INTEGRATED APPROACHES FOR REDUCING POST HARVEST LOSS AND ENHANCEMENT OF SHELF LIFE IN PAPAYA (Carica papaya L.)

dc.contributor.advisorD. L. RUDRESH
dc.contributor.advisorN. BASAVARAJA
dc.contributor.advisorMESTA, RAGHAVENDRA K.
dc.contributor.advisorAWATI, MALLIKARJUN G.
dc.contributor.advisorJHALEGAR, MD JAMEEL.
dc.contributor.authorKOLHAR, AYEESHYA HASANSAB.
dc.date.accessioned2024-05-15T11:20:35Z
dc.date.available2024-05-15T11:20:35Z
dc.date.issued2022-01
dc.description.abstractThe present investigation entitled “Integrated approaches for reducing post harvest loss and enhancement of shelf life in papaya (Carica papaya L.)” was conducted in the Department of Post Harvest Technology, College of Horticulture, Bagalkot, Karnataka during the year 2019-2021. The fruits of papaya cv. Red Lady were imposed with chemical elicitors, physical and biocontrol agents alone and in combination followed by storage at ambient condition. Various physiological and physico-chemical changes were recorded during storage at the known interval in different experiments. Papaya fruits treated with chitosan at 1 per cent (T3) exhibited minimum physiological loss in weight (PLW) (13.40%), respiration rate (11.55 ml CO2/Kg), per cent disease index (PDI) (13.33%) and instrumental colour values i.e., L* (59.00), a* (13.65) and b* (50.48). Maximum fruit firmness (41.88 N), total soluble solids (TSS) (12.13%), titratable acidity (TA) (0.25%), β carotene content (1.89 mg/100 g) and good scores for sensory attributes such as colour and appearance of the fruit surface (6.93/9.00), pulp colour (6.70/9.00), texture (7.10/9.00), flavour and taste (7.00/9.00) and overall acceptability (6.94/9.00) were obtained by these fruits at 9th day of storage. In addition these fruits exhibited maximum shelf-life of 8.33 days. Among the various biocontrol agent fruits treated with Bacillus amyloliquefaciens UHSBBA9 (T4) had recorded higher shelf life of 8.00 days. The treated fruits also have exhibited minimum PLW (15.93%), instrumental colour values i.e., L* (57.45), a* (17.03), b* (50.41) values and PDI (13.33%). The treated fruits have also recorded maximum fruit firmness (26.30 N), TA (0.21%), TSS (11.67%), β carotene content (1.67 mg/100 g), with good sensory attributes in terms of colour and appearance of the fruit surface (6.67/9.00), pulp colour (6.60/9.00), texture (6.70/9.00), flavour-taste (6.50/9.00) and overall acceptability (6.58/9.00) at 9th day of storage. With respect to physical treatments fruits treated with hot water at 54ºC for 4 min (T2) and packed in chlorine-zeolite LDPE package (T6) were found to be better in 263 many attributes. At 9 DAS the hot water (54ºC for 4 min) treated fruits had recorded minimum PLW (15.63%), PDI (53.33%), instrumental colour values i.e., L* (54.36), a* (18.85), b* (53.57) and higher TSS (11.53%), TA (0.18%), fruit firmness (28.39 N), β carotene (1.64 mg/100 g). With higher score for sensory attributes such as colour and appearance of the fruit (7.13/9.00), pulp colour (7.07/9.00), texture (7.13/9.00), flavourtaste (7.23/9.00) and overall acceptability (7.14/9.00). In addition these fruits had recorded maximum shelf life of 8 days. The chlorine zeolite LDPE package (T6) packed fruits exhibited maximum shelf life (8 days). In addition, these fruits exhibited minimum PLW (15.11%), PDI (50.00%), instrumental colour values i.e., L* (54.72), a* (18.60), b* (52.41) and maximum TSS (11.60%), TA (0.20%), fruit firmness (30.51 N), β carotene content (1.66 mg/100 g). The treated fruits also recorded highest score for various sensory attributes i.e., colour and appearance of the fruit (7.07/900), pulp colour (7.00/9.00), texture (7.20/9.00), flavour-taste (7.17/9.00) and overall acceptability (7.17/9.00) at 9 DAS. With respect to the effect of combined application of chemical, biological and physical elicitors on papaya fruits. The fruits of treatment T6 (HWT + Chitosan at 1%), T9 (Chitosan at 1% + B. amyloliquefaciens UHSBBA9), T10 (Chitosan at 1% + Chlorine-zeolite composite LDPE package), T12 (HWT + Chitosan at 1% + Chlorinezeolite composite LDPE package), T13 (Chitosan at1% + B. amyloliquefaciens UHSBBA9 + Chlorine-zeolite composite LDPE package) and T14 (HWT at 54°C for 4 min + Chitosan at 1% + B. amyloliquefaciens UHSBBA9 + Chlorine zeolite composite LDPE package) had minimum PLW, PDI and maximum shelf-life (10 days). In addition these treatments had retained quality attributes such as, TSS, TA, fruit firmness, β carotene content, ascorbic acid content and sensory attributes at 10 DAS. The fruits subjected to combined application of chitosan at 1% + B. amyloliquefaciens UHSBBA9 (T3) had recorded higher total phenol content (24.41 mg/100g), antioxidant capacity (3.30 μmol Trolox/g) minimum malondialdehyde content (0.90 nmol/g FW) and lower activities of enzymes pectin methylesterase (0.30 μmol-1min-1 g -1 FW) and polygalacturonase (0.37 μmol-1min-1 g -1 FW) at 10 DAS.
dc.identifier.otherUHS17PGD223
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810209000
dc.keywordsHorticulture
dc.keywordsPost Harvest Technology
dc.keywordsPapaya
dc.keywordsRed Lady
dc.keywordsElicitors
dc.keywordsChemical
dc.keywordsBiocontrol
dc.keywordsAmbient
dc.keywordsPhysiological
dc.keywordsPhysicochemical
dc.keywordsSoluble Solids
dc.keywordsTitratable Acidity
dc.keywordsβ carotene
dc.keywordsFlavour
dc.keywordsShelf Life
dc.keywordsBacillus
dc.keywordsAmyloliquefaciens
dc.keywordsSensory
dc.keywordsTexture
dc.keywordsChlorine Zeolite
dc.keywordsChitosan
dc.keywordsMalondialdehyde
dc.keywordsMethylesterase
dc.keywordsPolygalacturonase
dc.keywordsEnzymes
dc.keywordsCarica papaya L.
dc.keywordsUHS17PGD223
dc.keywordsT885
dc.language.isoEnglish
dc.pages284p. (Due to pdf. conversion there is a difference in pages of soft copy and hard copy).
dc.publisherUniversity of Horticultural Sciences, Bagalkot. (College of Horticulture, Bagalkot).
dc.subPost Harvest Technology
dc.themeINTEGRATED APPROACHES FOR REDUCING POST HARVEST LOSS AND ENHANCEMENT OF SHELF LIFE IN PAPAYA (Carica papaya L.)
dc.these.typePh.D
dc.titleINTEGRATED APPROACHES FOR REDUCING POST HARVEST LOSS AND ENHANCEMENT OF SHELF LIFE IN PAPAYA (Carica papaya L.)
dc.typeThesis
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
AYEESHYA HASANSAB KOLHAR UHS17PGD223.pdf
Size:
3.79 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Collections