บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Preformed antifungal compounds of lemon fruit: citral and its relation to disease resistance.

Rodov, V.; Ben-Yehoshua, S.; Fang, D. Q.; Kim, J. J.; Ashkenazi, R.;

Journal of Agricultural and Food Chemistry Year: 1995 Vol: 43 Issue: 4 Pages: 1057-1061 Ref: 24 ref.

1995

บทคัดย่อ

Preformed antifungal compounds of lemon fruit: citral and its relation to disease resistance.

ABSTRACT :

 

Young mature-green lemon fruit manifests a significantly lower level of postharvest decay compared with older yellow fruit. Inoculation with Penicillium digitatum demonstrated that the resistance of young fruit to decay is related to a factor localized in the oil glands of the flavedo. The main antifungal compound of lemon flavedo was identified as the monoterpene aldehyde citral. The flavedo of green lemon contained 1.5-2 times higher levels of citral compared with the yellow fruit. In parallel with citral decline, the flavedo extracts of yellow lemons exhibited an increased level of the monoterpene ester neryl acetate, which exerted practically no inhibitory activity against P. digitatum and, in concn of <500 p.p.m., stimulated development of the pathogen. During long-term storage of lemon fruit, citral concn decreased in parallel with the decline of antifungal activity in the peel and with an increase of decay incidence. It is suggested that the level of citral in the flavedo is related to th

e resistance of lemon fruit to postharvest decay.