Low temperature metabolism of apple phenolics and quiescence of Phlyctaena vagabunda.

Abstract

The content of chlorogenic acid, (+)-catechin, (-)-epicatechin, phloretin glycosides, and quercetin glycosides in fresh and stored Golden Delicious apples (Malus domestica Borkh) was determined. The relative amount of phenolics in the peel, with the exception of chlorogenic acid and (-)-epicatechin, was higher than that in the flesh. In addition, quercetin glycosides were detected only in the skin. These compounds were tested for fungicidal activity against Phlyctaena vagabunda Desm., the causal agent of a postharvest rot. Chlorogenic acid only inhibited P. vagabunda spore germination and mycelial growth in vitro. Changes of apple phenolics and polyphenol oxidase activity during cold storage and the biological activity of these phenolics have also been analyzed with reference to the development of quiescent infections during cold storage plus shelf life at room temperature. The results obtained suggested that phloridzin and chlorogenic acid in combination with polyphenol oxidase activity could function to arrest P. vagabunda in quiescent infections associated with immature and ripening apple fruit.

• Authors: V Lattanzio, D Di Venere, V Linsalata, P Bertolini, A Ippolito, M Salerno
• Journal: Journal of agricultural and food chemistry (J Agric Food Chem) Vol. 49 Issue 12 Pg. 5817-21 (Dec 2001) ISSN: 0021-8561 [Print] United States
• PMID: 11743768 (Publication Type: Journal Article)

Chemical References

• Fungicides, Industrial
• Phenols
• Chlorogenic Acid
• Quercetin

Topics

• Chlorogenic Acid (pharmacology)
• Chromatography, High Pressure Liquid
• Fruit (metabolism)
• Fungi (drug effects, growth & development, physiology)
• Fungicides, Industrial (pharmacology)
• Phenols (metabolism)
• Plant Diseases (microbiology)
• Quercetin
• Spores, Fungal (drug effects)
• Time Factors