Effect of post-harvest temperatures on the development of internal darkening and quality in mango (Mangifera indica L.) cv. Haden
1999
Nieto, A.R. | Vaquera, H.H. | Teliz, O.D. | Mena, N.G. | Nieto, A.D. | Acosta, R.M.(Instituto de Fitosanidad, Montecillo (Mexico))
Objective of this work is to identify the effect of post-harvest storage temperatures on the development of Black Flesh (BF) in mango fruits. Mango fruits cv. Haden were stored during 20 days under 8, 13 and 18 deg C, 1 deg C. After the storage period, fruit was evaluated at 22, 24, 26 and 28 days after harvest (DAH). During this period, the fruit was kept under a temperature of 22 deg C+-3 deg C with an average relative humidity of 60 percent. The experimental unit consisted of a fruit piece with 18 replications. The variables under evaluation were: incidence and severity of BF, turgor losses (TL), Total soluble solids (TSS) and the malic acid percentage (MAP). The incidence and severity of BF increased as the post-harvest life of fruits stored under 13 and 18 deg C was extended. The black flesh symptoms were not developed under a temperature of 8 deg C, even when the damages due to cold effects were present with a 28 percent incidence. These damages were expressed in terms of an abnormal maturing. PFP's and TSS's also increased, while TL's and MAP's reduced. The highest concentration of malic acid was observed under storage at 18 deg C. TSS concentration was higher under a temperature of 13 deg C, even when significant differences (alpha=0.05) were observed on the 22nd day after harvest. Turgor loss was significantly (alpha=0.05) lower in fruits stored at 8 deg C. Minor MAP losses were observed at 8 deg C and they were significantiy (alpha=0.05) lower under temperatures of 13 and 18 deg C.
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