Parasite-host network analysis provides insights into the evolution of two mistletoe lineages(Loranthaceae and Santalaceae)  

作　　者：Jin Zhao Yuanjie Li Xuanni Wang Manru Li Wenbin Yu Jin Chen Ling Zhang 

机构地区：[1]CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,Yunnan,China [2]Engineering Research Center of Eco-environment in Three Gorges Reservoir Region,Ministry of Education,China Three Gorges University,Yichang 443002,Hubei,China [3]Graduate School of the Chinese Academy of Sciences,Beijing 100049,China [4]Linnaeus Labs Technology Co.,Ltd,Wuyuan 333200,Jiangxi,China

出　　处：《Plant Diversity》2023年第6期702-711,共10页植物多样性（英文版）

基　　金：This study was financially supported by the National Natural Science Foundation of China(Grant No.31670393 and 32270310).

摘　　要：Mistletoes are ecologically important parasitic plants,with> 1600 species from five lineages worldwide.Mistletoe lineages exhibit distinct patterns of species diversification and host specificity,however,the mechanisms underlying these differences are poorly understood.In this study,we analysed a comprehensive parasite-host network,including 280 host species from 60 families and 22 mistletoe species from two lineages(Santalaceae and Loranthaceae) in Xishuangbanna,located in a biodiversity hotspot of tropical Asia.We identified the factors that predict the infection strength of mistletoes.We also detected host specificity and the phylogenetic signal of mistletoes and their hosts.We found that this interaction network could be largely explained by a model based on the relative abundance of species.Host infection was positively correlated with diameter at breast height and tree coverage,but negatively correlated with wood density.Overall,closely related mistletoe species tend to interact more often with similar hosts.However,the two lineages showed a significantly different network pattern.Rates of host generality were higher in Loranthaceae than in Santalaceae,although neither lineage showed phylogenetic signal for host generality.This study demonstrates that the neutral interaction hypothesis provides suitable predictions of the mistletoe-host interaction network,and mistletoe species show significant phylogenetic signals for their hosts.Our findings also indicate that high species diversification in Loranthaceae may be explained by high rates of host generality and the evolutionary history shared by Loranthaceae species with diverse host plants in the tropics.

关 键 词：LORANTHACEAE Mistletoeehost interaction Neutral interaction hypothesis Parasiteehost network SANTALACEAE 

分 类 号：Q948[生物学—植物学]