Trichoderma metabolites trigger aggregation behavior in Formosan subterranean termites (Coptotermes formosanus)  

作　　者：Lang Zhang Cong Yi Chengju Du Chao Wen Zhiqiang Li Yong Chen Xiujun Wen Cai Wang 

机构地区：[1]College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,China [2]School of Grassland Science,Beijing Forestry University,Beijing,China [3]Guangdong Key Laboratory of Animal Conservation and Resource Utilization,Guangdong Public Laboratory of Wild Animal Conservation and Utilization,Institute of Zoology,Guangdong Academy of Sciences,Guangzhou,China

出　　处：《Insect Science》2023年第6期1759-1772,共14页昆虫科学（英文版）

基　　金：funded by the National Natural Science Foundation of China(Grant No.31500530).

摘　　要：Our previous studies have shown that some Trichoderma fungi trigger aggregation behavior in Formosan subterranean termites,Coptotermes formosanus Shiraki.However,the mechanisms underlying the induction of termite aggregation by Trichoderma fungi remain unclear.Here,we found that the aqueous or acetone extract of Trichoderma asperellum Samuels,Lieckfeldt&Nirenberg and Trichoderma virens Pers.ex Fries isolated from the gut or cuticle of C.formosanus elicited significant termite aggregation in 2-choice tests.We then screened 9 Trichoderma metabolites(3-acetoxy-2-butanone,phenol,3-ethoxypropionic acid,ethyl 2,4-dioxovalerate,diglycolic acid,d-valine,styrene,3-aminopyridine,and hexyl acetoacetate)that triggered termite aggregation.Among them,phenol(1000μg/mL),3-ethoxypropionic acid(10μg/mL),ethyl 2,4-dioxovalerate(1000μg/mL),and diglycolic acid(1000μg/mL)showed the strongest activities,triggering termite aggregation throughout the 24-h period.As T.asperellum and T.virens produce different metabolites that trigger aggregation behavior in termites,the mechanisms underlying the interaction between subterranean termites and Trichoderma fungi likely vary.Future studies are needed to test whether these chemicals can attract termites and increase bait consumption.

关 键 词：aggregation behavior insect-fungus interaction SEMIOCHEMICAL subter-ranean termite TRICHODERMA 

分 类 号：Q96[生物学—昆虫学]