气候变化领域集成服务门户(CCPortal): Soil chemistry determines whether defensive plant secondary metabolites promote or suppress herbivore growth

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DOI	10.1073/pnas.2109602118
	Soil chemistry determines whether defensive plant secondary metabolites promote or suppress herbivore growth
	Hu L.; Wu Z.; Robert C.A.M.; Ouyang X.; Züst T.; Mestrot A.; Xu J.; Erb M.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:43
英文摘要	Plant secondary (or specialized) metabolites mediate important interactions in both the rhizosphere and the phyllosphere. If and how such compartmentalized functions interact to determine plant–environment interactions is not well understood. Here, we investigated how the dual role of maize benzoxazinoids as leaf defenses and root siderophores shapes the interaction between maize and a major global insect pest, the fall armyworm. We find that benzoxazinoids suppress fall armyworm growth when plants are grown in soils with very low available iron but enhance growth in soils with higher available iron. Manipulation experiments confirm that benzoxazinoids suppress herbivore growth under iron-deficient conditions and in the presence of chelated iron but enhance herbivore growth in the presence of free iron in the growth medium. This reversal of the protective effect of benzoxazinoids is not associated with major changes in plant primary metabolism. Plant defense activation is modulated by the interplay between soil iron and benzoxazinoids but does not explain fall armyworm performance. Instead, increased iron supply to the fall armyworm by benzoxazinoids in the presence of free iron enhances larval performance. This work identifies soil chemistry as a decisive factor for the impact of plant secondary metabolites on herbivore growth. It also demonstrates how the multifunctionality of plant secondary metabolites drives interactions between abiotic and biotic factors, with potential consequences for plant resistance in variable environments. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Benzoxazinoids; Herbivore resistance; Maize; Plant herbivore interactions; Plant secondary metabolites
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238327
作者单位	Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China; Institute of Plant Sciences, University of Bern, Bern, 3013, Switzerland; Institute of Geography, University of Bern, Bern, 3012, Switzerland
推荐引用方式 GB/T 7714	Hu L.,Wu Z.,Robert C.A.M.,et al. Soil chemistry determines whether defensive plant secondary metabolites promote or suppress herbivore growth[J],2021,118(43).
APA	Hu L..,Wu Z..,Robert C.A.M..,Ouyang X..,Züst T..,...&Erb M..(2021).Soil chemistry determines whether defensive plant secondary metabolites promote or suppress herbivore growth.Proceedings of the National Academy of Sciences of the United States of America,118(43).
MLA	Hu L.,et al."Soil chemistry determines whether defensive plant secondary metabolites promote or suppress herbivore growth".Proceedings of the National Academy of Sciences of the United States of America 118.43(2021).