Abstract
In this study a new record of Ganodermatropicum is described as from Chiang Rai Province, Thailand. The fruiting body was collected on the base of a living Dipterocarpus tree. The sample is described on the basis of morphological characteristics and phylogenetic analyses, and compared with closely related taxa. Multigene phylogenetic analyses of LSU, ITS, and RPB2 highly support the placement of the G.tropicum group with isolates from China and Taiwan (Maximum likelihood 100%, Maximum parsimony 100%, and Bayesian posterior probabilities 1.00). The optimal media, pH, and temperature for mycelial growth of the G.tropicum strain KUMCC18-0046 was also investigated and is reported as: PDA, MEA, and YPD, at pH 7–8 and 25–28 °C, respectively. This is the first report on the successful growing conditions for mycelial production, but unfortunately fruiting could not be achieved.
Highlights
In an attempt to further our knowledge of the taxonomy this genus, we describe a specimen of Ganoderma tropicum as a new record for Thailand based on morphological characteristics and phylogenetic analyses, and the optimal conditions for mycelial growth of G. tropicum are reported
The tree topologies were grouped into nine distinct clades, including five laccate clades of G. tropicum, G. sichuanense, G. lingzhi, G. orbiforme, G. lucidum, and two other laccate clades with one non-laccate clade, and an outgroup clade
The phylogenetic analyses showed considerably high support for the G. tropicum strain KUMCC18-0046 being closely related to the laccate G. tropicum isolates of China and Taiwan (MLBS = 100%/ MPBS = 100%/ posterior probabilities (PP) = 1.00)
Summary
Ganoderma is more frequently distributed in tropical and temperate regions worldwide (Cao and Yuan 2013), and the distribution of G. tropicum is limited to the tropics (Cao et al 2012). Ganoderma is characterized by distinctive laccate or non-laccate, sessile to stipitate basidiomata, double-walled basidiospores, and interwall pillars (Karsten 1881; Moncalvo and Ryvarden 1997). Polyporus lucidus (Curtis) Fr. is the original type species of the genus (Moncalvo and Ryvarden 1997). There are 449 records in the Index Fungorum (http://www.indexfungorum.org/; accessed date: 25 January 2019) and 384 records of taxa in MycoBank There are 449 records in the Index Fungorum (http://www.indexfungorum.org/; accessed date: 25 January 2019) and 384 records of taxa in MycoBank (http://www. mycobank.org/; accessed date: 25 January 2019)
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