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פותח על ידי קלירמאש פתרונות בע"מ -
Preformed and induced antifungal materials of citrus fruits in relation to the enhancement of decay resistance by heat and ultraviolet treatments
Year:
1992
Authors :
בן-יהושע, שמשון
;
.
Volume :
40
Co-Authors:
Ben-Yehoshua, S., Department of Fruit and Vegetable Storage, ARO, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
1217
To page:
1221
(
Total pages:
5
)
Abstract:
Two mechanisms of the resistance of citrus fruits against pathogens - preformed and induced antifungal materials - were investigated. Flavedo tissue of lemon contains the following preformed antifungal materials: citral, limettin, 5-geranoxy-7-methoxycoumarin, and isopimpinellin, which act as the first line of defense against pathogens. Exogenous application of citral to Penicillium-inoculated lemon fruit prevented development of decay. Being subjected to fungal challenge and/or abiotic stress, citrus fruits are elicited to produce the phytoalexin scoparone, considered as another line of fruit defense. According to median effective dose (ED50) of the inhibition of germ-tube elongation or percent germination, scoparone had higher fungitoxicity against Penicillium digitatum Sacc. than the preformed antifungal materials. Different citrus species (lemon, orange, grapefruit, lime, kumquat) varied in their capacities to produce scoparone responding to the combined Penicillium inoculation and heat treatment or to UV illumination. UV illumination of lemon fruit reduced its susceptibility to P. digitatum. Expression of this effect was directly related to the level of scoparone in illuminated fruit. UV light and citral application were visibly injurious to the flavedo tissues in high dose. © 1992 American Chemical Society.
Note:
Related Files :
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More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31861
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:05
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Scientific Publication
Preformed and induced antifungal materials of citrus fruits in relation to the enhancement of decay resistance by heat and ultraviolet treatments
40
Ben-Yehoshua, S., Department of Fruit and Vegetable Storage, ARO, Volcani Center, Bet Dagan 50250, Israel
Preformed and induced antifungal materials of citrus fruits in relation to the enhancement of decay resistance by heat and ultraviolet treatments
Two mechanisms of the resistance of citrus fruits against pathogens - preformed and induced antifungal materials - were investigated. Flavedo tissue of lemon contains the following preformed antifungal materials: citral, limettin, 5-geranoxy-7-methoxycoumarin, and isopimpinellin, which act as the first line of defense against pathogens. Exogenous application of citral to Penicillium-inoculated lemon fruit prevented development of decay. Being subjected to fungal challenge and/or abiotic stress, citrus fruits are elicited to produce the phytoalexin scoparone, considered as another line of fruit defense. According to median effective dose (ED50) of the inhibition of germ-tube elongation or percent germination, scoparone had higher fungitoxicity against Penicillium digitatum Sacc. than the preformed antifungal materials. Different citrus species (lemon, orange, grapefruit, lime, kumquat) varied in their capacities to produce scoparone responding to the combined Penicillium inoculation and heat treatment or to UV illumination. UV illumination of lemon fruit reduced its susceptibility to P. digitatum. Expression of this effect was directly related to the level of scoparone in illuminated fruit. UV light and citral application were visibly injurious to the flavedo tissues in high dose. © 1992 American Chemical Society.
Scientific Publication
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