| Full text | |
| Author(s): |
Galli, J. A.
;
Palharini, M. C. de A.
;
Torres, E. M. J.
;
Michelotto, M. D.
;
Fischer, I. H.
;
Bertani, R. M. de A.
;
Martins, A. L. M.
;
Valero, D
;
Serrano, M
;
Gill, M
Total Authors: 10
|
| Document type: | Journal article |
| Source: | VI INTERNATIONAL CONFERENCE POSTHARVEST UNLIMITED; v. 1256, p. 6-pg., 2019-01-01. |
| Abstract | |
Brazil is the largest producer of guavas, but the exported volume is small because of their short shelf life. This research aims to optimize the storage conditions to preserve the physical-chemical characteristics from the freshly harvested fruit. Seven treatments were applied after harvest of guava fruits genotype L5P10 cultivated in organic system: fruits covered with biofilm of manioc starch and stored at 25 degrees C for 2 days (MS2d25 degrees C) or at 10 degrees C for 4 days (MS4d10 degrees C), fruits packed in PVC film and stored at 25 degrees C for 2 days (PVC2d25 degrees C) or at 10 degrees C for 4 days (PVC4d10 degrees C), uncoated fruits stored at 25 degrees C for 2 days (UF2d25 degrees C) or at 10 degrees C for 4 days (UF4d10 degrees C), and fruits stored at room temperature (28-30 degrees C) for 24 h (control). The fruits were evaluated for: skin colour, pulp colour, firmness, soluble solids, titratable acidity, ratio SS-TA, pH, ascorbic acid content and percentage of mass loss. The data were submitted to multivariate analysis using hierarchical cluster analysis techniques by UPGMA and principal component analysis (PCA). The UPGMA analysis showed the formation of three groups, the treatment PVC4d10 degrees C being the most similar to the control (Euclidean distance 2.54), and the treatment UF2d25 degrees C, the more divergent (6.43) from the control. In PCA, 80.01% of the variation in the original data was explained by the first two principal components. This analysis showed that the treatments PVC4d10 degrees C and control were similar and showed higher values of SC, SS, and lower value of %LM. The Biplot graphic illustrated the divergence of the treatment UF2d 25 degrees C compared to the others and to the control. The multivariate analyses were useful for discriminating the storage conditions, and suggest that fruits packed with PVC film and stored for four days at 10 degrees C maintained its features closer to freshly harvested fruits, mainly regarding the skin colour and the soluble solids content. (AU) | |
| FAPESP's process: | 16/15647-8 - QUALITY ORGANIC GUAVA PRODUCTION: PEST AND DISEASE CONTROL AND POST-HARVEST TREATMENT |
| Grantee: | Juliana Altafin Galli |
| Support Opportunities: | Regular Research Grants |