Research on algicidal effect of bioactive metabolites of Brevibacillus laterosporus on Oscillatoria sp.in shrimp pond

Q4 Environmental Science 水产学报 Pub Date : 2013-01-01 DOI:10.3724/SP.J.1231.2013.38269
W. Jia, Xianghu Huang, Changling Li, Jia-hui Zhang
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引用次数: 2

Abstract

Oscillatoria sp.is a common and harmful cyanophyte in shrimp culture pond.In this study,the sterile filtrate of Brevibacillus laterosporus and Oscillatoria sp.were used to study the algicidal effects in their different growth stages.The algae dry weight,chlorophyll-a and phycocyanin content were measured in order to explore the best algae-lysing period and the algicidal mechanism.The final aim was to provide the basic theory for improving water environment in shrimp pond.The results showed that algicidal effects of the sterile filtrate on Oscillatoria sp.were very significant(P0.01)when the algae-lysing bacteria was in the stable and decline phases.After 7 days,the algae dry weights were reduced by 51.77%,47.04% respectively,the contents of chlorophyll-a were decreased by 67.60%,59.13% respectively;the phycocyanin contents were increased by 33.51%,30.97%,respectively.Similarly,the algicidal effect of the sterile filtrate of algae-lysing bacteria was so conspicuous(P0.01)on the lag phase Oscillatoria sp..7 days later,the algae dry weight was reduced by 63.90%;the content of chlorophyll-a was decreased by 69.72%;the phycocyanin content was increased by 54.17%.The conclusion was that the sterile filtrate of Brevibacillus laterosporus in the stable phase had the best algicidal effect on the lag phase Oscillatoria sp..
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后芽孢短杆菌生物活性代谢物对虾池中振荡藻的杀藻效果研究
振荡藻是对虾养殖池中常见的有害蓝藻。本研究以短芽孢杆菌(Brevibacillus laterosporus)和振荡芽孢杆菌(Oscillatoria sp.)的无菌滤液为材料,研究了它们在不同生长阶段的杀藻效果。通过测定藻类干重、叶绿素-a和藻蓝蛋白含量,探索最佳的溶藻期和杀藻机理。最终目的是为改善虾塘水环境提供理论依据。结果表明,当溶藻菌处于稳定期和衰退期时,无菌滤液对振荡菌的杀藻效果极显著(P0.01)。处理7 d后,藻类干重分别降低了51.77%、47.04%,叶绿素a含量分别降低了67.60%、59.13%,藻蓝蛋白含量分别提高了33.51%、30.97%。同样,溶藻菌无菌滤液对滞相振荡菌的杀藻效果也非常显著(P0.01)。7 d后,藻类干重降低63.90%,叶绿素-a含量降低69.72%,藻蓝蛋白含量提高54.17%。结果表明,稳定期后芽孢短杆菌无菌滤液对滞后期振荡菌的杀藻效果最好。
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来源期刊
水产学报
水产学报 Environmental Science-Management, Monitoring, Policy and Law
CiteScore
1.40
自引率
0.00%
发文量
5213
期刊介绍: "Fisheries of" mainly reflects the results of scientific research and development of the direction of aquaculture for domestic and foreign academic exchanges Fisheries Service. Mainly basic research published in Fisheries, aquaculture and proliferation of fishing waters environmental protection, preservation of aquatic products processing and utilization, fishing equipment, and other aspects of mechanical papers, research briefings and reviewed.
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