DOI: 10.1111/ele.13537
论文题名: Sick plants in grassland communities: a growth-defense trade-off is the main driver of fungal pathogen abundance
作者: Cappelli S.L. ; Pichon N.A. ; Kempel A. ; Allan E.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2020
卷: 23, 期: 9 起始页码: 1349
结束页码: 1359
语种: 英语
中文关键词: Biodiversity experiment
; functional traits
; fungal exclusion experiment
; fungal pathogen
; growth-defense trade-off
; nitrogen enrichment
英文关键词: biodiversity
; biomass
; fungus
; grassland
; plant
; Biodiversity
; Biomass
; Fungi
; Grassland
; Plants
英文摘要: Aboveground fungal pathogens can substantially reduce biomass production in grasslands. However, we lack a mechanistic understanding of the drivers of fungal pathogen infection and impact. Using a grassland global change and biodiversity experiment we show that the trade-off between plant growth and defense is the main determinant of infection incidence. In contrast, nitrogen addition only indirectly increased incidence via shifting plant communities towards faster growing species. Plant diversity did not decrease incidence, likely because spillover of generalist pathogens or dominance of susceptible plants counteracted negative diversity effects. A fungicide treatment increased plant biomass production and high levels of infection incidence were associated with reduced biomass. However, pathogen impact was context dependent and infection incidence reduced biomass more strongly in diverse communities. Our results show that a growth-defense trade-off is the key driver of pathogen incidence, but pathogen impact is determined by several mechanisms and may depend on pathogen community composition. © 2020 John Wiley & Sons Ltd/CNRS Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166600
Appears in Collections: 气候变化与战略
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作者单位: Institute of Plant Sciences, University of Bern, Altenbergrain 21, Bern, 3013, Switzerland
Recommended Citation:
Cappelli S.L.,Pichon N.A.,Kempel A.,et al. Sick plants in grassland communities: a growth-defense trade-off is the main driver of fungal pathogen abundance[J]. Ecology Letters,2020-01-01,23(9)