Detection of fungi producing infection-inhibiting metabolites against <Emphasis Type="Italic">Alternaria alternata</Emphasis> Japanese pear pathotype from fungi inhabiting internal tissues of Japanese pear shoots |
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Authors: | Evelyn Aigho?Aremu Koichi?Tanaka Yasunori?Akagi Nitaro?Maekawa Hajime?Akamatsu Motoichiro?Kodama Email author" target="_blank">Hiroshi?OtaniEmail author |
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Institution: | (1) The United Graduate School of Agricultural Sciences, Tottori University, Tottori, Japan;(2) Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan;(3) The Tottori Mycological Institute, Tottori, Japan |
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Abstract: | Fungi inhabiting Japanese pear were isolated from internal tissues of cv. Nijisseiki, and culture filtrates (CFs) of 100 isolates were evaluated for their inhibitory activity against infection by Alternaria alternata Japanese pear pathotype. CFs of 11 isolates inhibited lesion formation on the pear by the pathogen. Among these isolates, CFs of five isolates inhibited spore germination. CFs of the six other isolates inhibited appressorial formation, infection hypha formation, AK-toxin production, or a combination of these actions. Analysis of sequence homology in the rDNA ITS1 regions of these isolates showed that most isolates had high homology with some fungal endophytes. |
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Keywords: | Alternaria alternata Japanese pear pathotype Japanese pear Culture filtrates Infection-inhibiting metabolites rDNA ITS1 regions Endophytes |
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