Abstract
The current study explores innovative strategies for extending the postharvest shelf life of guava under high humidity and temperature conditions prevalent in sub-tropical regions with composite edible coatings to guava fruits and analyzing their impact on key physiological parameters. Results reveal that the composite Olive oil with texture enhancer + Antioxidant (OTE + AO) treatment consistently maintained superior fruit firmness throughout storage, with a remarkable reduction in softening by 34.3% compared to uncoated controls. Composite edible coatings viz. Olive oil with texture enhancer (OTE), Sodium alginate with texture enhancer + Antioxidant (STE + AO), and Aloe vera with texture enhancer + Antioxidant (ATE + AO) exhibited elevated titratable acidity levels on the third day of storage, surpassing the control by 10–15%, indicating potential for extended shelf life. Moreover, coated fruits exhibited sustained total sugar levels, with OTE + AO treatment demonstrating a significant 8.5% increase compared to controls after fifteen days. Notably, the OTE + AO and OTE treatments showcased the least decline in total flavonoid content throughout storage, maintaining 12–15% higher levels than uncoated counterparts. These displayed substantial efficacy in mitigating polyphenol oxidase activity, reducing enzymatic browning by 32.7–34.3%. Preserving superoxide dismutase activity in coated treatments, resulting in 10–15% increased levels, indicates enhanced antioxidant defence systems. This study’s results have found the possibility of extending guava’s shelf life with optimum biochemical properties with composite coatings.
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The authors duly acknowledge the technical and financial supports received from G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India.
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All the authors have contributed equally. KK: experimentation, planning, data collection; AK: experimentation, planning, data collection; OS: conceptualization, review; PD: manuscript preparation, data analysis, overall planning.
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Kohli, K., Kumar, A., Singh, O. et al. Composite edible coatings can extend shelf-life and maintain postharvest qualities of guava under natural storage. Hortic. Environ. Biotechnol. (2024). https://doi.org/10.1007/s13580-023-00576-1
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DOI: https://doi.org/10.1007/s13580-023-00576-1