บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Influence of post-harvest techniques on the quality of horticultural products.

Pratella, G. C.; Folchi, A.;

Informatore Agrario Year: 1993 Vol: 49 Issue: 6, Supplemento Pages: 49-55

1993

บทคัดย่อ

A suggestion for new mechanism of celery resistance to pathogens.

Furanocoumarins (psoralens) produced by celery and many other plants are considered a high risk to human health. When these compounds are exposed to long-wave UV light or sunlight the phototoxic furanocoumarins become carcinogenic agents, recognized as causally-related to skin cancer by the World Health Organization (IARC). Psoralens are believed to be phytoalexins associated with resistance of celery to pathogens. However, psoralens were found to have only weak antifungal activity against Botrytis cinerea on the variety Tender Crisp in vitro, so an alternative mechanism for celery resistance to pathogens during storage is proposed. This mechanism involves two newly isolated coumarins, marmesin and columbianetin. These are precursors of psoralens in celery and have at least 100 times greater antifungal activity in vitro than psoralens and may be associated with celery resistance to pathogens. This suggestion is based on the observation that increased susceptibility of celery to pathogens following storage for one month at 0 deg C was accompanied by an increase in psoralen concentration and a corresponding decrease in marmesin and columbianetin concentrations.