Articles
Mineral content and maturity indices at harvest in relation to stem end flesh browning development in ‘Gala’ apples after long-term ultra-low O2 storage
Article number
1432_4
Pages
29 – 36
Language
English
Abstract
‘Gala’ apples can be susceptible to development of stem end flesh browning (SEFB) during storage and the shelf-life period.
In this trial we investigated the relationship between mineral content and maturity of ‘Gala’ apples at harvest with SEFB incidence of fruit that were stored in 0.5 kPa O2 and 1 kPa CO2 at 0.5°C for 8 months, plus 7 days at 20°C. Fruit were harvested from 24 orchard blocks in three New York state growing regions (Hudson Valley, Western NY, Champlain Valley) in 2021. Correlations between maturity indices and SEFB depended on growing region, internal ethylene concentration, starch pattern index (SPI). Color based on a* and b* values were positively correlated, while firmness and the index of absorbance difference (IAD) value were negatively correlated, with disorder incidence.
For the multifactor model, soluble solids concentration, SPI, and IAD values showed regression coefficient of 0.8 with SEFB. Correlations between fruit mineral content and SEFB incidence varied by region, being more pronounced in the Champlain Valley compared to other regions.
For the multi-region model, fruit minerals showed low regression coefficient with SEFB development.
Fruit maturity indices demonstrated greater reliability in predicting SEFB compared with fruit mineral content.
In this trial we investigated the relationship between mineral content and maturity of ‘Gala’ apples at harvest with SEFB incidence of fruit that were stored in 0.5 kPa O2 and 1 kPa CO2 at 0.5°C for 8 months, plus 7 days at 20°C. Fruit were harvested from 24 orchard blocks in three New York state growing regions (Hudson Valley, Western NY, Champlain Valley) in 2021. Correlations between maturity indices and SEFB depended on growing region, internal ethylene concentration, starch pattern index (SPI). Color based on a* and b* values were positively correlated, while firmness and the index of absorbance difference (IAD) value were negatively correlated, with disorder incidence.
For the multifactor model, soluble solids concentration, SPI, and IAD values showed regression coefficient of 0.8 with SEFB. Correlations between fruit mineral content and SEFB incidence varied by region, being more pronounced in the Champlain Valley compared to other regions.
For the multi-region model, fruit minerals showed low regression coefficient with SEFB development.
Fruit maturity indices demonstrated greater reliability in predicting SEFB compared with fruit mineral content.
Authors
Y. Al Shoffe, C.B. Watkins
Keywords
Malus domestica, micro and macro elements, controlled atmosphere storage, physiological disorders
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