Your browser doesn't support javascript.
loading
Ethylene-independent signaling by the ethylene precursor ACC in Arabidopsis ovular pollen tube attraction.
Mou, Wangshu; Kao, Yun-Ting; Michard, Erwan; Simon, Alexander A; Li, Dongdong; Wudick, Michael M; Lizzio, Michael A; Feijó, José A; Chang, Caren.
Afiliação
  • Mou W; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.
  • Kao YT; Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Leuven, Belgium.
  • Michard E; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.
  • Simon AA; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.
  • Li D; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.
  • Wudick MM; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.
  • Lizzio MA; Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Leuven, Belgium.
  • Feijó JA; Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD, USA.
  • Chang C; Institute for Molecular Physiology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany.
Nat Commun ; 11(1): 4082, 2020 08 14.
Article em En | MEDLINE | ID: mdl-32796832
The phytohormone ethylene has numerous effects on plant growth and development. Its immediate precursor, 1-aminocyclopropane-1-carboxylic acid (ACC), is a non-proteinogenic amino acid produced by ACC SYNTHASE (ACS). ACC is often used to induce ethylene responses. Here, we demonstrate that ACC exhibits ethylene-independent signaling in Arabidopsis thaliana reproduction. By analyzing an acs octuple mutant with reduced seed set, we find that ACC signaling in ovular sporophytic tissue is involved in pollen tube attraction, and promotes secretion of the pollen tube chemoattractant LURE1.2. ACC activates Ca2+-containing ion currents via GLUTAMATE RECEPTOR-LIKE (GLR) channels in root protoplasts. In COS-7 cells expressing moss PpGLR1, ACC induces the highest cytosolic Ca2+ elevation compared to all twenty proteinogenic amino acids. In ovules, ACC stimulates transient Ca2+ elevation, and Ca2+ influx in octuple mutant ovules rescues LURE1.2 secretion. These findings uncover a novel ACC function and provide insights for unraveling new physiological implications of ACC in plants.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arabidopsis / Etilenos / Tubo Polínico / Óvulo Vegetal Idioma: En Revista: Nat Commun Assunto da revista: BIOLOGIA / CIENCIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Arabidopsis / Etilenos / Tubo Polínico / Óvulo Vegetal Idioma: En Revista: Nat Commun Assunto da revista: BIOLOGIA / CIENCIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Estados Unidos