Evaluating the Antagonistic Potential of Bacteria on Sclerotinia Slerotiorum, Causal Agent of White Mould of Carrots
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Disease suppressive composts are known to contain beneficial bacteria that can be antagonistic to plant pathogens. This research evaluated whether Sclerotinia sclerotiorum — commonly known as white mould disease — can be managed using antagonistic bacteria from forestry compost. In vitro and in vivo experiments demonstrated that bacteria from the Pseudomonas and Bacillus genera can inhibit mycelial growth and reduce white mould disease. Extraction of culture filtrates and isolation procedures were performed to identify potential bioactive compounds. Three cyclodipeptides were purified and characterized from culture filtrates of Pseudomonas arsenicoxydans (F9-7). The three cyclodipeptide were L-Val-L-Pro, L-Leu-L-Pro, and L-Phe-L-Pro and they are though to be bioactive compounds responsible for the antagonistic against S. sclerotiorum. The most antagonistic effect was obtained with the cyclodipeptide L-Leu-L-Pro at a concentration of 100 mg/mL. These results indicated a potential for some bacteria to reduce the growth of the fungus and its associated disease on carrots.
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Copyright © 2022 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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- 2022
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meyer-evaluatingtheantagonisticpotentialofbacteria.pdf | 2023-05-05 | Public | Download |