Ammonium enhances resistance to salinity stress in citrus plants
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
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comunitat-uji-handle3:10234/6999
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Títol
Ammonium enhances resistance to salinity stress in citrus plantsData de publicació
2012Editor
ElsevierISSN
0176-1617; 1618-1328Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://www.sciencedirect.com/science/article/pii/S0176161712002192Paraules clau / Matèries
Resum
In this work, we demonstrate that NH4+ nutrition in citrange Carrizo plants acts as an inducer of resistance against salinity conditions. We investigated its mode of action and provide evidence that NH4+ confers ... [+]
In this work, we demonstrate that NH4+ nutrition in citrange Carrizo plants acts as an inducer of resistance against salinity conditions. We investigated its mode of action and provide evidence that NH4+ confers resistance by priming abscisic acid and polyamines, and enhances H2O2 and proline basal content. Moreover, we observed reduced Cl− uptake as well as enhanced PHGPx expression after salt stress. Control and N-NH4+ plants showed optimal growth. However, N-NH4+ plants displayed greater dry weight and total lateral roots than control plants, but these differences were not observed for primary root length. Our results revealed that N-NH4+ treatment induces a similar phenotypical response to the recent stress-induced morphogenetic response (SIMRs). The hypothesis is that N-NH4+ treatment triggers mild chronic stress in citrange Carrizo plants, which might explain the SIMR observed. Moreover, we observed modulators of stress signaling, such as H2O2 in N-NH4+ plants, which could acts as an intermediary between stress and the development of the SIMR phenotype. This observation suggests that NH4+ treatments induce a mild stress condition that primes the citrange Carrizo defense response by stress imprinting and confers protection against subsequent salt stress. [-]
Publicat a
Journal of Plant Physiology, 169, 12Drets d'accés
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