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- Title
MUTUAL RELATIONS BETWEEN JASMONIC ACID AND ACIBENZOLAR-S-METHYL IN THE INDUCTION OF RESISTANCE TO FIRE BLIGHT IN APPLE TREES.
- Authors
Warabieda, W.; Markiewicz, M.; Wójcik, D.; Pulawska, J.
- Abstract
Analysis of the effects of jasmonic acid (JA) (at 1.5 mM and 2.5 mM) and acibenzolar-S-methyl (BTH) (at 0.5 mM and 1.5 mM), applied separately or together, on the development of fire blight in cv. Gala apple trees showed that almost all variants of elicitor treatment reduced fire blight symptoms compared to control. Disease severity in control plants was much higher in the nitrogen-fertilized than in the nitrogen-deficient plants, and the efficacy of the elicitors in disease control was also higher in the N-fertilized plants. The expression of selected PR apple genes (PR-1a, PR-2, PR-3) was induced more significantly by BTH than by JA. This study has disclosed the existence of mutual relations between JA and BTH in the induction of PR gene expression. These relations depended on nitrogen fertilization but, generally, JA was antagonistic to BTH more often than BTH to JA. However, this was not reflected in the severity of disease symptoms. Analysis of the costs of induced defence showed no effect of the application of the elicitors on shoot growth, fruit yield, or seed weight in apple trees in either fertilization variant.
- Subjects
JASMONIC acid; FIRE-blight; APPLE disease &; pest prevention; APPLE disease &; pest treatment; NITROGEN fertilizers; GENE expression; ELICITORS (Botany)
- Publication
Journal of Plant Pathology, 2015, Vol 97, Issue 1, p99
- ISSN
1125-4653
- Publication type
Article