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פותח על ידי קלירמאש פתרונות בע"מ -
Oospore formation by Phytophthora infestans in potato tubers
Year:
2001
Source of publication :
Phytopathology
Authors :
לוין, עמוס
;
.
Volume :
91
Co-Authors:
Levin, A., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Baider, A., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Rubin, E., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Gisi, U., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Cohen, Y., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Facilitators :
From page:
579
To page:
585
(
Total pages:
7
)
Abstract:
The ability of Phytophthora infestans, the causal agent of potato and tomato late blight, to produce oospores in potato tuber tissue was studied in the field and under laboratory conditions. In 1998 and 2000 field experiments, the canopy of potato cvs. Alpha and Mondial, respectively, were coinoculated with A1 + A2 sporangia of the fungus, and the infected tubers collected at harvest were examined for the presence of oospores. In 1998, only 2 of 90 infected tubers had oospores, whereas none of the 90 tubers examined in 2000 had any oospores. In the latter experiment, infected tubers kept in storage up to 12 weeks after harvest had no oospores. Artificial co-inoculations of whole tubers with A1 + A2 sporangia resulted only rarely in the formation of oospores inside the tubers. Co-inoculations of potato tuber discs taken from dormant tubers 0 to 16 weeks after harvest failed to support any oospore production, whereas discs taken from sprouting tubers of ≥18 weeks after harvest allowed oospores to form. Tuber discs showed enhanced oospore formation when treated before inoculation with either sugars, amino acids, casein hydrolysate, β-sitosterol, or chloroethylphosphonic acid. In contrast, reducing airflow into the petri dishes where potato tuber discs were incubated reduced the number of oospores produced. The number of oospores produced in tuber tissue was lower compared with that in leaf tissue regardless of the origin of isolates used. The data show that the ability of Phytophthora infestans to produce oospores in potato tuber tissue is very limited and increases with tuber aging.
Note:
Related Files :
casein hydrolysate
epidemiology
Inoculation
late blight
oospore
Plant Disease
Potato tuber
sitosterol
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26368
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:22
You may also be interested in
Scientific Publication
Oospore formation by Phytophthora infestans in potato tubers
91
Levin, A., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Baider, A., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Rubin, E., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Gisi, U., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Cohen, Y., Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel
Oospore formation by Phytophthora infestans in potato tubers
The ability of Phytophthora infestans, the causal agent of potato and tomato late blight, to produce oospores in potato tuber tissue was studied in the field and under laboratory conditions. In 1998 and 2000 field experiments, the canopy of potato cvs. Alpha and Mondial, respectively, were coinoculated with A1 + A2 sporangia of the fungus, and the infected tubers collected at harvest were examined for the presence of oospores. In 1998, only 2 of 90 infected tubers had oospores, whereas none of the 90 tubers examined in 2000 had any oospores. In the latter experiment, infected tubers kept in storage up to 12 weeks after harvest had no oospores. Artificial co-inoculations of whole tubers with A1 + A2 sporangia resulted only rarely in the formation of oospores inside the tubers. Co-inoculations of potato tuber discs taken from dormant tubers 0 to 16 weeks after harvest failed to support any oospore production, whereas discs taken from sprouting tubers of ≥18 weeks after harvest allowed oospores to form. Tuber discs showed enhanced oospore formation when treated before inoculation with either sugars, amino acids, casein hydrolysate, β-sitosterol, or chloroethylphosphonic acid. In contrast, reducing airflow into the petri dishes where potato tuber discs were incubated reduced the number of oospores produced. The number of oospores produced in tuber tissue was lower compared with that in leaf tissue regardless of the origin of isolates used. The data show that the ability of Phytophthora infestans to produce oospores in potato tuber tissue is very limited and increases with tuber aging.
Scientific Publication
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