Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8881755 | Postharvest Biology and Technology | 2018 | 8 Pages |
Abstract
The objective of this investigation was to evaluate the quality parameters and aroma profiles of Conference and Alexander Lucas pears after 7 months of storage. Fruits of both cultivars were harvested at two different maturity stages and stored under cold (CS) (20.9âkPa O2 + <0.04âkPa CO2), controlled atmosphere (CA) (2âkPa O2 + <0.7âkPa CO2) and ultra-low oxygen condition (ULO) (0.7âkPa O2 + <0.7âkPa CO2). CS and CA storage also included treatment with 1-methylcyclopropene (1-MCP) at 300ânL Lâ1. After seven months of storage at 0â±â0.1â°C and 94â±â2% RH plus seven days at 20â±â2â°C and 60â±â5% RH, fruits were evaluated for flesh firmness, peel color ('hue' angleâ=âh°), soluble solids content (SSC), titratable acidity (TA), respiratory rate, ethylene production rate, and production of aromatic compounds. Fruits of both cultivars from the first maturity stage treated with 1-MCP did not develop a buttery texture or yellow color and produced significantly less alcohols and esters. A combination treatment (1-MCPâ+âCA) most severely suppressed aroma development, particularly in the Conference cultivar. ULO storage also reduced yellowing, ethylene production and the development of aromatic compounds in both cultivars from the first maturity stage, but this reduction was less pronounced than that observed for 1-MCP treatments. The production of aromatic compounds was lower in fruits from ULO, regardless of their maturity stage. Fruits from the second harvest treated with 1-MCP had significantly more aromatic compounds than did those from the first harvest. In general, the CA condition has no effect on the ripening and production of aromatic compounds in both cultivars compared to CS.
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Authors
Marcos VinÃcius Hendges, Daniel Alexandre Neuwald, Cristiano André Steffens, Rajko Vidrih, Emil ZlatiÄ, Cassandro Vidal Talamini do Amarante,