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פותח על ידי קלירמאש פתרונות בע"מ -
A foliar spray of micronutrient solutions induces local and systemic protection against powdery mildew (Sphaerotheca fuliginia) in cucumber plants
Year:
1997
Authors :
ראובני, ראובן
;
.
Volume :
103
Co-Authors:
Reuveni, M., Golan Research Institute, Univ. of Haifa, P.O.Box 97, Qasrine 12900, Israel
Agapov, V., Golan Research Institute, Univ. of Haifa, P.O.Box 97, Qasrine 12900, Israel
Reuveni, R., Dept. of Plant Pathology, ARO, Newe ya'Ar Research Center, P.O. Box 1021, Ramatyishay 30095, Israel
Facilitators :
From page:
581
To page:
588
(
Total pages:
8
)
Abstract:
single spray of solutions of 0.005M H3 BO3, 0.0025M CuSO4, and 0.0025 MnCl2, on the upper surface of the first true leaf of cucumber plants 2 h before inoculation with a conidial suspension of Sphaerotheca fuliginea, induced systemic protection against powder mildew in leaves 2 and 3 without causing any damage on the induced leaf (first leaf). A similar level of systemic protection was observed when plants were induced by micronutrients, 2, 24 and 72 h before challenge with S. fuliginea. The level of protection induced by various concentrations varied from solution to solution. In general, the systemic protection induced by K2HPO4 was similar to that by the microelements. Spraying of a 1:1 mixture of phosphate and micronutrient solutions did not improve the systemic protection over that obtained with each of the solutions alone. Increasing the inoculum concentration of S. fuliginea increased the number of powdery mildew colonies produced on both induced and non-induced plants and has relatively affected the systemic protection on induced plants. A single foliar spray of micronutrient solutions, as a prophylactic treatment, on the upper surface of all the leaves of 3-leaf stage cucumber plants significantly inhibited powdery mildew development. A single spray of MnCl2 on leaf 1 elevated peroxidase activity in the soluble fraction and caused an enhancement of β-1,3-glucanase content in the ionically bound fractions of leaf 2 of non-inoculated plants. Forty-eight hours after inoculation, the level of both fractions of the enzymes increased in non-treated plants and decreased (β-1,3-glucanase) or remained unchanged (peroxidase) in treated (induced) plants as compared to non-treated plants. The possible mechanism for this protection, and the use of microelements and phosphate solutions as inducers for systemic protection and as agents for disease control are discussed.
Note:
Related Files :
Cucumis sativus
Erysiphales
Induced resistance
Podosphaera fuliginea
Sphaerotheca fuliginia
עוד תגיות
תוכן קשור
More details
DOI :
10.1023/A:1008671630687
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21747
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:46
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Scientific Publication
A foliar spray of micronutrient solutions induces local and systemic protection against powdery mildew (Sphaerotheca fuliginia) in cucumber plants
103
Reuveni, M., Golan Research Institute, Univ. of Haifa, P.O.Box 97, Qasrine 12900, Israel
Agapov, V., Golan Research Institute, Univ. of Haifa, P.O.Box 97, Qasrine 12900, Israel
Reuveni, R., Dept. of Plant Pathology, ARO, Newe ya'Ar Research Center, P.O. Box 1021, Ramatyishay 30095, Israel
A foliar spray of micronutrient solutions induces local and systemic protection against powdery mildew (Sphaerotheca fuliginia) in cucumber plants
single spray of solutions of 0.005M H3 BO3, 0.0025M CuSO4, and 0.0025 MnCl2, on the upper surface of the first true leaf of cucumber plants 2 h before inoculation with a conidial suspension of Sphaerotheca fuliginea, induced systemic protection against powder mildew in leaves 2 and 3 without causing any damage on the induced leaf (first leaf). A similar level of systemic protection was observed when plants were induced by micronutrients, 2, 24 and 72 h before challenge with S. fuliginea. The level of protection induced by various concentrations varied from solution to solution. In general, the systemic protection induced by K2HPO4 was similar to that by the microelements. Spraying of a 1:1 mixture of phosphate and micronutrient solutions did not improve the systemic protection over that obtained with each of the solutions alone. Increasing the inoculum concentration of S. fuliginea increased the number of powdery mildew colonies produced on both induced and non-induced plants and has relatively affected the systemic protection on induced plants. A single foliar spray of micronutrient solutions, as a prophylactic treatment, on the upper surface of all the leaves of 3-leaf stage cucumber plants significantly inhibited powdery mildew development. A single spray of MnCl2 on leaf 1 elevated peroxidase activity in the soluble fraction and caused an enhancement of β-1,3-glucanase content in the ionically bound fractions of leaf 2 of non-inoculated plants. Forty-eight hours after inoculation, the level of both fractions of the enzymes increased in non-treated plants and decreased (β-1,3-glucanase) or remained unchanged (peroxidase) in treated (induced) plants as compared to non-treated plants. The possible mechanism for this protection, and the use of microelements and phosphate solutions as inducers for systemic protection and as agents for disease control are discussed.
Scientific Publication
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