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Journal of Oceanology and Limnology

, Volume 37, Issue 2, pp 665–674 | Cite as

Antioxidant systems of aquatic macrophytes in three life forms: a case study in Lake Erhai, China

  • Changbo Yuan
  • Tianshun Zhu
  • Te Cao
  • Yilong Xi
  • Xiaolin ZhangEmail author
  • Leyi Ni
Biology
  • 11 Downloads

Abstract

Antioxidant systems are vital in life activities of macrophytes. Species with different life forms need to cope with distinct environments by modifying physiological characters, especially antioxidant systems. In order to find differences among life forms and consequence of lake eutrophication, we studied three antioxidant enzymes activity (superoxide dismutase SOD, ascorbate oxidase APX and catalase CAT) and total soluble phenolics (TP) content in leaves of 26 macrophyte species in September 2013 in Lake Erhai, China. We found that antioxidation varied accordingly with life forms. The activities of SOD and APX in emergent macrophytes (EM) and floating-leaved macrophytes (FM) were much lower than those of submerged macrophytes (SM). On the contrary, TP content was much higher in EM and FM species. There was a negative correlation between TP and antioxidant enzyme activities (CAT and APX). The results suggested that EM and FM species rely on phenolics might to adapt to adverse environments (higher herbivores predation pressure and UV radiation intensity), while SM species more rely on antioxidant enzymes possibly due to lower demand for antioxidation and/or lack of light and inorganic C availability for phenolics synthesis. We also found FM species represent highest fitness in term of antioxidant system, which would lead to overgrowth of FM species and littoral zone bogginess during lake eutrophication. Finally, it is necessary to carry out the verification experiment under the control condition in the later stage, especially for the dominant ones in eutrophic lakes, to understand the exact adaptive mechanisms of them.

Keyword

macrophytes life forms phenolics antioxidant enzymes eutrophication 

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Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Changbo Yuan
    • 1
    • 4
  • Tianshun Zhu
    • 3
    • 4
  • Te Cao
    • 1
    • 2
  • Yilong Xi
    • 2
  • Xiaolin Zhang
    • 1
    • 2
    Email author
  • Leyi Ni
    • 1
    • 2
  1. 1.Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of HydrobiologyChinese Academy of SciencesWuhanChina
  2. 2.Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Anhui Province; College of Life SciencesAnhui Normal UniversityWuhuChina
  3. 3.College of Life SciencesZaozhuang UniversityZaozhuangChina
  4. 4.University of Chinese Academy of SciencesBeijingChina

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