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Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides

Changes in climate due to rising atmospheric carbon dioxide concentration ([CO(2)]) are predicted to intensify episodes of drought, but our understanding of how these combined conditions will influence crop-pathogen interactions is limited. We recently demonstrated that elevated [CO(2)] alone enhanc...

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Autores principales: Vaughan, Martha M., Huffaker, Alisa, Schmelz, Eric A., Dafoe, Nicole J., Christensen, Shawn A., McAuslane, Heather J., Alborn, Hans T., Allen, Leon Hartwell, Teal, Peter E. A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4943682/
https://www.ncbi.nlm.nih.gov/pubmed/27410032
http://dx.doi.org/10.1371/journal.pone.0159270
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author Vaughan, Martha M.
Huffaker, Alisa
Schmelz, Eric A.
Dafoe, Nicole J.
Christensen, Shawn A.
McAuslane, Heather J.
Alborn, Hans T.
Allen, Leon Hartwell
Teal, Peter E. A.
author_facet Vaughan, Martha M.
Huffaker, Alisa
Schmelz, Eric A.
Dafoe, Nicole J.
Christensen, Shawn A.
McAuslane, Heather J.
Alborn, Hans T.
Allen, Leon Hartwell
Teal, Peter E. A.
author_sort Vaughan, Martha M.
collection PubMed
description Changes in climate due to rising atmospheric carbon dioxide concentration ([CO(2)]) are predicted to intensify episodes of drought, but our understanding of how these combined conditions will influence crop-pathogen interactions is limited. We recently demonstrated that elevated [CO(2)] alone enhances maize susceptibility to the mycotoxigenic pathogen, Fusarium verticillioides (Fv) but fumonisin levels remain unaffected. In this study we show that maize simultaneously exposed to elevated [CO(2)] and drought are even more susceptible to Fv proliferation and also prone to higher levels of fumonisin contamination. Despite the increase in fumonisin levels, the amount of fumonisin produced in relation to pathogen biomass remained lower than corresponding plants grown at ambient [CO(2)]. Therefore, the increase in fumonisin contamination was likely due to even greater pathogen biomass rather than an increase in host-derived stimulants. Drought did not negate the compromising effects of elevated [CO(2)] on the accumulation of maize phytohormones and metabolites. However, since elevated [CO(2)] does not influence the drought-induced accumulation of abscisic acid (ABA) or root terpenoid phytoalexins, the effects elevated [CO(2)] are negated belowground, but the stifled defense response aboveground may be a consequence of resource redirection to the roots.
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spelling pubmed-49436822016-08-01 Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides Vaughan, Martha M. Huffaker, Alisa Schmelz, Eric A. Dafoe, Nicole J. Christensen, Shawn A. McAuslane, Heather J. Alborn, Hans T. Allen, Leon Hartwell Teal, Peter E. A. PLoS One Research Article Changes in climate due to rising atmospheric carbon dioxide concentration ([CO(2)]) are predicted to intensify episodes of drought, but our understanding of how these combined conditions will influence crop-pathogen interactions is limited. We recently demonstrated that elevated [CO(2)] alone enhances maize susceptibility to the mycotoxigenic pathogen, Fusarium verticillioides (Fv) but fumonisin levels remain unaffected. In this study we show that maize simultaneously exposed to elevated [CO(2)] and drought are even more susceptible to Fv proliferation and also prone to higher levels of fumonisin contamination. Despite the increase in fumonisin levels, the amount of fumonisin produced in relation to pathogen biomass remained lower than corresponding plants grown at ambient [CO(2)]. Therefore, the increase in fumonisin contamination was likely due to even greater pathogen biomass rather than an increase in host-derived stimulants. Drought did not negate the compromising effects of elevated [CO(2)] on the accumulation of maize phytohormones and metabolites. However, since elevated [CO(2)] does not influence the drought-induced accumulation of abscisic acid (ABA) or root terpenoid phytoalexins, the effects elevated [CO(2)] are negated belowground, but the stifled defense response aboveground may be a consequence of resource redirection to the roots. Public Library of Science 2016-07-13 /pmc/articles/PMC4943682/ /pubmed/27410032 http://dx.doi.org/10.1371/journal.pone.0159270 Text en https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication.
spellingShingle Research Article
Vaughan, Martha M.
Huffaker, Alisa
Schmelz, Eric A.
Dafoe, Nicole J.
Christensen, Shawn A.
McAuslane, Heather J.
Alborn, Hans T.
Allen, Leon Hartwell
Teal, Peter E. A.
Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides
title Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides
title_full Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides
title_fullStr Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides
title_full_unstemmed Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides
title_short Interactive Effects of Elevated [CO(2)] and Drought on the Maize Phytochemical Defense Response against Mycotoxigenic Fusarium verticillioides
title_sort interactive effects of elevated [co(2)] and drought on the maize phytochemical defense response against mycotoxigenic fusarium verticillioides
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4943682/
https://www.ncbi.nlm.nih.gov/pubmed/27410032
http://dx.doi.org/10.1371/journal.pone.0159270
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