Table 2.
List of fungal operational taxonomic units (OTUs)a identified in orchid roots using sequencing.
| OTU | Length (bp) [n = frequency of occurrence] | Phylogenetic relationshipb | |||
|---|---|---|---|---|---|
| Taxonomic affiliation | Closest match in GenBank (accession number) | Sequence identity (%) | Associated orchid species | ||
| OTU100 | 243 [n = 1] | Ceratobasidiaceae | Ceratobasidium cereale (KT362077) | 97 | Cb† |
| OTU159 | 336 [n = 1] | Ceratobasidiaceae | Rhizoctonia solani (KM488565) | 96 | Cr‡ |
| OTU183 | 302 [n = 1] | Ceratobasidiaceae | Ceratobasidium theobromae (KU319573) | 88 | Cr‡ |
| OTU438 | 251 [n = 1] | Ceratobasidiaceae | Rhizoctonia solani (JQ676901) | 100 | Pc‡ |
| OTU548 | 291 [n = 3] | Serendipitaceae | Sebacinales sp. 44 (HQ853682) | 95 | Cr‡ |
| OTU549 | 303 [n = 1] | Serendipitaceae | Sebacinales sp. 4035 (JF906112) | 89 | Dl‡ |
| OTU550 | 314 [n = 5] | Serendipitaceae | Sebacina [ = Serendipita] sp. Seb25I (AB831811) | 90 | Bm‡; Cb†; Cf†, Da‡ |
| OTU560 | 303 [n = 1] | Serendipitaceae | Sebacina [ = Serendipita] sp. (KX185541) | 91 | Dl‡ |
| OTU561 | 305 [n = 2] | Serendipitaceae | Sebacina [ = Serendipita] sp. (KC928372) | 90 | Dl‡ |
| OTU574 | 527 [n = 1] | Tulasnellaceae | Epulorhiza sp. M-1 (JQ713573) | 85 | Dl‡ |
| OTU575 | 527 [n = 4] | Tulasnellaceae | Tulasnella sp. DC225 (KC152330) | 90 | Dl‡ |
| OTU576 | 527 [n = 3] | Tulasnellaceae | Tulasnella sp. DC225 (KC152326) | 91 | Dl‡ |
| OTU579 | 527 [n = 2] | Tulasnellaceae | Tulasnella sp. DC225 (KC152330) | 92 | Cm‡; Dl‡ |
| OTU582 | 527 [n = 1] | Tulasnellaceae | Tulasnella sp. DC225 (KC152330) | 87 | Dl‡ |
| OTU585 | 540 [n = 1] | Tulasnellaceae | Tulasnella sp. DC225 (KC152324) | 90 | Dl‡ |
| OTU589 | 471 [n = 1] | Tulasnellaceae | Tulasnella sp. DC225 (KC152333) | 91 | Dl‡ |
| OTU591 | 527 [n = 1] | Tulasnellaceae | Tulasnellaceae sp. 7 MB-2012 (JX138563) | 97 | Dl‡ |
aOTUs were defined by 97% internal transcribed spacer (ITS) sequence similarity; bBased on BLAST analysis (October 2017); Bm: Bulbophyllum medusae (Lindl.) Rchb. f., Cb: Cymbidium bicolor ssp. Lindl. ssp. pubescens (Lindl.) Du Pay & Cribb, Cf: Cymbidium finlaysonianum Lindl., Cm: Coelogyne mayeriana Rchb. f., Cr: Coelogyne rochussenii de Vr., Da: Dendrobium aloifoliuim (Blume) Rchb. f., Dl: Dendrobium leonis (Lindl.) Rchb. f., Pc: Phalaenopsis cornu-cervi (Breda) Blume & Rchb. f.; statuses of orchid species: †nationally Critically Endangered or ‡Presumed Nationally Extinct.