Postharvest quality management of Papaya (Carica papaya L.)cv. Red lady (Record no. 194813)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04104nam a22001697a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 631.56 |
| Item number | MEN/PO PG |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Menaka M |
| 245 ## - TITLE STATEMENT | |
| Title | Postharvest quality management of Papaya (Carica papaya L.)cv. Red lady |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellayani |
| Name of publisher, distributor, etc | Department of post harvest technology, College of Agriculture |
| Date of publication, distribution, etc | 2020 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 95p |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | MSc |
| 520 3# - SUMMARY, ETC. | |
| Abstract | ABSTRACT The present study entitled ―Postharvest quality management of papaya (Carica papaya L.) cv. Red Lady‖ was conducted at the Department of Post Harvest Technology, College of Agriculture, Vellayani, Thiruvananthapuram during the year 2018-2020. The objective of the experiment was to standardize postharvest treatments for delayed ripening and to extend the shelf life of papaya cv. Red Lady with minimum nutritional loss through postharvest handling practices. Papaya fruits (cv. Red Lady) of uniform size, shape and maturity at colour break stage were procured from the field of progressive farmers of Farmer Producer Organisation, at Pallichal, Thiruvananthapuram. Harvested fruits were sanitized (ozonisaton 2 ppm) and subjected to hot water treatment (500C for 20 minutes) followed by postharvest dipping of fruits for 5 minutes using different treatments viz., Naphthalene Acetic Acid (NAA 250 ppm), Edible coating (Papaya Leaf Extract Aloe Gel), Gibberellic Acid (GA3 100 ppm), Calcium chloride (CaCl2 2%), Salicylic Acid (SA 2 mM), hot water treatment alone and fruits without any postharvest treatment as absolute control. Treated fruits, after removal of surface moisture, were stored in corrugated fibre board boxes at room temperature (30±2 ⁰C, RH 80-85%) till the end of shelf life. Superiority of postharvest treatments on papaya cv. Red Lady was assessed based on physiological, biochemical, physical, and sensory attributes during storage at an interval of 3 days. Papaya fruits treated with Salicylic Acid (2 mM) recorded the lowest percentage of physiological loss in weight (6.55%), and respiration rate (74.99 mL CO2 kg-1 h-1) after 9th day of storage where as fruits without any postharvest treatment recorded a weight loss of 16.65% with a respiration rate of 101.92 mL CO2 kg-1 h-1. Fruits with salicylic acid treatment recorded 8.72% total sugars, 6.39% reducing sugars, 7.66 ˚Brix of total soluble solids with a carotenoid content of 2.09 mg 100g-1, and antioxidant activity of 48.35% after 9 days of storage which increased with the storage period and the values were significantly lower than the untreated fruits indicating the delayed ripening of treated fruits. Red Lady papaya fruits without any postharvest treatment (control) recorded the lowest storage life of 7.38 days due 147 to high rate of physiological, biochemical and physical changes which indicated faster ripening and senescence. The treatment of fruits with salicylic acid (SA) recorded the lowest respiration rate of 95.63 mL CO2 kg-1 h-1 and physiological loss in weight (13.10%) after 14 days of storage at room temperature with the highest fruit firmness (19.89 N) and 8.26% reducing sugar, 12.73% total sugar, 11.52 ˚Brix of total soluble solids, 0.14% titratable acidity, 2.55 mg 100g-1 of carotenoid content, and 64.53% of antioxidant activity. The salicylic acid treatment recorded the highest shelf life of 14.56 days with acceptable sensory parameters where as fruits without any treatment (control) recorded a shelf life of 7.38 days. Papaya fruits cv. Red Lady, harvested at colour break stage were sanitized using ozonation (2 ppm) and subjected to hot water treatment (50 ˚C for 20 minutes) followed by dipping for 5 minutes in postharvest treatment with salicylic acid at 2 mM was standardised as the best postharvest treatment for delayed ripening which recorded the longest shelf life of 14.56 days at room temperature as compared to 7.38 days for fruits without any postharvest treatment. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Quality management of Papaya |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Geetha Lekshmi, P R (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://krishikosh.egranth.ac.in/handle/1/5810163433 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Item type | Theses |
| Not for loan | Collection code | Permanent location | Current location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Not For Loan | Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2020-10-08 | 631.56 MEN/PO PG | 174872 | 2020-10-08 | Theses |