Effect of post harvest vacuum infiltration of calcium chloride on changes in mineral composition of alphonso mango fruit during storage with reference to spongy tissue a post harvest disorder
1999
Hari Babu, K.(S.V. Agricultural College, Tirupathi (India). Department of Horticulture)
Mature, unripe Alphonso mango fruits were infiltrated under vacuum at 250 mg Hg for 5 minutes with 0.0, 1.0, 2.0 or 3.0 percent Calcium Chloride (CaCl2) and stored at room temperature. Minerals like Calcium (Ca), Potassium (K) and Phosphorus (P) were estimated in peel and six different pulp tissues of the fruit at 0, 5, 9 or 12 days after harvest (DAH). During storage Ca content of the peel showed a decreasing trend upto 9 DAH and it remained at a constant level from 9 to 12 DAH in CaCl2 treated fruits. Whereas Ca content in the peel of the untreated fruits showed only a slight change during storage upto 12 DAH. The pulp at the basal part of the fruit had more Ca content followed by the pulp at the middle and apical part of the fruit. The pulp close to the peel recorded more Ca content than that near the endocarp in all the treatments throughout the storage period. Maximum spongy tissue occured in the apical part of the pulp nearer to the endocarp, where Ca content was the lowest. More K and P contents were recorded in the pulp at middle part of the fruit than at the basal and apical part of pulp and pulp nearer to the endocarp showed more K and P contents than those near the peel. It was observed that initial K content in all the six different pulp tissues at 5 DAH followed by an increase upto 12 DAH. Whereas P content in pulp increased gradually upto 5 DAH followed by a sudden increase at 9 DAH and thereafter it declined. The spongy tissue in the pulp recorded very low Ca and higher K and P contents.
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