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首页> 外文期刊>Environmental Science and Pollution Research >Effects of epiphytic algae on biomass and physiology of Myriophyllum spicatum L. with the increase of nitrogen and phosphorus availability in the water body
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Effects of epiphytic algae on biomass and physiology of Myriophyllum spicatum L. with the increase of nitrogen and phosphorus availability in the water body

机译：果皮藻类对肌球球菌霉菌菌染色体生物量和生理学的影响。水体中氮和磷可用性的增加

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摘要

The disappearance of submerged vascular macrophytes in shallow eutrophic lakes is a common phenomenon in the world. To explore the mechanism of the decline in submerged macrophyte abundance due to the growth of epiphytic algae along a nutrient gradient in eutrophic water, a 2 x 3 factorial experiment was performed over 4 weeks with the submerged macrophyte (Myriophyllum spicatum L.) by determining the plant's biomass and some physiological indexes, such as chlorophyll (Chl) content, malondialdehyde (MDA) content, and superoxide dismutase (SOD) activity in the leaves of M. spicatum L. on days 7, 14, 21, and 28, which are based on three groups of nitrogen and phosphorus levels in the water body (N-P [mg L-1]: NP1 0.5-0.05, NP2 2.5-0.25, NP3 4.5-0.45) and two levels of epiphytic algae (the epiphytic algae group and the control group). Epiphytic algal biomass was also assayed. The results indicated that epiphytic algal biomass remarkably enhanced in the course of the experiment with elevated levels of nitrogen and phosphorus in the water. Under the same level of nutrient condition, plants' biomass accumulation and Chl content were higher in the control group than that in the epiphytic algae group, respectively, while MDA content and SOD activity in the former were lower than that in the latter. The influences of epiphytic algae on the biomass accumulation and Chl content and MDA content became greater and greater with elevated levels of nutrients. In general, in this experiment, water nutrients promoted the growth of both epiphytic algae and submerged plants, while the growth of epiphytic algae hindered submerged macrophytes' growth by reducing Chl content and promoting peroxidation of membrane lipids in plants.
机译：浅养殖湖中淹没血管型巨乳的消失是世界上常见的现象。为了探讨潜水宏观物质丰富的机制，由于富营养水中营养梯度的果实藻类生长，2×3因子试验用浸没式宏粒（Myriophyllum Spicatum L.）进行了4周，通过确定了植物的生物质和一些生理指标，如叶绿素（CHL）含量，丙二醛（MDA）含量和M. Spicatum L.的叶片中的超氧化物歧化酶（SOD）活性，在第7,14,21和28天，这是基于水体中的三组氮和磷水平（NP [Mg L-1]：NP1 0.5-0.05，NP2 2.5-0.25，NP3 4.5-0.45）和两种含有两水平的果皮藻（Ebipyctic Algae组）控制组）。切片藻类生物量也被测定。结果表明，在实验过程中，现成的藻类生物量显着增强了水中水平升高的水平。在相同水平的营养状况下，对照组植物的生物质积累和CHL含量分别比果皮藻类组中的含量高，而前者的MDA含量和SOD活性低于后者。果实藻类对生物质积累和CHL含量和MDA含量的影响变得越来越大，营养水平升高。一般来说，在该实验中，水营养促进了果实藻类和浸没植物的生长，而现源性藻类的生长是通过降低CHL含量和促进植物膜脂质的过氧化来增长浸没的宏细胞的生长。

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