Effects of physiological integration on defense strategies against herbivory by the clonal plant Alternanthera philoxeroides  

作　　者：Rubén Portela Bi-Cheng Dong Fei-Hai Yu Rodolfo Barreiro Sergio R.Roiloa 

机构地区：[1]BioCost Group,Biology Department,Universidade da Coruña,A Coruña 15071,Spain [2]School of Nature Conservation,Beijing Forestry University,Beijing 100083,China [3]Institute of Wetland Ecology&Clone Ecology/Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation,Taizhou University,Taizhou 318000,China

出　　处：《Journal of Plant Ecology》2019年第4期662-672,共11页植物生态学报（英文版）

基　　金：This research was supported by the National Key Resecarch and Development Program of China(2016YFC1201100);NSFC(31570413,31500331)to F.H.Y.and B.C.D.S.R.R.;R.B.and R.P.acknowledge funding from the Spanish Ministry of Economy and Competitiveness(project Ref.CGL2013-44519-R,cofinanced by the European Regional Development Fund,ERDF);This is a contribution from the Alien Species Network(Ref.ED431D 2017/20-Xunta de Galicia,Autonomous Government of Galicia).

摘　　要：Aims The plant-herbivore interaction is one of the most fundamental inter-actions in nature.Plants are sessile organisms,and consequently rely on particular strategies to avoid or reduce the negative impact of herbivory.Here,we aimed to determine the defense strategies against insect herbivores in the creeping invasive plant Alternanthera philoxeroides.Methods We tested the defense response of A.philoxeroides to herbivory by a leaf-feeding specialist insect Agasicles hygrophila and a pol-yphagous sap-feeding insect Planococcus minor.We also tested the mechanisms triggering defense responses of A.philoxeroides by including treatments of artificial leaf removal and jasmonic acid application.Furthermore,we examined the effect of physiological integration on these defense strategies.Important Findings The combination of artificial leaf removal and jasmonic acid appli-cation produced a similar effect to that of leaf-feeding by the real herbivore.Physiological integration influenced the defense strat-egies of A.philoxeroides against herbivores,and increased biomass allocation to aboveground parts in its apical ramets damaged by real herbivores.Our study highlights the importance of physio-logical integration and modular plasticity for understanding the consequences of herbivory in clonal plants.

关 键 词：Agasicles hygrophila alligator weed clonal integration HERBIVORY Planococcus minor 

分 类 号：Q96[生物学—昆虫学]