Identification of Armillaria nabsnona in gastrodia tubers.
The symbiosis between Armillaria species and an achlorophylous orchid Gastrodia elata BLUME has been reported. The main species described as a symbiont is Armillaria mellea (VAHL: FR.) KUMMER, known widely as a primary root rot pathogen. Samples collected from the rhizomorphs attached to the tuber of G. elata were separated and analyzed. Molecular analysis based on sequencing of the intergenic spacer 1 (IGS-1) and internal transcribed spacer (ITS) regions of the ribosomal DNA (rDNA) was performed, coupled with restriction fragment length polymorphism (RFLP) of the IGS-1 region. Cultural morphology and features of basidiomata were also used to characterize the isolates. Phylogenetic analysis and morphological data strongly suggested that the fungus present in the tubers of G. elata is Armillaria nabsnona. This is the first report of occurrence of this Armillaria species in association with G. elata.
Sekizaki
Haruo
H
Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Hokkaido, Japan. sekizaki@hoku-iryo-u.ac.jp
Kuninaga
Shiro
S
Yamamoto
Mizuho
M
Asazu
Sandra Naomi
SN
Sawa
Satoko
S
Kojoma
Mareshige
M
Yokosawa
Ryozo
R
Yoshida
Naotoshi
N
D001487:Basidiomycota / Q000737:chemistry* / Q000235:genetics*; D021901:DNA, Intergenic / Q000235:genetics; D018744:DNA, Plant / Q000235:genetics; D004720:Endonucleases / Q000737:chemistry / Q000235:genetics; D031668:Gastrodia / Q000737:chemistry* / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D018517:Plant Roots / Q000737:chemistry; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013172:Spores, Fungal / Q000235:genetics
D021901:DNA, Intergenic; D018744:DNA, Plant; D004720:Endonucleases