Abstract
Content of organic acids, lutein, α-tocopherol and D-mannoheptulose in the mesocarp of avocado (Persea americana Mill.) fruits were analyzed. The differences among cultivars and the effect of ripening on the content of D-mannoheptulose were investigated in order to set up the basic nutrient data of domestic avocados. Six avocado cultivars including, ‘Ching Jin No.1’, ‘Zhang an’, ‘Choquette’, ‘Hall’, ‘CASE3’ and ‘Madoupu’ avocado were harvested from Jhu-ci area, Chiayi County. Results showed that in ripe mesocarp of avocado, the contents of organic acid are 1475~572 μg/g among cultivars. Contents of galaturonic acid, tartaric acid, malic acid, citric acid, and fumaric acid are 268~98.9, 230~130, 573~79.1, 683~193, and 5.28~27.0 μg/g respectively. The content of lutein is from 5.34 to 1.94 μg/g. There is more lutein in ‘CASE3’ than in others. The content of α-tocopherol is from 80.9 to 19.3 μg/g. ‘Madoupu’ contents the highest α-tocopherol among six cultivars. In unripe avocado flesh, the content of D-mannoheptulose is from 41.5 to 11.8 mg/g and ‘Choquette’ has the highest content. Ripe fruits content 27.1~9.50 mg/g of D-mannoheptulose and ‘Madoupu’ has the highest content among six cultivars.
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