INFLUENCE OF HARVESTING STAGES AND POST HARVEST TREATMENTS ON FRUIT QUALITY OF BITTERGOURD GROWN UNDER PROTECTED STRUCTURE
Loading...
Date
2019
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DIVISION OF VEGETABLE SCIENCE ICAR-INDIAN AGRICULTURAL RESEARCH INSTITUTE NEW DELHI
Abstract
The present investigation was undertaken during 2018-2019 at the experimental farm of
Centre for Protected Cultivation Technology and at Division of vegetable science ICARIARI, New Delhi. Two bitter gourd varieties (Pusa Rasdar and S-32) were grown under
polyhouse condition using Randomised Complete Block Design (RCBD) to study physicchemical changes in bitter gourd fruits grown under protected structures at different
harvesting stages and to find out effect of edible coating and shrink wrapping on storage life
and quality of bitter gourd fruit. The results revealed that the maximum fruit length
(19.87cm) was recorded in S-32 compared to Pusa Rasdar on 24 days after pollination
whereas maximum fruit diameter (6.23cm) and fruit weight (153.22g) was recorded in Pusa
Rasdar. The maximum fruit juice content was recorded in Pusa Rasdar (61.65%) at 24 days
after pollination whereas maximum chlorophyll-a (7.86 µg/g), chlorophyll-b (3.46µg/g) and
total chlorophyll content (9.48µg/g) was recorded in S-32 compared to Pusa Rasdar. The
maximum β-carotene content was recorded in S-32 (3.62µg/ml) at 24 days after pollination.
The saponin content of fruits was recorded maximum at 16 DAP in S-32 (0.95mg/g) and
charantin content was found to be maximum at16 DAP in S-32 (0.39mg/g).
The edible wax coatings (guar gum (GG), sodium alginate (SA) and vegetable wax
(VW) were applied before storage. Pusa Rasdar remained marketable up to 6 days during
winter and 3 days during summers at room temperature. The PLW for control fruits was
observed to be 25.11% until 9 days of storage whereas PLW for coated fruits ranged from
11.67 % to 15.45%. PLW was much lesser in cold stored fruits. Amongst the coatings, GG
and SA gave remarkably better results over VW. In control fruits, the cutting force was found
to decrease from 126.5 N to 61.14 N (51.67%) until 9th day of storage whereas, coated fruits
required higher force to cut over control fruits.
The juice of control fruits decreased to 22.11% at room temperature whereas fruits
coated with GG, SA and VW the juice content decreased to 36.46%, 39.60 % and 31.95 %
respectively after 9 days of storage. When fruits were stored at cold storage, chlorophyll
content in control decreased up to 0.92g/g during 15 days of storage. While in case of GG
and SA coated fruits chlorophyll content decreases up to 1.12 and 1.08µg/g during 15 days
period of storage. Highest chlorophyll retention was observed for GG coated fruits in both
room temperature and cold storage. Hence, the edible coatings with guar gum and sodium
alginate were found most effective for enhancing of shelf life of bitter gourd cv. Pusa Rasdar
during room temperature for 2 to 3 days and 5 to 6days in cold storage.
सार
Description
T-10212
Keywords
null