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Ethylene signaling triggered by low concentrations of ascorbic acid regulates biomass accumulation in Arabidopsis thaliana.
Caviglia, M; Mazorra Morales, L M; Concellón, A; Gergoff Grozeff, G E; Wilson, M; Foyer, C H; Bartoli, C G.
Afiliação
  • Caviglia M; Instituto de Fisiología Vegetal, Facultad Ciencias Agrarias y Forestales, Universidad Nacional de La Plata-CCT CONICET La Plata, cc327 (1900), La Plata, Argentina.
  • Mazorra Morales LM; Instituto de Fisiología Vegetal, Facultad Ciencias Agrarias y Forestales, Universidad Nacional de La Plata-CCT CONICET La Plata, cc327 (1900), La Plata, Argentina; Setor de Fisiologia Vegetal, LMGV, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, RJ, Brazil.
  • Concellón A; Centro de Investigación y Desarrollo en Criotecnología de Alimentos CCT CONICET La Plata. Facultad de Ciencias Exactas, Universidad Nacional de La Plata, calle 47 y 116 (1900), La Plata, Argentina.
  • Gergoff Grozeff GE; Instituto de Fisiología Vegetal, Facultad Ciencias Agrarias y Forestales, Universidad Nacional de La Plata-CCT CONICET La Plata, cc327 (1900), La Plata, Argentina.
  • Wilson M; Centre of Plant Sciences, School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK.
  • Foyer CH; Centre of Plant Sciences, School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds LS2 9JT, UK.
  • Bartoli CG; Instituto de Fisiología Vegetal, Facultad Ciencias Agrarias y Forestales, Universidad Nacional de La Plata-CCT CONICET La Plata, cc327 (1900), La Plata, Argentina. Electronic address: carlos.bartoli@agro.unlp.edu.ar.
Free Radic Biol Med ; 122: 130-136, 2018 07.
Article em En | MEDLINE | ID: mdl-29410312
Ascorbic acid (AA) is a major redox buffer in plant cells. The role of ethylene in the redox signaling pathways that influence photosynthesis and growth was explored in two independent AA deficient Arabidopsis thaliana mutants (vtc2-1 and vtc2-4). Both mutants, which are defective in the AA biosynthesis gene GDP-L-galactose phosphorylase, produce higher amounts of ethylene than wt plants. In contrast to the wt, the inhibition of ethylene signaling increased leaf conductance, photosynthesis and dry weight in both vtc2 mutant lines. The AA-deficient mutants showed altered expression of genes encoding proteins involved in the synthesis/responses to phytohormones that control growth, particularly auxin, cytokinins, abscisic acid, brassinosterioids, ethylene and salicylic acid. These results demonstrate that AA deficiency modifies hormone signaling in plants, redox-ethylene interactions providing a regulatory node controlling shoot biomass accumulation.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reguladores de Crescimento de Plantas / Ácido Ascórbico / Monoéster Fosfórico Hidrolases / Proteínas de Arabidopsis / Etilenos Idioma: En Revista: Free Radic Biol Med Assunto da revista: BIOQUIMICA / MEDICINA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Argentina País de publicação: Estados Unidos
Texto completo
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XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reguladores de Crescimento de Plantas / Ácido Ascórbico / Monoéster Fosfórico Hidrolases / Proteínas de Arabidopsis / Etilenos Idioma: En Revista: Free Radic Biol Med Assunto da revista: BIOQUIMICA / MEDICINA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Argentina País de publicação: Estados Unidos