נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Solar photo-inactivation of phytopathogens by trace level hydrogen peroxide and titanium dioxide photocatalysis
Year:
2005
Source of publication :
Phytoparasitica
Authors :
Bir, Lena
;
.
Feigelson, Leonid
;
.
Kirshner, Benny
;
.
Kritzman, Giora
;
.
Muszkat, Lea
;
.
Nir, Iris
;
.
Teitel, Meir
;
.
Volume :
33
Co-Authors:
Muszkat, L., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Feigelson, L., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Bir, L., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Muszkat, K.A., Dept. of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel
Teitel, M., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Dornay, I., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Kirchner, B., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Kritzman, G., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
267
To page:
274
(
Total pages:
8
)
Abstract:
Plant pathogenic bacteria in recirculated greenhouse water were inactivated by two distinct photochemical approaches: photo-inactivation in the presence of 0.005% to 0.01% hydrogen peroxide (H2O2), and photocatalytic inactivation with 0.01% titanium dioxide (TiO2). In both processes photo-inactivation is achieved by exposure to sunlight. Total inactivation, with 6-8 log units decrease in viable counts, was achieved in the study of the phytopathogens Erwinia carotovora (E.c.), Clavibacter michiganensis (C.m.) and Pseudomonas syringae pv. tomato (P.t.) by 10 to 30 min solar irradiation, in the presence of 0.15 to 0.3 mM (50-100 mg l-1) H 2O2. Different responses of the examined pathogens towards TiO2 photo-inactivation were noticed. Whereas 10 min of solar illumination in the presence of both 100 mg l-1 H2O 2 and 100 mg l-1 TiO2 resulted in total inactivation of P.t. and E.c., this treatment had no effect on C.m. However, with traces of H2O2 (e.g. 50-100 mg l-1), and in the absence of TiO2, C.m. was deactivated by 20 min of solar irradiation. P.t. was fully inactivated in the dark by H2O 2 at 3,000 mg l-1 (0.3%), but not with H2O 2 at ≤1000 mg l-1. Also, no inactivation occurred with solar illumination in the absence of H2O2. The mechanism of the bactericidal photoreaction and the special significance of plant pathogen inactivation by natural sunlight in the presence of trace levels of H 2O2 is discussed.
Note:
Related Files :
Clavibacter michiganensis
Erwinia
Pseudomonas syringae pv. tomato
Titanium dioxide (TiO2)
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28399
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:38
Scientific Publication
Solar photo-inactivation of phytopathogens by trace level hydrogen peroxide and titanium dioxide photocatalysis
33
Muszkat, L., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Feigelson, L., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Bir, L., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Muszkat, K.A., Dept. of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel
Teitel, M., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Dornay, I., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Kirchner, B., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Kritzman, G., Inst. of Plant Protection, ARO, Volcani Center, Bet Dagan 50250, Israel
Solar photo-inactivation of phytopathogens by trace level hydrogen peroxide and titanium dioxide photocatalysis
Plant pathogenic bacteria in recirculated greenhouse water were inactivated by two distinct photochemical approaches: photo-inactivation in the presence of 0.005% to 0.01% hydrogen peroxide (H2O2), and photocatalytic inactivation with 0.01% titanium dioxide (TiO2). In both processes photo-inactivation is achieved by exposure to sunlight. Total inactivation, with 6-8 log units decrease in viable counts, was achieved in the study of the phytopathogens Erwinia carotovora (E.c.), Clavibacter michiganensis (C.m.) and Pseudomonas syringae pv. tomato (P.t.) by 10 to 30 min solar irradiation, in the presence of 0.15 to 0.3 mM (50-100 mg l-1) H 2O2. Different responses of the examined pathogens towards TiO2 photo-inactivation were noticed. Whereas 10 min of solar illumination in the presence of both 100 mg l-1 H2O 2 and 100 mg l-1 TiO2 resulted in total inactivation of P.t. and E.c., this treatment had no effect on C.m. However, with traces of H2O2 (e.g. 50-100 mg l-1), and in the absence of TiO2, C.m. was deactivated by 20 min of solar irradiation. P.t. was fully inactivated in the dark by H2O 2 at 3,000 mg l-1 (0.3%), but not with H2O 2 at ≤1000 mg l-1. Also, no inactivation occurred with solar illumination in the absence of H2O2. The mechanism of the bactericidal photoreaction and the special significance of plant pathogen inactivation by natural sunlight in the presence of trace levels of H 2O2 is discussed.
Scientific Publication
You may also be interested in