Characterization and Investigation of Antifungal Activity of Endophytic Bacteria Isolated from Lavender (Lavandula angustifolia) Plant
İnci GÜLER GÜNEY | Mehmet Ata KESKE
In this study, 65 endophytic bacteria were isolated from lavender plants. The morphological, physiological, and biochemical properties and enzyme activities of endophytic bacteria were investigated. In the test of tolerance of isolates to different temperature degrees, isolate LA6 was positive at 4°C, and all other isolates were negative. From the 41°C isolates, isolates LA42 and LA46 were negative, and all other isolates were positive. From endophytic bacteria, isolates LA1, LA5, LA6, LA7, LA8, LA11, LA12, LA13, LA25, LA28, LA41, LA45, LA48, LA50, LA53, and LA61 gave positive results in their tolerances at 10% NaCl concentration. In the carbohydrate test, isolates gave positive results between 71% and 91%. All isolates gave positive results in the phosphatase activity and protease activity of endophytic bacteria. Among other enzyme activities, 86% of the isolates gave positive results in cellulase activity, ACC deaminase activity, and nitrate reduction. 75% of the isolates gave positive results in siderophore production, and effective results were obtained. The % inhibition rates of endophytic isolates against pathogens varied between 3.7% and 78% against Neoscytalidium dimidiatum, between 8% and 80% against Fusarium culmorum, and between 36.1% and 61.8% against Fusarium oxysporum. As a result of this study, promising results are seen in the potential use of endophytic bacteria isolated from lavender as biofertilizer.
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