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dc.contributor.authorPastor, Victoria
dc.contributor.authorGamir, J.
dc.contributor.authorCamañes Querol, Gemma
dc.contributor.authorCerezo García, Miguel
dc.contributor.authorSanchez-Bel, Paloma
dc.description.abstractDisruption of the high-affinity nitrate transporter NRT2.1 activates the priming defense against Pseudomonas syringae, resulting in enhanced resistance. In this study, it is demonstrated that the high-affinity ammonium transporter AMT1.1 is a negative regulator of Arabidopsis defense responses. The T-DNA knockout mutant amt1.1 displays enhanced resistance against Plectosphaerella cucumerina and reduced susceptibility to P. syringae. The impairment of AMT1.1 induces significant metabolic changes in the absence of challenge, suggesting that amt1.1 retains constitutive defense responses. Interestingly, amt1.1 combats pathogens differently depending on the lifestyle of the pathogen. In addition, N starvation enhances the susceptibility of wild type plants and the mutant amt1.1 to P. syringae whereas it has no effect on P. cucumerina resistance. The metabolic changes of amt1.1 against P. syringae are subtler and are restricted to the phenylpropanoid pathway, which correlates with its reduced susceptibility. By contrast, the amt1.1 mutant responds by activating higher levels of camalexin and callose against P. cucumerina. In addition, amt1.1 shows altered levels of aliphatic and indolic glucosinolates and other Trp-related compounds following infection by the necrotroph. These observations indicate that AMT1.1 may play additional roles that affect N uptake and plant immune responses.ca_CA
dc.relation.isPartOfFrontiers in plant science, 2014, vol. 5ca_CA
dc.rightsAttribution 3.0 Spain*
dc.rightsThis Document is Protected by copyright and was first published by Frontiers. All rights reserved. it is reproduced with permission. Copyright © 2014 Pastor, Gamir, Camañes, Cerezo, Sánchez-Bel and Flors. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.subjectbasal resistanceca_CA
dc.titleDisruption of the ammonium transporter AMT1.1 alters basal defenses generating resistance against Pseudomonas syringae and Plectosphaerella cucumerinaca_CA

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Attribution 3.0 Spain
Excepto si se señala otra cosa, la licencia del ítem se describe como: Attribution 3.0 Spain