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Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae

BACKGROUND: Drought may become one of the greatest challenges for cereal production under future warming scenarios, and its impact on insect pest outbreaks is still controversial. To address this issue, life-history responses of the English grain aphid, Sitobion avenae (Fabricius), from three areas...

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Autores principales: Liu, Deguang, Dai, Peng, Li, Shirong, Ahmed, Syed Suhail, Shang, Zheming, Shi, Xiaoqin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975275/
https://www.ncbi.nlm.nih.gov/pubmed/29843697
http://dx.doi.org/10.1186/s12898-018-0173-0
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author Liu, Deguang
Dai, Peng
Li, Shirong
Ahmed, Syed Suhail
Shang, Zheming
Shi, Xiaoqin
author_facet Liu, Deguang
Dai, Peng
Li, Shirong
Ahmed, Syed Suhail
Shang, Zheming
Shi, Xiaoqin
author_sort Liu, Deguang
collection PubMed
description BACKGROUND: Drought may become one of the greatest challenges for cereal production under future warming scenarios, and its impact on insect pest outbreaks is still controversial. To address this issue, life-history responses of the English grain aphid, Sitobion avenae (Fabricius), from three areas of different drought levels were compared under three water treatments. RESULTS: Significant differences were identified in developmental time, fecundity and adult weight among S. avenae clones from moist, semiarid and arid areas under all the three water treatments. Semiarid and arid area clones tended to have higher heritability for test life-history traits than moist area clones. We identified significant selection of water-deficit on the developmental time of 1st instar nymphs and adult weight for both semiarid and arid area clones. The impact of intermediate and severe water-stress on S. avenae’s fitness was neutral and negative (e.g., decreased fecundity and weight), respectively. Compared with arid-area clones, moist- and semiarid-area clones showed higher extents of adaptation to the water-deficit level of their respective source environment. Adult weight was identified as a good indicator for S. avenae’s adaptation potential under different water-stress conditions. After their exposure to intermediate water-deficit stress for only five generations, adult weight and fecundity tended to decrease for moist- and semiarid-area clones, but increase for arid-area clones. CONCLUSIONS: It is evident from our study that S. avenae clones from moist, semiarid and arid areas have diverged under different water-deficit stress, and such divergence could have a genetic basis. The impact of drought on S. avenae’s fitness showed a water-level dependent pattern. Clones of S. avenae were more likely to become adapted to intermediate water-deficit stress than severe water-deficit stress. After continuous water-deficit stress of only five generations, the adaptation potential of S. avenae tended to decrease for moist and semiarid area clones, but increase for arid area clones. The rapid shift of aphids’ life-history traits and adaptation potential under drought could have significant implications for their evolutionary dynamics and outbreak risks in future climate change scenarios. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12898-018-0173-0) contains supplementary material, which is available to authorized users.
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spelling pubmed-59752752018-05-31 Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae Liu, Deguang Dai, Peng Li, Shirong Ahmed, Syed Suhail Shang, Zheming Shi, Xiaoqin BMC Ecol Research Article BACKGROUND: Drought may become one of the greatest challenges for cereal production under future warming scenarios, and its impact on insect pest outbreaks is still controversial. To address this issue, life-history responses of the English grain aphid, Sitobion avenae (Fabricius), from three areas of different drought levels were compared under three water treatments. RESULTS: Significant differences were identified in developmental time, fecundity and adult weight among S. avenae clones from moist, semiarid and arid areas under all the three water treatments. Semiarid and arid area clones tended to have higher heritability for test life-history traits than moist area clones. We identified significant selection of water-deficit on the developmental time of 1st instar nymphs and adult weight for both semiarid and arid area clones. The impact of intermediate and severe water-stress on S. avenae’s fitness was neutral and negative (e.g., decreased fecundity and weight), respectively. Compared with arid-area clones, moist- and semiarid-area clones showed higher extents of adaptation to the water-deficit level of their respective source environment. Adult weight was identified as a good indicator for S. avenae’s adaptation potential under different water-stress conditions. After their exposure to intermediate water-deficit stress for only five generations, adult weight and fecundity tended to decrease for moist- and semiarid-area clones, but increase for arid-area clones. CONCLUSIONS: It is evident from our study that S. avenae clones from moist, semiarid and arid areas have diverged under different water-deficit stress, and such divergence could have a genetic basis. The impact of drought on S. avenae’s fitness showed a water-level dependent pattern. Clones of S. avenae were more likely to become adapted to intermediate water-deficit stress than severe water-deficit stress. After continuous water-deficit stress of only five generations, the adaptation potential of S. avenae tended to decrease for moist and semiarid area clones, but increase for arid area clones. The rapid shift of aphids’ life-history traits and adaptation potential under drought could have significant implications for their evolutionary dynamics and outbreak risks in future climate change scenarios. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12898-018-0173-0) contains supplementary material, which is available to authorized users. BioMed Central 2018-05-29 /pmc/articles/PMC5975275/ /pubmed/29843697 http://dx.doi.org/10.1186/s12898-018-0173-0 Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Liu, Deguang
Dai, Peng
Li, Shirong
Ahmed, Syed Suhail
Shang, Zheming
Shi, Xiaoqin
Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae
title Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae
title_full Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae
title_fullStr Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae
title_full_unstemmed Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae
title_short Life-history responses of insects to water-deficit stress: a case study with the aphid Sitobion avenae
title_sort life-history responses of insects to water-deficit stress: a case study with the aphid sitobion avenae
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5975275/
https://www.ncbi.nlm.nih.gov/pubmed/29843697
http://dx.doi.org/10.1186/s12898-018-0173-0
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