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פותח על ידי קלירמאש פתרונות בע"מ -
Climate change effect on plant–pathogen–beneficial microorganisms interaction in high humidity-promoted tomato diseases
Year:
2012
Source of publication :
IOBC/WPRS Bulletin
Authors :
אלעד, יגאל
;
.
בורנשטיין, מנחם
;
.
בן כליפה, חננאל
;
.
רב דוד, דליה
;
.
שולחני, רן
;
.
Volume :
78
Co-Authors:
Facilitators :
From page:
15
To page:
18
(
Total pages:
4
)
Abstract:

Climate change refers to changes in the means and/or variabilities of climate parameters. Plant pathogens have a range of environmental conditions which allows them to survive and cause disease. Environmental changes might cause alterations in distribution, survival and plant-pathogen interactions; these changes can increase or decrease epidemical events. The suppressive effect of beneficial organisms may also be affected by environmental conditions. Two humidity promoted polycyclic diseases were studied: i. late blight (Phytophthora infestans) – a fast developing and destructive disease in tomato and potato plants. A critical factor
for disease epidemic occurrence is 6-8 hours of wetness which allows penetration into the plant tissue; ii. grey mould (Botrytis cinerea) – infects many crops including tomato and proliferates at high humidity, few hours of wetness are a prerequisite for infection. Tomato plants inoculated with P. infestans with wetness duration of 4, 6, 8, 12 and 24 hours showed decrease in disease frequency and severity under 8 and 12h wetness as compared with 24h. B. cinerea infection severity was different between 4 and 10h wetness duration. Spraying the plants with two yeast, three bacterium isolates and Trichoderma followed inoculation with P. infestans under wetness durations of 8 and 24h, revealed an effect of wetness duration on biocontrol activity; 24h wetness duration less disease control was observed. When treating with the microorganisma at pre- and
post-inoculation, the same disease suppression was obtained for 8 and 24h wetting periods. Two of the BCAs decrease sporangia formation. No interaction in grey mould supression was observed between biocontrol agents and wetness duration. It seems that environmental conditions which decrease late blight intensity allow better activity of the introduced biocontrol agents.
Climate change is expected to affect rain quantity and frequency and as a result the duration of wetness may be affected. This in turn, in some cases as demonstrated in the present work, may affect the ability of beneficial organisms to suppress diseases.

Note:
Related Files :
climate change
plant-pathogen interaction
plant diseases and disorders
plant protection
tomato
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
37488
Last updated date:
02/03/2022 17:27
Creation date:
08/10/2018 15:40
You may also be interested in
Scientific Publication
Climate change effect on plant–pathogen–beneficial microorganisms interaction in high humidity-promoted tomato diseases
78

Climate change refers to changes in the means and/or variabilities of climate parameters. Plant pathogens have a range of environmental conditions which allows them to survive and cause disease. Environmental changes might cause alterations in distribution, survival and plant-pathogen interactions; these changes can increase or decrease epidemical events. The suppressive effect of beneficial organisms may also be affected by environmental conditions. Two humidity promoted polycyclic diseases were studied: i. late blight (Phytophthora infestans) – a fast developing and destructive disease in tomato and potato plants. A critical factor
for disease epidemic occurrence is 6-8 hours of wetness which allows penetration into the plant tissue; ii. grey mould (Botrytis cinerea) – infects many crops including tomato and proliferates at high humidity, few hours of wetness are a prerequisite for infection. Tomato plants inoculated with P. infestans with wetness duration of 4, 6, 8, 12 and 24 hours showed decrease in disease frequency and severity under 8 and 12h wetness as compared with 24h. B. cinerea infection severity was different between 4 and 10h wetness duration. Spraying the plants with two yeast, three bacterium isolates and Trichoderma followed inoculation with P. infestans under wetness durations of 8 and 24h, revealed an effect of wetness duration on biocontrol activity; 24h wetness duration less disease control was observed. When treating with the microorganisma at pre- and
post-inoculation, the same disease suppression was obtained for 8 and 24h wetting periods. Two of the BCAs decrease sporangia formation. No interaction in grey mould supression was observed between biocontrol agents and wetness duration. It seems that environmental conditions which decrease late blight intensity allow better activity of the introduced biocontrol agents.
Climate change is expected to affect rain quantity and frequency and as a result the duration of wetness may be affected. This in turn, in some cases as demonstrated in the present work, may affect the ability of beneficial organisms to suppress diseases.

Scientific Publication
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