บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Using volatile emissions and chlorophyll fluorescence as indicators of heat injury in apples.

Song J., Fan L., Forney, C. F. and Jordan, M. A

Journal of the American Society for Horticultural Science, 2001. 126:771-777.

2001

บทคัดย่อ

Using volatile emissions and chlorophyll fluorescence as indicators of heat injury in apples.

Volatile emissions and chlorophyll fluorescence were investigated as potential signals of heat injury for apple (Malus sylvestris var. domestica) fruit. 'McIntosh', 'Cortland', 'Jonagold', and 'Northern Spy' apples were exposed to 46 deg C for 0, 4, 8, or 12 h (heat treatments). Following treatments, fruits were kept at 20 deg C and evaluated after 1, 2, 4, or 7 days. Heat treatments induced volatile production including ethanol and ethyl acetate. The 8 and 12 h heat treatments increased ethanol and ethyl acetate production in all four cultivars by as much as 170- and 11-fold, respectively, one day after treatment. Heat treatments also reduced ethylene production and chlorophyll fluorescence. Heat for 12 h caused serious flesh browning. Among the cultivars investigated, 'Northern Spy' and 'McIntosh' were most susceptible to heat stress based on the degree of flesh browning. Correlation coefficients of heat stress induced ethanol emission and chlorophyll fluorescence with flesh browning were 0.82 and -0.66, respectively. The non-destructive measurements of ethanol emission and chlorophyll fluorescence have potential to identify stressed fruit with reduced quality or compromised storage life.