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- W4313292216 abstract "Abstract Background In order to explore the community composition and diversity of the endophytic fungi in Taxillus chinensis , samples of the parasites growing on seven different hosts, Morus alba , Prunus salicina , Phellodendron chinense , Bauhinia purpurea , Dalbergia odorifera , Diospyros kaki and Dimocarpus longan , were isolated. The strains were identified by their morphological characteristics and their internal transcribed spacer (ITS) sequences were analyzed. Results 150 different endophytic fungi were isolated from the haustorial roots of the seven hosts, and the total isolation rate was 61.24%. These were found to belong to 1 phylum, 2 classes, 7 orders, 9 families, 11 genera and 8 species. Pestalotiopsis , Neopestalotiopsis and Diaporthe were the dominant genera, accounting for 26.67, 17.33 and 31.33% of the total number of strains, respectively. Diversity and similarity analyses showed that the endophytic fungi isolated from D. longan (H'=1.60) had the highest diversity index. The highest richness indexes were found in M. alba and D. odorifera (both 2.23). The evenness index of D. longan was the highest (0.82). The similarity coefficient of D. odorifera was the most similar to D. longan and M. alba (33.33%), while the similarity coefficient of P. chinense was the lowest (7.69%) with M. alba and D. odorifera . Nine strains showed antimicrobial activities. Among them, Pestalotiopsis sp., N. parvum and H. investiens showed significant antifungal activity against three fungal phytopathogens of medicinal plants. At the same time, the crude extracts from the metabolites of the three endophytic fungi had strong inhibitory effect on the three pathogens. Pestalotiopsis sp., N. parvum and H. investiens had the strongest inhibitory effects of S. cucurbitacearum , with inhibitory rates of 100%, 100% and 81.51%, respectively. Secondly, N. parvum had a strong inhibitory effect on D. glomerata and C. cassicola , with inhibitory rates of 82.35% and 72.80%, respectively. Conclusions These results indicate that the species composition and diversity of endophytic fungi in the branches of T. chinensis were varied in the different hosts and showed good antimicrobial potential in the control of plant pathogens." @default.
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- W4313292216 date "2022-12-29" @default.
- W4313292216 modified "2023-09-25" @default.
- W4313292216 title "Differences and biocontrol potential of haustorial endophytic fungi from Taxillus Chinensis on different host plants" @default.
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- W4313292216 doi "https://doi.org/10.21203/rs.3.rs-2324449/v1" @default.
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