Abstract

ALVAREZ-VARGAS, Juan Emilio et al. Effect of 2-chloroethyl phosphonic acid on mamey sapote fruit ripening. Rev. Chapingo Ser.Hortic [online]. 2012, vol.18, n.3, pp.357-370. ISSN 2007-4034.  https://doi.org/10.5154/r.rchsh.2011.03.015.

Mamey sapote fruits harvested at physiological maturity were stored in 35 L containers and ethephon (2-chloroethyl phosphonic acid) was applied at 0, 100 and 500 mg·L^-1 doses during 24 h. After this treatment, the fruits were stored during 0, 7, 14, 21 and 28 days at 10°C and then they were transferred at room temperature (24 ± 1°C, 50-60 % RH) during another eight days. The fruit ripening treated with or without ethephon was homogeneous. The quality characteristics were not adversely affected by ethephon use. After 14 storage days at 10°C ± 1 and eight days at room temperature the chilling injury symptoms started to show, and they were mild to severe after 21 and 28 storage days at the same temperature. The fruits stored during 21 and 28 days at 10± 1°C and ripened at room temperature, 24 ±1°C, showed chilling injury symptoms and increased presence of pathogens in the pulp, and lower total soluble solids content. Luminosity decreased significantly while the hue and chromaticity increased, the latter associated to chilling injury symptoms in the pulp (lignification and flesh browning). Respiration and ethylene production increased significantly after storage, even in the fruits where no ethephon was applied, suggesting that there was no significant response to exogenous ethylene on these parameters.

Keywords : Ethepon; Pouteria sapota; ethylene; respiration; total soluble solids; chilling injury; quality.

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