Physiological changes in ‘Pusa Manohari’ and ‘Amrapali’ mangoes: on-tree vs off-tree
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https://doi.org/10.58993/ijh/2025.82.2.7Keywords:
Harvesting, fruit firmness, respiration rate, colour, ripeningIssue
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Copyright (c) 2025 Shubhangi Nile, Sangeeta Chopra, Devinder Dhingra, P. K. Sahoo, Rouf Ahmad Parray, Manish Srivastava, Mrinmoy Ray, Shivani Nagar, Randolph Beaudry

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Physiological changes were studied in ‘Pusa Manohari’ and ‘Amrapali’ mangoes during on-tree and off-tree ripening. On-tree, sugar levels remained relatively stable between 9 and 11ºBrix, respiration was slow (with ‘Pusa Manohari’ exhibiting a slightly higher respiration rate compared to ‘Amrapali’, ranging from 200-190 mg CO2 kg-1 hr-1 for PM and 150-140 mg CO2 kg-1 h-1 for AP), and softening gradual, suggesting the tree regulates ripening. In contrast to the stable on-tree behavior of both the cultivars of the mangoes, off-tree, sugar levels increased significantly (7-25ºBrix), respiration accelerated, and rapid softening was recorded. Later harvests ripened faster off-tree. On-tree firmness decreased gradually in ‘Pusa Manohari’ from 100 to 70 N in 58 days, and ‘Amrapali’ from 90 to 70 N in 48 days. Off-tree, both cultivars softened rapidly to approximately 20 N within 20 days. Respiration rates remained consistent across harvests for ‘Pusa Manohari’ off-tree. Pulp color exhibited lower lightness (higher L* values) compared to peel color. The study revealed a flexible harvest window, with earlier harvests potentially extending shelf life. Both cultivars exhibited similar trends in on-tree and off-tree ripening.Abstract
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