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      Growth and turion formation of Potamogeton crispus in response to different phosphorus concentrations in water

      Wang, Lei; Yang, Tewu; Zhu, Duanwei; Hamilton, David P.; Nie, Zhongnan; Liu, Liangqing; Wan, Xiaoqiong; Zhu, Congming
      DOI
       10.1007/s10452-012-9427-7
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      Wang, L., Yang, T., Zhu, D., Hamilton, D., Nie, Z., Liu, L., & Zhu, C. (2013). Growth and turion formation of Potamogeton crispus in response to different phosphorus concentrations in water. Aquatic Ecology, 47(1), 87-97.
      Permanent Research Commons link: https://hdl.handle.net/10289/7398
      Abstract
      The vegetative growth and turion formation of Potamogeton crispus, a submersed aquatic macrophyte, was investigated under a range of phosphorus (P) concentrations (0. 025, 0. 25, 2. 5 and 25 mg P L⁻¹) in the ambient water free of algae, aiming to identify the responses of submersed aquatic macrophytes to nutrient enrichment, a common eutrophication problem in China and worldwide. Plant growth was not affected by different P concentrations in terms of biomass accumulation of stems and leaves. However, the contents of chlorophyll a and starch in plants decreased with increasing water P levels, whereas chlorophyll b and carotenoids declined with P level ranging from 0. 025 to 2. 5 mg P L⁻¹. The soluble sugar content decreased when water P concentration increased up to 2. 5 mg L⁻¹. The P content in plants increased with increasing water P levels, whereas plant N content decreased and soluble protein increased when water P concentration increased over 0. 25 mg L⁻¹, implying that P. crispus may have modified its metabolism to adapt to water P availability. When P concentration increased to 25 mg L⁻¹, the number and dry matter production of turions per plant decreased significantly. Meanwhile, there was a significant reduction in turion weight and the accumulations of soluble sugar and starch in turion, when water P concentration was over 0. 25 mg L⁻¹. The results suggest that turion formation in P. crispus is sensitive to P concentration in the ambient water, and high P levels may lead to decreases in P. crispus populations due to the decline in turion production.
      Date
      2013
      Type
      Journal Article
      Publisher
      Springer-Verlag
      Collections
      • Science and Engineering Papers [3122]
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