川蔓藻对两种常见浮游藻类的化感作用

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Abstract

One submerged macrophyte (Ruppia maritima) and two algae (Chlorella vulgaris and Microcystis aeruginosa) were selected to test the allelopathic effect of submerged macrophyte on algae. The parameters including optical density, chlorophyll a, maximum photochemical quantum yield, relative electron transport rate, soluble sugar, malondialdehyde, and superoxide dismutase activity were measured for three co-culture treatments of Ruppia maritima + Chlorella vulgaris, Ruppia maritima + Microcystis aeruginosa, and Ruppia maritima + mixture of Chlorella vulgaris and Microcystis aeruginosa (V:V=1:1). The growth of Chlorella vulgaris, Microcystis aeruginosa and mixed algae were rapidly and greatly inhibited with the presence of Ruppia maritima. The inhibition rates in the three treatments reached the maximums on the 6th day, which were 80.95%, 94.18% and 94.01%, respectively. The values of optical density, chlorophyll a, soluble sugar and maximum photochemical quantum yield for the three treatments were lower than those for the corresponding controls, and showed a significantly downward trend with time, indicating that the photosynthetic capacity of the treatments became weakening gradually. However, the values of malondialdehyde and superoxide dismutase of the treatments were higher than those of the corresponding controls for the first six days, indicating the possible occurrence of the membrane peroxidation of the algae.

Key words： Ruppia maritima Chlorella vulgaris Microcystis aeruginosa allelopathic effect

Received: 21 September 2018

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X524

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	ZHANG Xin
	LU Xue-qiang
	WANG Lan
	HAN Xiao-xin
	MAO Hai-yan

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ZHANG Xin,LU Xue-qiang,WANG Lan等. Allelopathic effect of Ruppia maritima on Chlorella vulgaris and Microcystis aeruginosa[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(4): 1589-1595.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I4/1589

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