DOI: 10.1002/ajb2.1404
论文题名: Resilience to multiple stressors in an aquatic plant and its microbiome
作者: O'Brien A.M. ; Yu Z.H. ; Luo D.-Y. ; Laurich J. ; Passeport E. ; Frederickson M.E.
刊名: American Journal of Botany
ISSN: 29122
出版年: 2020
卷: 107, 期: 2 语种: 英语
英文关键词: benzotriazole
; biotransformation
; duckweed
; freshwater salinization
; Lemna minor
; Lemnaceae
; rhizosphere
; species interactions
; stress
; urban pollution
Scopus关键词: anthropogenic effect
; aquatic plant
; biotransformation
; climate change
; concentration (composition)
; ecosystem resilience
; environmental change
; environmental stress
; freshwater ecosystem
; genotype
; global change
; microorganism
; mutualism
; rhizosphere
; salinization
; urban pollution
; weed
; Araceae
; Lemna
; Lemna minor
英文摘要: Premise: Outcomes of species interactions, especially mutualisms, are notoriously dependent on environmental context, and environments are changing rapidly. Studies have investigated how mutualisms respond to or ameliorate anthropogenic environmental changes, but most have focused on nutrient pollution or climate change and tested stressors one at a time. Relatively little is known about how mutualisms may be altered by or buffer the effects of multiple chemical contaminants, which differ fundamentally from nutrient or climate stressors and are especially widespread in aquatic habitats. Methods: We investigated the impacts of two contaminants on interactions between the duckweed Lemna minor and its microbiome. Sodium chloride (salt) and benzotriazole (a corrosion inhibitor) often co-occur in runoff to water bodies where duckweeds reside. We tested three L. minor genotypes with and without the culturable portion of their microbiome across field-realistic gradients of salt (3 levels) and benzotriazole (4 levels) in a fully factorial experiment (24 treatments, tested on each genotype) and measured plant and microbial growth. Results: Stressors had conditional effects. Salt decreased both plant and microbial growth and decreased plant survival more as benzotriazole concentrations increased. In contrast, benzotriazole did not affect microbial abundance and even benefited plants when salt and microbes were absent, perhaps due to biotransformation into growth-promoting compounds. Microbes did not ameliorate duckweed stressors; microbial inoculation increased plant growth, but not at high salt concentrations. Conclusions: Our results suggest that multiple stressors matter when predicting responses of mutualisms to global change and that beneficial microbes may not always buffer hosts against stress. © 2019 Botanical Society of America
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159470
Appears in Collections: 气候变化与战略
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作者单位: Department of Ecology and Evolutionary Biology, University of Toronto, Canada; Department of Chemical Engineering and Applied Chemistry, University of Toronto, Canada; Department of Civil and Mineral Engineering, University of Toronto, Canada
Recommended Citation:
O'Brien A.M.,Yu Z.H.,Luo D.-Y.,et al. Resilience to multiple stressors in an aquatic plant and its microbiome[J]. American Journal of Botany,2020-01-01,107(2)