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科研人员发现4种虫生真菌

[日期:2021-09-01]   来源:广西昆虫馆  作者:广西昆虫馆   阅读:34次[字体: ]

Insight into the Systematics of Novel Entomopathogenic Fungi Associated with Armored Scale Insect, Kuwanaspis howardi (Hemiptera: Diaspididae) in China

Xiu-Lan Xu, Qian Zeng, Yi-Cong Lv, Rajesh Jeewon, Sajeewa S. N. Maharachchikumbura, Dhanushka N. Wanasinghe, Kevin D. Hyde, Qian-Gang Xiao, Ying-Gao Liu, Chun-Lin Yang
       
两种真菌的形态解剖图 四川农业大学林学院供图
       近日,四川农业大学林学院教授刘应高团队的研究成果在线发表在真菌学类期刊《真菌学杂志》(Journal of Fungi)上。
       虫生真菌(Entomogenous fungi)一般指生活于昆虫或其他节肢动物身上的一类特殊生态类群,这类真菌因引起虫体病变或死亡,以及尸虫丰富的活性因子和营养成分而备受科研人员关注,领域涉及食品、医药、保健、生物农药等方面。据记载,中国虫生真菌记录有400种以上。
       鉴于此,该学院科研人员在川内广泛采集虫生真菌标本,运用形态解剖特征和分子演化分析,在水竹和苦竹上的贺氏线盾蚧(Kuwanaspis howardi (Cooley))上发现4种虫生真菌,即Podonectria kuwanaspidis X.L. Xu & C.L. Yang sp. nov.、P. novae-zelandiae Dingley、P. sichuanensis C.L. Yang & X.L. Xu、Microcera kuwanaspidis X.L. Xu & C.L. Yang sp. nov.,其中包括2个新种和1个新纪录种。
       研究结果有助于科研人员认识与掌握四川省的虫生真菌资源现状,为该类生物资源的开发与有效利用奠定了生物学基础。
来源:中国科学报 张晴丹
 
Abstract
This study led to the discovery of three entomopathogenic fungi associated with Kuwanaspis howardi, a scale insect on Phyllostachys heteroclada (fishscale bamboo) and Pleioblastus amarus (bitter bamboo) in China. Two of these species belong to Podonectria: P. kuwanaspidis X.L. Xu & C.L. Yang sp. nov. and P. novae-zelandiae Dingley. The new species P. kuwanaspidis has wider and thicker setae, longer and wider asci, longer ascospores, and more septa as compared with similar Podonectria species. The morphs of extant species P. novae-zelandiae is confirmed based on sexual and asexual morphologies. Maximum likelihood and Bayesian inference analyses of ITS, LSU, SSU, tef1-α, and rpb2 sequence data provide further evidence for the validity of the two species and their placement in Podonectriaceae (Pleosporales). The second new species, Microcera kuwanaspidis X.L. Xu & C.L. Yang sp. nov., is established based on DNA sequence data from ITS, LSU, SSU, tef1-α, rpb1, rpb2, acl1, act, cmdA, and his3 gene regions, and it is characterized by morphological differences in septum numbers and single conidial mass.

 

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