Your browser doesn't support javascript.
loading
Jasmonate Signalling Contributes to Primary Root Inhibition Upon Oxygen Deficiency in Arabidopsis thaliana.
Shukla, Vinay; Lombardi, Lara; Pencik, Ales; Novak, Ondrej; Weits, Daan A; Loreti, Elena; Perata, Pierdomenico; Giuntoli, Beatrice; Licausi, Francesco.
Afiliação
  • Shukla V; Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, 56127 Pisa, Italy.
  • Lombardi L; Department of Biology, University of Pisa, 56126 Pisa, Italy.
  • Pencik A; Laboratory of Growth Regulators, Faculty of Science, Palacký University & Institute of Experimental Botany, The Czech Academy of Sciences, CZ-783 71 Olomouc, Czech Republic.
  • Novak O; Laboratory of Growth Regulators, Faculty of Science, Palacký University & Institute of Experimental Botany, The Czech Academy of Sciences, CZ-783 71 Olomouc, Czech Republic.
  • Weits DA; Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, 56127 Pisa, Italy.
  • Loreti E; The Institute of Agricultural Biology and Biotechnology, National Research Council, 20133 Milan, Italy.
  • Perata P; Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, 56127 Pisa, Italy.
  • Giuntoli B; Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, 56127 Pisa, Italy.
  • Licausi F; Department of Biology, University of Pisa, 56126 Pisa, Italy.
Plants (Basel) ; 9(8)2020 Aug 17.
Article em En | MEDLINE | ID: mdl-32824502
ABSTRACT
Plants, including most crops, are intolerant to waterlogging, a stressful condition that limits the oxygen available for roots, thereby inhibiting their growth and functionality. Whether root growth inhibition represents a preventive measure to save energy or is rather a consequence of reduced metabolic rates has yet to be elucidated. In the present study, we gathered evidence for hypoxic repression of root meristem regulators that leads to root growth inhibition. We also explored the contribution of the hormone jasmonic acid (JA) to this process in Arabidopsis thaliana. Analysis of transcriptomic profiles, visualisation of fluorescent reporters and direct hormone quantification confirmed the activation of JA signalling under hypoxia in the roots. Further, root growth assessment in JA-related mutants in aerobic and anaerobic conditions indicated that JA signalling components contribute to active root inhibition under hypoxia. Finally, we show that the oxygen-sensing transcription factor (TF) RAP2.12 can directly induce Jasmonate Zinc-finger proteins (JAZs), repressors of JA signalling, to establish feedback inhibition. In summary, our study sheds new light on active root growth restriction under hypoxic conditions and on the involvement of the JA hormone in this process and its cross talk with the oxygen sensing machinery of higher plants.
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Plants (Basel) Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Itália

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Plants (Basel) Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Itália