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Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata

Herbivory initiates a shift in plant metabolism from growth to defence that may reduce fitness in the absence of further herbivory. However, the defence-induced changes in carbon assimilation that precede this reallocation in resources remain largely undetermined. This study characterized the respon...

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Autores principales: Nabity, Paul D., Zavala, Jorge A., DeLucia, Evan H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3542056/
https://www.ncbi.nlm.nih.gov/pubmed/23264519
http://dx.doi.org/10.1093/jxb/ers364
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author Nabity, Paul D.
Zavala, Jorge A.
DeLucia, Evan H.
author_facet Nabity, Paul D.
Zavala, Jorge A.
DeLucia, Evan H.
author_sort Nabity, Paul D.
collection PubMed
description Herbivory initiates a shift in plant metabolism from growth to defence that may reduce fitness in the absence of further herbivory. However, the defence-induced changes in carbon assimilation that precede this reallocation in resources remain largely undetermined. This study characterized the response of photosynthesis to herbivore induction of jasmonic acid (JA)-related defences in Nicotiana attenuata to increase understanding of these mechanisms. It was hypothesized that JA-induced defences would immediately reduce the component processes of photosynthesis upon attack and was predicted that wild-type plants would suffer greater reductions in photosynthesis than plants lacking JA-induced defences. Gas exchange, chlorophyll fluorescence, and thermal spatial patterns were measured together with the production of defence-related metabolites after attack and through recovery. Herbivore damage immediately reduced electron transport and gas exchange in wild-type plants, and gas exchange remained suppressed for several days after attack. The sustained reductions in gas exchange occurred concurrently with increased defence metabolites in wild-type plants, whereas plants lacking JA-induced defences suffered minimal suppression in photosynthesis and no increase in defence metabolite production. This suppression in photosynthesis occurred only after sustained defence signalling and defence chemical mobilization, whereas a short bout of feeding damage only transiently altered components of photosynthesis. It was identified that lipoxygenase signalling interacted with photosynthetic electron transport and that the resulting JA-related metabolites reduced photosynthesis. These data represent a metabolic cost to mounting a chemical defence against herbivory and link defence-signalling networks to the differential effects of herbivory on photosynthesis in remaining leaf tissues in a time-dependent manner.
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spelling pubmed-35420562013-01-31 Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata Nabity, Paul D. Zavala, Jorge A. DeLucia, Evan H. J Exp Bot Research Paper Herbivory initiates a shift in plant metabolism from growth to defence that may reduce fitness in the absence of further herbivory. However, the defence-induced changes in carbon assimilation that precede this reallocation in resources remain largely undetermined. This study characterized the response of photosynthesis to herbivore induction of jasmonic acid (JA)-related defences in Nicotiana attenuata to increase understanding of these mechanisms. It was hypothesized that JA-induced defences would immediately reduce the component processes of photosynthesis upon attack and was predicted that wild-type plants would suffer greater reductions in photosynthesis than plants lacking JA-induced defences. Gas exchange, chlorophyll fluorescence, and thermal spatial patterns were measured together with the production of defence-related metabolites after attack and through recovery. Herbivore damage immediately reduced electron transport and gas exchange in wild-type plants, and gas exchange remained suppressed for several days after attack. The sustained reductions in gas exchange occurred concurrently with increased defence metabolites in wild-type plants, whereas plants lacking JA-induced defences suffered minimal suppression in photosynthesis and no increase in defence metabolite production. This suppression in photosynthesis occurred only after sustained defence signalling and defence chemical mobilization, whereas a short bout of feeding damage only transiently altered components of photosynthesis. It was identified that lipoxygenase signalling interacted with photosynthetic electron transport and that the resulting JA-related metabolites reduced photosynthesis. These data represent a metabolic cost to mounting a chemical defence against herbivory and link defence-signalling networks to the differential effects of herbivory on photosynthesis in remaining leaf tissues in a time-dependent manner. Oxford University Press 2013-01 2013-01-31 /pmc/articles/PMC3542056/ /pubmed/23264519 http://dx.doi.org/10.1093/jxb/ers364 Text en © 2012 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Paper
Nabity, Paul D.
Zavala, Jorge A.
DeLucia, Evan H.
Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata
title Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata
title_full Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata
title_fullStr Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata
title_full_unstemmed Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata
title_short Herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in Nicotiana attenuata
title_sort herbivore induction of jasmonic acid and chemical defences reduce photosynthesis in nicotiana attenuata
topic Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3542056/
https://www.ncbi.nlm.nih.gov/pubmed/23264519
http://dx.doi.org/10.1093/jxb/ers364
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