Antifungal Activity of Leaf Essential Oil and Extracts of <Emphasis Type="Italic">Metasequoia glyptostroboides</Emphasis> Miki ex Hu |
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Authors: | Vivek K Bajpai Sun Chul Kang |
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Affiliation: | (1) Department of Biotechnology, College of Engineering, Daegu University, Kyoungsan, Kyoungbook, 712-714, Republic of Korea; |
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Abstract: | Plant diseases constitute an emerging threat to global food security. Many of the currently available antifungal agents for
agriculture are highly toxic and nonbiodegradable and cause extensive environmental pollution. Moreover, an increasing number
of phytopathogens are developing resistance to them. Therefore, the aim of this study was to assess the antifungal efficacy
of the leaf essential oil and the leaf extracts of Metasequoia glyptostroboides against Fusarium oxysporum, Fusarium solani, Phytophthora capsici, Colletotrichum capsici, Sclerotinia sclerotiorum, Botrytis cinerea and Rhizoctonia solani. The oil (1,000 μg/disc) and the extracts (1,500 μg/disc) revealed a remarkable antifungal effect against the tested plant
pathogenic fungi with a radial growth inhibition percentage of 41.3–66.3% and 13.4–54.4%, respectively along with their respective
MIC values ranging from 62.5 to 1,000 μg/ml and 500–4,000 μg/ml. The oil had a strong detrimental effect on spore germination
of all the tested plant pathogens along with the concentration as well as time-dependent kinetic inhibition of Botrytis cinerea. Also, the oil exhibited a potent in vivo antifungal effect against Phytophthora capsici on greenhouse grown pepper plants. The results of this study indicate that the oil and extracts of M. glyptostroboides leaves could become natural alternatives to synthetic fungicides to control certain important plant fungal diseases. |
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