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Dark septate endophyte : ウィキペディア英語版 | Dark septate endophyte Dark septate endophytes (DSE) are a group of endophytic fungi characterized by their morphology of melanized, septate, hyphae. This group is likely paraphyletic, and contain conidial as well as sterile fungi that colonize roots intracellularly or intercellularly.〔Jumpponen, A. 2001. Dark-Septate Endophytes – are they mycorrhizal? Mycorrhiza 11:207-211.〕〔Mandyam, K. and Jumpponen, A. 2005. Seeking the elusive function of the root-colonising dark septate endophytic fungi. Studies in Mycology. 53: 173-189.〕 Very little is known about the number of fungal taxa within this group, but all are in the Ascomycota. They are found in over 600 plant species and across 114 families of angiosperms and gymnosperms and co-occur with other types of mycorrhizal fungi.〔Jumpponen, A. and Trappe, J.M. 1998. Dark septate endophytes: a review of facultative biotrophic root-colonizing fungi. New Phytologist 140: 295-310.〕 They have a wide global distribution and can be more abundant in stressed environments.〔Mandyam, K. and Jumpponen, A. 2005. Seeking the elusive function of the root-colonising dark septate endophytic fungi. Studies in Mycology. 53: 173-189.〕 Much of their taxonomy, physiology, and ecology are unknown. ==Taxonomy== Based on analysis of sequences with the small subunit of the nuclear ribosomal RNA gene (18S), all DSE are within ascomycetes and include taxa in the orders Pleoporales, Microascales, Xylariales, Pezizales, Dothideales, Leotiales, Chaetothyriales, Elaphomycetales, Eurotiales, Onygenales, Saccharomycetales, Neolectales, Taphrinales, Mitosporic, and nonsporulating cultures.〔Jumpponen, A. and Trappe, J.M. 1998. Dark septate endophytes: a review of facultative biotrophic root-colonizing fungi. New Phytologist 140: 295-310.〕
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