บทคัดย่องานวิจัย

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Water loss and ethylene as non-destructive symptoms of chilling injury in Eureka lemons.

Leguizamon, G., Luchsinger, L.,and Razeto, B.

ISHS Acta Horticulturae 553: 297-298.

2001

บทคัดย่อ

Water loss and ethylene as non-destructive symptoms of chilling injury in 'Eureka' lemons.

The use of water loss and ethylene evolution rate (EER) as chilling injury (CI) indicators was studied in lemon cv. Eureka obtained from a commercial orchard in Chile. Green and yellow Eureka were harvested on 14 March (summer) and 4 July (winter) [date not given], and were stored at 0, 5 and 13 deg C. Water loss was measured as weight loss after 1, 3, 4 and 6 weeks, and after 6 weeks plus a week at 20 deg C as a symptom manifestation period (SMP). The EER was measured after 3 weeks and after 6 weeks plus SMP. Mature fruits harvested in winter produced more ethylene than green ones harvested in summer. This difference persisted until after 3 weeks of cold storage, when the ethylene levels had reached their maximum. At the end of cold storage, fruits stored at 0 and 5 deg C showed the greatest ethylene production. Summer fruits lost more weight than winter ones. The observed CI symptoms were pitting, peteca, membranosis and albedo browning. Values of the Pearson coefficient, r, between water loss and internal injury were 0.87, 0.64 and 0.56 in the 1st, 3rd and 4th weeks, respectively. Correlations between EER and CI were moderate, with r=0.4. Results suggest that EER and, especially, water loss, measured during the early stages of cold storage could be used as non-destructive indicators of chilling injury.