Articles
Some cultivars of Indian mangoes are better stored on the tree than harvested and treated with 1-MCP
Article number
1458_28
Pages
215 – 218
Language
English
Abstract
This study aimed to assess differences in the ripening behavior of ‘Pusa Manohari’ and ‘Amrapali’ mango (Mangifera indica) fruit while attached to the tree and after harvest, following treatment with single and continuous doses of 1-methylcyclopropene (1-MCP). On-tree mangoes, grown at ICAR-IARI, Delhi, India, were freshly harvested every 3 days, starting 103 days after flowering, from an IARI orchard and evaluated after a 4-h incubation at 27°C. These on-tree mangoes were tested for internal and external color, firmness, total soluble solids (TSS), and density.
Additionally, mangoes harvested on the 6th, 16th, 22nd, and 42nd day from the start date were stored (off-tree) at 27°C. 1-MCP treatments (10 μL L‑1) were given as a single dose on the day of harvest or given as multiple (daily) doses for 7 consecutive days.
These off-tree mangoes were evaluated for quality characteristics over the storage duration.
Over the 60-day study period, on-tree mangoes exhibited negligible changes in TSS until harvest, at which point ripening and starch conversion were rapid.
Starch conversion rate was maturity-dependent, increasing as the harvest season progressed.
The rates of change in skin color, flesh color, time to climacteric, and fruit firmness were also markedly slowed by retaining fruit on the tree.
Single doses of 1-MCP had no effect on any ripening parameters.
Multiple/continuous doses of 1-MCP produced a slight delay in the ripening of ‘Pusa Manohari’, but not ‘Amrapali’. The mangoes left on the tree took longer to ripen than those harvested and stored under ambient conditions, even when treated with 1-MCP. The data suggest that, lacking refrigeration, the best option for retaining fruit quality in these two mango cultivars is to delay harvest.
The nature of the tree’s inhibitory action on ripening is unknown.
Additionally, mangoes harvested on the 6th, 16th, 22nd, and 42nd day from the start date were stored (off-tree) at 27°C. 1-MCP treatments (10 μL L‑1) were given as a single dose on the day of harvest or given as multiple (daily) doses for 7 consecutive days.
These off-tree mangoes were evaluated for quality characteristics over the storage duration.
Over the 60-day study period, on-tree mangoes exhibited negligible changes in TSS until harvest, at which point ripening and starch conversion were rapid.
Starch conversion rate was maturity-dependent, increasing as the harvest season progressed.
The rates of change in skin color, flesh color, time to climacteric, and fruit firmness were also markedly slowed by retaining fruit on the tree.
Single doses of 1-MCP had no effect on any ripening parameters.
Multiple/continuous doses of 1-MCP produced a slight delay in the ripening of ‘Pusa Manohari’, but not ‘Amrapali’. The mangoes left on the tree took longer to ripen than those harvested and stored under ambient conditions, even when treated with 1-MCP. The data suggest that, lacking refrigeration, the best option for retaining fruit quality in these two mango cultivars is to delay harvest.
The nature of the tree’s inhibitory action on ripening is unknown.
Authors
S. Nile, S. Chopra, M. Srivastava, P.K. Sharma, P.K. Sahoo, R. Parray, R. Beaudry
Keywords
‘Pusa Manohari’, ‘Amrapali’, Mangifera indica
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