บทคัดย่องานวิจัย

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Ripening-related changes in ethylene production, respiration rate and cell-wall enzyme activity in goldenberry (Physalis peruviana L.), a solanaceous species

Gustavo D. Trinchero, Gabriel O. Sozzi, Ana M. Cerri, Fernando Vilella and Adela A. Fraschina

Postharvest biology and technology. Vol: 16 Issue: 2 Pages: 139-145.

1999

บทคัดย่อ

Ripening-related changes in ethylene production, respiration rate and cell-wall enzyme activity in goldenberry (Physalis peruviana L.), a solanaceous species.

The ripening of goldenberry (Physalis peruviana) is associated with a conspicuous climacteric rise in carbon dioxide and ethylene production. Its respiration rate and ethylene biosynthesis can be classified as extremely high. Ethylene yields between 7 and 24 nmol h(-1) per g in the ripe/overripe stages thus compare favorably with production rates previously reported for tomato fruit. As the fruit color turns from green (chlorophyll) to yellowish orange (carotenoids) and a progressive softening occurs, several cell-wall enzyme changes arise. Pectinmethylesterase and alpha- and beta-galactosidase reach activity levels similar to those in tomato fruit. Pectinmethylesterase and alpha-galactosidase increase toward the ripe stage. Alpha-Arabinofuranosidase and beta-glucosidase show lower activities but with an increasing pattern during ripening. On the other hand, polygalacturonase and alpha-glucosidase activities are hardly noticeable.