海洋微藻活性物质对烟草青枯病病原菌抑菌性研究  

Antibacterial Activities of Three Marine Microalgae against Tobacco Wilt Pathogen(Ralstonia solanacearum)

作　　者：李小姣 钟雪峰 杜国英[1] LI Xiao-jiao;ZHONG Xue-feng;DU Guo-ying(College of Marine Life Science,Ocean University of China,Qingdao,Shandong 266003)

机构地区：[1]中国海洋大学海洋生命学院,山东青岛266003

出　　处：《安徽农业科学》2021年第4期131-133,148,共4页Journal of Anhui Agricultural Sciences

基　　金：山东省自然科学基金项目(ZR2011CM018);国家自然科学基金项目(41276137)。

摘　　要：采用杯碟法,选取3种海洋微藻:2种硅藻(小新月菱形藻Nitzschia closterum f.minutissima、三角褐指藻Phaeodactylum tricornutum),1种绿藻(塔胞藻Pyramimonas sp.),测定了其石油醚和85%乙醇提取物对烟草青枯病的抗菌试验。结果表明,塔胞藻的乙醇提取物抑菌性最强,三角褐指藻的石油醚和乙醇提取物、新月菱形藻的石油醚和乙醇提取物也表现出一定的抑菌性,而塔胞藻的石油醚提取物无抑菌活性。该研究为烟草病害生防制剂提供了新资源,也为进一步研究微藻抗菌活性物质奠定了基础。The antibacterial activities against tobacco wilt pathogen(Ralstonia solanacearum)were investigated on petroleum ether and ethanol extracts of three microalgae,two diatoms(Nitzschia closterium f.minutissima and Phaeodactylum tricornutum)and one green microalgae(Pyramimonas sp.).The cup assay method was employed to assess the antibacterial properties.The ethanol extracts from Pyramimonas sp.had the strongest antibacterial activities against tobacco wilt pathogen of all six extracts.The ethanol and petroleum ether extracts from P.tricornutum,and the ethanol and petroleum ether extracts from N.closterium inhibited the growth of pathogen bacteria.The petroleum ether extracts from Pyramimonas sp.did not show bactericidal activity against tobacco wilt pathogen.

关 键 词：海洋微藻 活性物质 烟草青枯病 抑菌性 生物防治 

分 类 号：S482.292[农业科学—农药学]