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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Phytoalexin elicitation grape berries and their susceptibility to Rhizopus stolonifer
Year:
1997
Authors :
זוטחי, יוחנן
;
.
ליסקר, נורברטו
;
.
מונג'אוזה, א'
;
.
שריג, פנחס
;
.
Volume :
50
Co-Authors:
Sarig, P., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Zutkhi, Y., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Monjauze, A., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Lisker, N., Department of Agronomy, Agricultural Research Organization, Ber-Dagan 50250, Israel
Ben-Arie, R., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Facilitators :
From page:
337
To page:
347
(
Total pages:
11
)
Abstract:
The phytoalexins resveratrol and pterostilbene were produced in berries of Vitis vinifera following inoculation with Rhizopus stolonifer. The amounts produced in cv. Perlette were similar to those elicited by exposure to u.v.-C irradiation (254 nm) for 10 min. The time course for the accumulation of both stilbenes differed for each method of elicitation. Maximum resveratrol accumulation in grape berries was 4.0-8.5 times higher than that of pterostilbene depending on cultivar. Both stilbenes reached highest concentrations 24 h after inoculation and thereafter these declined gradually. Following u.v.-C irradiation, resveratrol reached its highest concentration 18 h after exposure and this declined rapidly thereafter; whilst pterostilbene reached its peak after approximately 40 h. This pattern was observed in all cultivars at all stages of development. The phytoalexins were fungitoxic in vitro, inhibiting spore germination and hyphal growth of R. stolonifer and Botrytis cinerea. The dosage required to inhibit each pathogen was higher than that which accumulated in treated berries. A negative correlation was found between the potential for resveratrol accumulation in different cultivars and their susceptibility to decay caused by R. stolonifer. Phytoalexin accumulation declined with advancing maturity of the berries, coinciding with their increased susceptibility.
Note:
Related Files :
Bacteria (microorganisms)
Botryotinia fuckeliana
Botrytis
Rhizopus stolonifer
Vitis sp.
Vitis vinifera
עוד תגיות
תוכן קשור
More details
DOI :
10.1006/pmpp.1997.0089
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
25880
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:18
Scientific Publication
Phytoalexin elicitation grape berries and their susceptibility to Rhizopus stolonifer
50
Sarig, P., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Zutkhi, Y., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Monjauze, A., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Lisker, N., Department of Agronomy, Agricultural Research Organization, Ber-Dagan 50250, Israel
Ben-Arie, R., Dept. Postharvest Sci. Fresh Prod., Agricultural Research Organization, Ber-Dagan 50250, Israel
Phytoalexin elicitation grape berries and their susceptibility to Rhizopus stolonifer
The phytoalexins resveratrol and pterostilbene were produced in berries of Vitis vinifera following inoculation with Rhizopus stolonifer. The amounts produced in cv. Perlette were similar to those elicited by exposure to u.v.-C irradiation (254 nm) for 10 min. The time course for the accumulation of both stilbenes differed for each method of elicitation. Maximum resveratrol accumulation in grape berries was 4.0-8.5 times higher than that of pterostilbene depending on cultivar. Both stilbenes reached highest concentrations 24 h after inoculation and thereafter these declined gradually. Following u.v.-C irradiation, resveratrol reached its highest concentration 18 h after exposure and this declined rapidly thereafter; whilst pterostilbene reached its peak after approximately 40 h. This pattern was observed in all cultivars at all stages of development. The phytoalexins were fungitoxic in vitro, inhibiting spore germination and hyphal growth of R. stolonifer and Botrytis cinerea. The dosage required to inhibit each pathogen was higher than that which accumulated in treated berries. A negative correlation was found between the potential for resveratrol accumulation in different cultivars and their susceptibility to decay caused by R. stolonifer. Phytoalexin accumulation declined with advancing maturity of the berries, coinciding with their increased susceptibility.
Scientific Publication
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