ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Resistance of citrus fruits to Penicillium italicum.

Arras, G. G.; Sanna, P.;

Mededelingen - Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen, Universiteit Gent Year: 1999 Vol: 64 Issue: 3b Pages: 527-530 Ref: 6 ref.

1999

บทคัดย่อ

Postharvest fruit and vegetable losses are mainly due to microorganisms (Penicillium spp.) which usually infect through wounds and abrasions. However it is well-known that fruits have natural defence mechanisms that are shown by the formation of lignin, enzymes phytoalexins etc. at the wound site. In this work we report the different resistance capacity of Citrus fruits to Penicillium italicum. Artificially wounded fruits were inoculated with 10 ml of a conidial suspension of P. italicum at the concentration of 105 conidia/ml at different times (1, 6, 12, 24 and 48 h) and at different ripening stages, to observe the natural resistance of the fruit to the pathogen. The results show a significant increase of the inhibition percentage when the time between wounding and inoculation increases, compared to the control. In particular, Fairchild, Carvalhal and Biondo fruits, harvested completely ripe, showed a greater defence capacity at 48 hours (88%, 85% and 91.2%), compared to satsuma fruits (66%).