Allelopathic effect of the rice straw aqueous extract on the growth of Microcystis aeruginosa
Allelopathic effect of the rice straw aqueous extract on the growth of Microcystis aeruginosa
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稻草水提取物对铜绿微囊藻生长的化感作用
DOI：
10.1016/j.ecoenv.2017.11.049
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发表时间：
2018-02-01
影响因子：
6.8
通讯作者：
Wang, Qing-peng
中科院分区：
文献类型：
--
作者：
Hua, Quan;Liu, Yun-guo;Wang, Qing-peng
随着有害藻华防治实用技术的探索和发展，铜绿微囊藻水华已成为水资源保护领域亟待解决的问题。化感作用杀藻剂因其独特、高效的特性而被认为是抑制赤潮的潜在自然资源。此前，水稻的化感作用受到了人们的极大关注，但大多集中在除草剂对杂草的抑制上。本文研究了不同浓度的稻草水提物对藻细胞的处理效果。建立了连续培养体系，结果表明，L-1稻草水提物在4.0g~10.0g范围内对藻细胞的生长有明显的抑制作用，且呈浓度依赖关系。处理9d后，藻细胞代谢活性衰退，最大抑制率可达98%，几乎没有藻类生长。在排除营养元素干扰的情况下，这些结果证实了稻草水提物可以起到抑菌剂的作用。
With the exploration and development of the practical technology for prevention and control of harmful algae blooms (HABs), cyanobacterium Microcystis aeruginosa (M. aeruginosa) blooms have been an urgent problem in the area of water resources protection. Allelopathic algicides are regarded as potential natural resources to constrain HABs for their exclusive and efficient characteristics. Previously, the allelopathic effect of rice has received great attention, but most of them are focused on herbicides to inhibit barnyard grass. In the present study, the effect of algal cells treatment with different concentrations of the rice straw aqueous extract were tested. A continuous culture system was established and the results suggested that the doses of rice straw aqueous extract in the range from 4.0 to 10.0 g L-1 observably suppressed the growth of algae cells in a concentration-dependent way. After 9 days of treatment, the algae cells' metabolic activity decayed and the largest inhibition rate could be up to 98%, almost no algae growth was observed. In the case of eliminate the interference of nutrient elements, these results confirmed that rice straw aqueous extract may act as an algistatic agent.