Journal
POSTHARVEST BIOLOGY AND TECHNOLOGY
Volume 54, Issue 3, Pages 123-130Publisher
ELSEVIER
DOI: 10.1016/j.postharvbio.2009.07.010
Keywords
Carica papaya L.; Intercellular space; Microscopy; Ripening
Categories
Funding
- FINEP
- FAPERJ
- CNPq
- CAPES
- Caliman Agricola S/A
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In this work the gas diffusion of 'Golden' papaya fruit (Carica papaya L.) was evaluated as a function of different maturity stages, by using a photoacoustic spectrometer. The maturity stages were characterized by the anatomical changes, membrane integrity, pulp firmness, and skin color. Microstructural analysis was performed by means of light and scanning electron microscopy. A significant decrease in the diffusion rate with ripening was observed. Under the experimental conditions it was found that fruit in maturity stage 0 (less mature) had turgid, regular shape parenchyma cells, and relatively little intercellular spaces. However, fruit in maturation stage 5 (more mature) showed separation of cell walls and pectic substance accumulation into the intercellular spaces. The skin color showed a reduction in hue angle values and an increase in chromaticity parameters a* and b*, characterizing the loss of green color during ripening. A loss of firmness of the pulp was also observed during fruit ripening. (C) 2009 Elsevier B.V. All rights reserved.
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