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Issue: Vol. 630 No. 3: 20 Dec. 2023
Type: Article
Published: 2023-12-20
DOI: 10.11646/phytotaxa.630.3.4
Page range: 229-240
Abstract views: 74
PDF downloaded: 3

Serendipita officinale sp. nov. (Serendipitaceae): a new species of orchid mycorrhizal fungus

Institute of Biodiversity; School of Ecology and Environmental Science; Yunnan University; Kunming; Yunnan 650500; China
Institute of Biodiversity; School of Ecology and Environmental Science; Yunnan University; Kunming; Yunnan 650500; China
College of Landscape Architecture and Horticulture Sciences; Southwest Forestry University; Kunming; Yunnan 650224; China
Fungi Morphology Molecular phylogeny orchid mycorrhizal fungi Sebacinales Serendipitaceae Taxonomy

Abstract

Serendipita is a prominent fungal genus associated with orchids. In this study, a new species of orchid mycorrhizal fungus, Serendipita officinale, is described and thoroughly studied using morphological and molecular approaches. The fungus was isolated from naturally occurring protocorms of Dendrobium officinale in Chongqing Province, China. S. officinale has been observed to actively promote the germination of seeds and facilitate the seedling development of D. officinale, forming typical mycorrhizal pelotons within protocorm cells. This species is characterized by its characteristics on PDA medium, including the presence of abundant villiform and felty aerial mycelium, uninucleate hyphal cells, and the highest growth rate in terms of colony diameter (78 mm diam. in 2 weeks). Furthermore, analyses of ITS rDNA and LSU sequences also provide additional support for the novelty of this new plant symbiont.

 

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