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ORIGINAL ARTICLE
Year : 2010  |  Volume : 6  |  Issue : 23  |  Page : 159-165

Screening of molluscicidal strain against Oncomelania hupensis from the rhizosphere of medicinal plant Phytolacca acinosa Roxb


1 College of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu; College of Life Science and Technology, Henan Institute of Science and Technology, Henan, China
2 College of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu, China

Correspondence Address:
Jun Chen
College of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0973-1296.66928

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The research aimed to screen and exploit molluscicidal microorganisms against Oncomelania hupensis, from the rhizosphere of medicinal plant, Phytolacca acinosa Roxb., and one strain named as SL-30 was obtained with excellent molluscicidal activity. The freeze-dried powder of exocellular broth (EXB) of SL-30 could kill 100% of snails at a concentration of 48 mg/l for a submerged period of 24 h, with stabile molluscicidal activity at a temperature lower than 60C; furthermore, it could be gradually degraded after exposure to illumination for 15 days. The freeze-dried powder of SL-30's EXB was safe to fresh fish and shrimp, even at a concentration beyond LC 90 of 24-h exposure period. The glycogen and total protein content of soft tissues of snails decreased after treating with SL-30's EXB, and glycogen content's decreasing rate had a linear relationship with molluscicidal activity. Finally, phylogenetic analysis based on ITS sequence showed that strain SL-30 had a higher similarity to Aspergillus fumigatus with bootstrap value 98%; accordingly, it was identified as a species of Aspergillus.


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