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Authors: Darade, Bhimraj Ramrao
Advisor: Karale, Prof.A.R
Desai, Dr.U.T
Kaulgud, Prof S.N
Deore, Prof. B.P
Language: en
Type: Thesis
Agrotags: null
Abstract: A study was undertaken on physico-chemical changes during growth and development of pomegranate fruit at the Department of Horticulture, Mahatma Phule Krishi Vidyapeeth, Rahuri, during Mricr bahar of 1994. The physico-chemical changes in the fruits of six promising F2 genotypes of pomegranate viz., No. 5, No. 31, No. 61, No, 429, No. 469 and No. 508 along with cv. Ganesh were studied at certain intervals from anthesis till 165th day. The physical parameters such as weight, volume, length, diameter and biochemical parameters such as TSS, acidity, sugars, ascorbic acid, tannins and anthocyanins were studied. The fruit growth in respect of weight, volume, length and diameter showed a single sigmoid growth curve almost approaching a linear relationship. The growth period of fruit could be broadly divided into three phases based on the rate of growth. The growth rate of fruit in respect of weight was found maximum during phase TT. The fruit length to diameter ratio was more than one in early period hut towards fruit maturity, the ratio approached, almost unit giving a round shaped fruit. The specific gravity of fruit, showed a declining trend with the advancement in the age of fruit. The shape of fruit changed from elongated oval to round with suppressions on sides at 135 days stage. The fruit colour changed from deep green, pink to deep pink and deep red during growth and development. The colour of the arils changed from creamy white/pearl white to pink to red and blood red during subsequent stages of development. The fresh weight of arils and rind, percentage of arils, aril : rind ratio, size of arils, percentage of juice increased while the percentage of rind, rind thickness, percentage of seed decreased with the advancement in the age of fruit in cv. Ganesh and all the genotypes of pomegranate under study. The growth rate of arils was maximum during 1.05-1 20 days period while maximum percentage of increase in juice was found between 60-90 days period. The dry matter content of arils incresaed at a fast, rate upto 60 days stage and after that it decreased while the dry matter content of rind increased continuously during fruit growth and development. The seed hardness increased upto .120 days and afterwards declined slightly upto 165 days stage. The intensity of internal breakdown (browning of arils) increased as the age of fruit advanced. The total soluble solids and TSS : acid ratio showed an increasing trend whereas titratable acidity recorded a negative trend with fruit growth and development. The total and reducing sugars increased throughout the fruit development, while the non-reducing sugars content increased upto .135 days stage and thereafter decreased. The ascorbic acid content, of juice showed an increasing trend with fruit development. The tannin content of juice and rind decreased and rind contained more tannins than juice throughout the development of fruits. The total anthocyanin content in arils showed an increasing trend with advancement in the age of fruit. After considering the physico-chemical parameters, it could be suggested that pomegranate fruits mature within a period of 142 days after anthesis and can be harvested any time after 135 and before 142 days of fruit growth to obtain eating ripe quality.
Subject: Horticulture
Theme: Horticulture
These Type: M.Sc
Issue Date: 1995-07-17
Appears in Collections:Thesis

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