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The germicidal and hormetic effects of UV-C light on reducing brown rot disease and yeast microflora of peaches
Year:
1998
Source of publication :
Crop Protection
Authors :
Chalutz, Edo
;
.
Droby, Samir
;
.
Volume :
17
Co-Authors:
Stevens, C., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Khan, V.A., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Lu, J.Y., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Wilson, C.L., USDA/ARS, Appalachian Fruit Research Station, Kearneysville, WV 25430, United States
Pusey, P.L., USDA/ARS, Fruit Tree Research, Laboratory, Wenatchee, WA 98801, United States
Kabwe, M.K., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Igwegbe, E.C.K., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Chalutz, E., ARO, Volcani Center, Bet Dagan, 50250, Israel
Droby, S., ARO, Volcani Center, Bet Dagan, 50250, Israel
Facilitators :
From page:
75
To page:
84
(
Total pages:
10
)
Abstract:
The application of ultraviolet light-C doses (254 nm, UV-C) was used to determine the germicidal and hormetic effects on reducing brown rot of 'Elberta' peaches which were naturally and artificially inoculated with Monilinia fructicola. The results showed that a negative relationship existed between UV-C doses, colony forming units of the fungus, and the number of brown rot lesions. Also, the results of our study showed that the hormetic (beneficial) effect of low UV-C dose of 7.5 kJ m-2 induced host resistance by controlling latent brown rot infection. The hormetic effects of UV-C on peaches was photoreversed with visible light and resulted in the reduction of host resistance to brown rot. Furthermore, the results indicated that UV-C doses increased phenylalanine ammonia-lyase activity, delayed ripening and suppressed ethylene production. Additionally, the population of epiphytic yeast (Debaryomyces hansenii) increased curvilinearly on peach surfaces following UV-C irradiation up to 7.5 kJ m-2. Evaluation of the yeast population on the peach surfaces showed an antagonistic activity against M. fructicola. The possibility of the host peripheral defense by UV-C stimulation of the antagonist activity of a yeast is discussed.
Note:
Related Files :
Antagonistic yeast
biological control
Hormesis
Radiation
ultraviolet radiation
Show More
Related Content
More details
DOI :
10.1016/S0261-2194(98)80015-X
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21672
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:45
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Scientific Publication
The germicidal and hormetic effects of UV-C light on reducing brown rot disease and yeast microflora of peaches
17
Stevens, C., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Khan, V.A., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Lu, J.Y., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Wilson, C.L., USDA/ARS, Appalachian Fruit Research Station, Kearneysville, WV 25430, United States
Pusey, P.L., USDA/ARS, Fruit Tree Research, Laboratory, Wenatchee, WA 98801, United States
Kabwe, M.K., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Igwegbe, E.C.K., George Washington Carver Agric. E., Tuskegee University, Tuskegee, AL 36088, United States
Chalutz, E., ARO, Volcani Center, Bet Dagan, 50250, Israel
Droby, S., ARO, Volcani Center, Bet Dagan, 50250, Israel
The germicidal and hormetic effects of UV-C light on reducing brown rot disease and yeast microflora of peaches
The application of ultraviolet light-C doses (254 nm, UV-C) was used to determine the germicidal and hormetic effects on reducing brown rot of 'Elberta' peaches which were naturally and artificially inoculated with Monilinia fructicola. The results showed that a negative relationship existed between UV-C doses, colony forming units of the fungus, and the number of brown rot lesions. Also, the results of our study showed that the hormetic (beneficial) effect of low UV-C dose of 7.5 kJ m-2 induced host resistance by controlling latent brown rot infection. The hormetic effects of UV-C on peaches was photoreversed with visible light and resulted in the reduction of host resistance to brown rot. Furthermore, the results indicated that UV-C doses increased phenylalanine ammonia-lyase activity, delayed ripening and suppressed ethylene production. Additionally, the population of epiphytic yeast (Debaryomyces hansenii) increased curvilinearly on peach surfaces following UV-C irradiation up to 7.5 kJ m-2. Evaluation of the yeast population on the peach surfaces showed an antagonistic activity against M. fructicola. The possibility of the host peripheral defense by UV-C stimulation of the antagonist activity of a yeast is discussed.
Scientific Publication
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