentration showed a 36.99% reduction at the end of experiment. Simultaneously, V. natans showed a removal effect on SA and SA dramatically affected the nutrient removal efficiency by V. natans. Our results suggest that high SA levels can damage V. natans tissue and in turn that results in a stimulation of the antioxidant response. V. natans significantly improved the removal efficiency of SA, meanwhile SA resulted in less removal of TN and TP from the water column.

中文翻译:

磺胺胁迫下苦参水体养分去除及生理反应

摘要 为了更好地了解沉水植物对磺胺(SA)胁迫的代谢适应性,研究了在 0 和 50 mg/L 的苦参(Lour.)Hara 叶片中营养元素吸收和次生代谢的变化。 SA 15 天。结果表明,在50 mg/L SA处理下,刺槐叶片中丙二醛和超氧阴离子(O2•−)含量显着增加,分别比对照组高1.77~3.32倍,而叶绿素浓度在实验结束时显示减少了 36.99%。同时,V. natans 对SA 有去除作用,SA 显着影响V. natans 的养分去除效率。我们的结果表明高 SA 水平会损害 V。natans 组织,进而导致抗氧化反应的刺激。V. natans 显着提高了 SA 的去除效率,同时 SA 导致水体中 TN 和 TP 的去除较少。
更新日期:2019-01-01
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