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Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress

Plants are routinely subjected simultaneously to different abiotic and biotic stresses, such as heat, drought, and insect infestation. Plant–insect interactions in such complex stress situations are poorly understood. We evaluated the performance of the grain aphid (Sitobion avenae) in wheat (Tritic...

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Autores principales: Xie, Haicui, Shi, Jianqin, Shi, Fengyu, Xu, Haiyun, He, Kanglai, Wang, Zhenying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7210778/
https://www.ncbi.nlm.nih.gov/pubmed/31943041
http://dx.doi.org/10.1093/jxb/eraa017
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author Xie, Haicui
Shi, Jianqin
Shi, Fengyu
Xu, Haiyun
He, Kanglai
Wang, Zhenying
author_facet Xie, Haicui
Shi, Jianqin
Shi, Fengyu
Xu, Haiyun
He, Kanglai
Wang, Zhenying
author_sort Xie, Haicui
collection PubMed
description Plants are routinely subjected simultaneously to different abiotic and biotic stresses, such as heat, drought, and insect infestation. Plant–insect interactions in such complex stress situations are poorly understood. We evaluated the performance of the grain aphid (Sitobion avenae) in wheat (Triticum aestivum L.) exposed to a combination of heat and drought stresses. We also performed assays of the relative water content, nutritional quality, and responses of phytohormone signaling pathways. Lower relative water content and accumulation of soluble sugars and amino acids were observed in plants exposed to combined heat and drought stress. These conditions increased abscisic acid levels in the absence of aphids, as well as leading to higher levels of jasmonate-dependent transcripts. The grain aphid infestation further increased abscisic acid levels and the abundance of jasmonic acid- and salicylic acid-dependent defenses under the combined stress conditions. Aphids reared on plants grown under drought stress alone showed lower net reproductive rates, intrinsic rates of increase, and finite rates of increase compared with aphids reared on plants in the absence of stress. The heat-treated plants also showed a decreased aphid net reproductive rate. These findings demonstrate that exposure to a combination of stresses enhances plant defense responses against aphids as well as altering nutritional quality.
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spelling pubmed-72107782020-05-14 Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress Xie, Haicui Shi, Jianqin Shi, Fengyu Xu, Haiyun He, Kanglai Wang, Zhenying J Exp Bot Research Papers Plants are routinely subjected simultaneously to different abiotic and biotic stresses, such as heat, drought, and insect infestation. Plant–insect interactions in such complex stress situations are poorly understood. We evaluated the performance of the grain aphid (Sitobion avenae) in wheat (Triticum aestivum L.) exposed to a combination of heat and drought stresses. We also performed assays of the relative water content, nutritional quality, and responses of phytohormone signaling pathways. Lower relative water content and accumulation of soluble sugars and amino acids were observed in plants exposed to combined heat and drought stress. These conditions increased abscisic acid levels in the absence of aphids, as well as leading to higher levels of jasmonate-dependent transcripts. The grain aphid infestation further increased abscisic acid levels and the abundance of jasmonic acid- and salicylic acid-dependent defenses under the combined stress conditions. Aphids reared on plants grown under drought stress alone showed lower net reproductive rates, intrinsic rates of increase, and finite rates of increase compared with aphids reared on plants in the absence of stress. The heat-treated plants also showed a decreased aphid net reproductive rate. These findings demonstrate that exposure to a combination of stresses enhances plant defense responses against aphids as well as altering nutritional quality. Oxford University Press 2020-05-09 2020-01-14 /pmc/articles/PMC7210778/ /pubmed/31943041 http://dx.doi.org/10.1093/jxb/eraa017 Text en © The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Papers
Xie, Haicui
Shi, Jianqin
Shi, Fengyu
Xu, Haiyun
He, Kanglai
Wang, Zhenying
Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress
title Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress
title_full Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress
title_fullStr Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress
title_full_unstemmed Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress
title_short Aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress
title_sort aphid fecundity and defenses in wheat exposed to a combination of heat and drought stress
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7210778/
https://www.ncbi.nlm.nih.gov/pubmed/31943041
http://dx.doi.org/10.1093/jxb/eraa017
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