Response of Gamma Irradiation and Storage Temperature on Postharvest Physiology, Quality and Shelf Life of Indian Jujube (Ziziphus mauritiana Lamk.) Fruit
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Date
2020
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MPUT, UDAIPUR
Abstract
Present experiment entitled “Response of gamma irradiation and storage
temperature on postharvest physiology, quality and shelf life of Indian jujube (Ziziphus
mauritiana Lamk.) fruit” was carried out in the Department of Horticulture, Rajasthan
College of Agriculture, Udaipur. Experiment was conducted from January 2018 to April
2019. Indian jujube (cv. Gola and Umran) fruits were obtained from an experimental
farm, Central Institute of Arid Horticulture, Bikaner, Rajasthan, India. Physiological
mature fruit at colour turning stage were hand-picked and brought to the Nuclear
Research Laboratory, Indian Agriculture Research Institute, New Delhi for irradiation
within 12 h of harvest. Ber fruits were packed into LDPE bags and subjected to gamma
irradiation (0, 0.2, 0.4, 0.6, 0.8 and 1.0 kGy) using radiation source of 60Co (13000 Ci)
with a dose rate of 01.016 kGy/h. After irradiation, fruit were stored at ambient, 15ºC,
and 10ºC temperatures for 35 days. These 18 treatment combinations were evaluated
under factorial completely randomized design with three replications.
The fruit were examined for various physiological, biochemical, color, chilling
injury and sensory traits at 7 days interval. The present study showed that irradiation was
the major factor affecting the physiology, quality and shelf life of ber fruits after harvest.
Fruit stored as control (untreated) at ambient temperature lost their quality attributes very
rapidly, manifested by accelerated color changes (L*, a*, b*, C* and hº), high rate of
respiration, ethylene production, quick degradation in quality parameters and speedy
ripening. The irradiation retarded these changes; the efficacy is being higher in fruit
treated with higher dose and stored at low temperature (10ºC) as a result of the delay in
fruit ripening. The both varieties were showed same trend in response to irradiation and
storage temperature but some quality parameters were show slightly positive direction in
cv. Umran due to its thickened skin. The result of the study showed that better retention
of colour and sensory traits was observed at higher dose (1.0 kGy).
Finally, this research indicated that gamma irradiation up to 1.0 kGy could be
effective major for preservation of ber fruit quality, bioactive compound and alleviated
chilling injury at minimum level. As far as relative economics of treatments is concerned
G6 (1.0 kGy) with T3 (10ºC) storage temperature gave the highest returns (1.19) as
compared to other treatments
Description
Response of Gamma Irradiation and Storage Temperature on Postharvest Physiology, Quality and Shelf Life of Indian Jujube Fruit
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Citation
Jat L. And Lakhawat S.S.