Methyl jasmonate effects on pomegranate fruit yield and quality at harvest and during storage depend on the applied concentration
Methyl jasmonate (MeJA) is considered as hormone acting in the regulation of a wide range of physiological processes in plants, including responses to abiotic and biotic stresses. In the present research, the effect of preharvest MeJA treatment on the ripening process and fruit quality parameters at harvest and during postharvest storage at 10°C was evaluated, for the first time, in 'Mollar de Elche' during 2016. MeJA treatments were applied at 1, 5 and 10 mM along the developmental growth cycle and quality, affecting pomegranate fruit ripening process and tree yield differently depending on applied concentration. Treatments with MeJA led to tree productivity with higher yield, number of fruit and fruit weight, while those treated with 10 mM were harvesting later than control. Fruit was harvested with commercial criteria of skin color and total soluble solids content. However, the arils hue angle was lower at harvest for treated fruit. During storage, the weight loss and respiration rate were lower for MeJA treated pomegranate fruit. In addition, firmness levels were increased by these MeJA treatments.
García-Pastor, M.E., Martínez-Esplá, A., Medina-Santamarina, J., Guillén, F., Castillo, S. and Zapata, P.J. (2021). Methyl jasmonate effects on pomegranate fruit yield and quality at harvest and during storage depend on the applied concentration. Acta Hortic. 1311, 527-532
preharvest treatment, ripening, weight loss, firmness, total phenols