文献类型：期刊文献

英文题名：Epidendrumradicans Fungal Community during Ex Situ Germination and Isolation of Germination-Enhancing Fungi

作者：Yao, Na[1] Wang, Tao[2] Cao, Xiaolu[1]

第一作者：姚娜

通信作者：Cao, XL[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry,Natl Forestry & Grassland Adm, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[2]China Natl Bot Garden, Beijing Floriculture Engn Technol Res Ctr, Beijing Lab Urban & Rural Ecol Environm, Beijing 100093, Peoples R China

年份：2022

卷号：10

期号：9

外文期刊名：MICROORGANISMS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000858763600001)】；

基金：This work was supported by National Non-profit Institute Research Fund of Chinese Academy of Forestry (CAFYBB2019ZA001) and National Natural Science Foundation of China (No. 31700547).

语种：英文

外文关键词：endophytes; mycorrhizae; orchidaceae; Ceratobasidium; high-throughput sequencing

摘要：Orchids exhibit varying specificities to fungi in different microbial environments. This pilot study investigated the preference of fungal recruitment during symbiotic germination of Epidendrum radicans Pav. ex Lindl. Two different orchid substrates were used for ex situ seed baiting: pine bark and rotten oak leaf, with Basidiomycota and Ascomycota as the respective dominant groups. Both substrates promoted seed germination, with a higher protocorm formation rate on pine bark (65.75%). High-throughput sequencing characterized the fungal communities of germinated protocorms. Basidiomycota was the dominant group in protocorms that symbiotically germinated on both substrates. The family-level community structures of endophytic fungi in protocorms that symbiotically germinated on both substrates were close to those of protocorms that germinated in vitro on MS1 medium. For protocorms, the dominant fungal groups recruited from substrates differed at the genus level; from pine bark, they were genera belonging to unclassified Sebacinales (41.34%), Thanatephorus (14.48%) and Fusarium (7.35%), while, from rotten oak leaf, they were Rhizoctonia (49.46%), Clitopilus (34.61%), and Oliveonia (7.96%). Four fungal isolates were successfully obtained and identified as belonging to the family Tulasnellaceae, genera Ceratobasidium and Peniophora, which could promote seed germination to the seedling stage. The data indicate that endophytic fungi for E. radicans germination on two different substrates are affected at the genus level by the substrate, with a degree of specificity at the family level.