INQUISAL   20936
INSTITUTO DE QUIMICA DE SAN LUIS "DR. ROBERTO ANTONIO OLSINA"
Unidad Ejecutora - UE
artículos
Título:
Melatonin in Arabidopsis thaliana acts as plant growth regulator at low concentrations and preserves seed viability at high concentrations
Autor/es:
ISMAEL GATICA HERNÁNDEZ; FEDERICO JOSÉ VICENTE GOMEZ; SOLEDAD CERUTTI; MARÍA VERÓNICA ARANA; MARÍA FERNANDA SILVA
Revista:
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Editorial:
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Referencias:
Lugar: Paris; Año: 2015 vol. 94 p. 191 - 196
ISSN:
0981-9428
Resumen:
Since the discovery of melatonin in plants, several roles have been described for different species, organs,and developmental stages. Arabidopsis thaliana, being a model plant species, is adequate to contribute tothe elucidation of the role of melatonin in plants. In this work, melatonin was monitored daily by UHPLCMS/MS in leaves, in order to study its diurnal accumulation as well as the effects of natural and artificiallight treatments on its concentration. Furthermore, the effects of exogenous application of melatonin toassess its role in seed viability after heat stress and as a regulator of growth and development ofvegetative tissues were evaluated. Our results indicate that melatonin contents in Arabidopsis werehigher in plants growing under natural radiation when compared to those growing under artificialconditions, and its levels were not diurnally-regulated. Exogenous melatonin applications prolongedseed viability after heat stress conditions. In addition, melatonin applications retarded leaf senescence.Its effects as growth promoter were dose and tissueedependent; stimulating root growth at low concentrationsand decreasing leaf area at high doses.