Bioresources Technology Unit BTU

Khlong Luang, Thailand

Bioresources Technology Unit BTU

Khlong Luang, Thailand
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Boonyuen N.,Bioresources Technology Unit BTU | Boonyuen N.,Kasetsart University | Sri-indrasutdhi V.,Bioresources Technology Unit BTU | Suetrong S.,Bioresources Technology Unit BTU | And 2 more authors.
Mycologia | Year: 2012

As part of a long term study of fungi colonizing submerged wood in freshwater streams a new Annulatascus species, A. aquatorba, is described and illustrated from Erythrophleum teysmannii test blocks from Sirindhorn Peat Swamp Forest, southern Thailand. It differs from other species in the genus in ascospore measurements, thickness of the cell wall, 1- 3-septate, fusoid to lunate shape, with central brown cells and subhyaline end cells and without a mucilaginous sheath. Asci are cylindrical, pedicellate, with a distinct, wedge-shaped and non-amyloid apical ring. Phylogenetic relationships of this species, based on the combined partial 18S and 28S rDNA, place it in the same clade as A. velatisporus (type species), A. hongkongensis and A. nilensis. © 2012 by The Mycological Society of America.

Boonyuen N.,Bioresources Technology Unit BTU | Boonyuen N.,Kasetsart University | Chuaseeharonnachai C.,Bioresources Technology Unit BTU | Suetrong S.,Bioresources Technology Unit BTU | And 4 more authors.
Mycologia | Year: 2011

The taxonomic placement of freshwater and marine Savoryella species has been widely debated, and the genus has been tentatively assigned to various orders in the Sordariomycetes. The genus is characterized as possessing paraphyses that deliquesce early, elongate, clavate to cylindrical asci with a poorly developed apical ring and versicolored, three-septate ascospores. We performed two combined phylogenetic analyses of different genes: (i) partial small subunit rRNA (SSU), large subunit rRNA (LSU), DNA-dependent RNA polymerase II largest subunit (rpb2) dataset and (ii) SSU rDNA, LSU rDNA, DNA-dependent RNA polymerase II largest subunit (rpb1 and rpb2), translation elongation factor 1-alpha (tef1), the 5.8S ribosomal DNA (5.8S rDNA) dataset. Our results indicate that Savoryella species formed a monophyletic group within the Sordariomycetes but showed no affinity to the Hypocreales, Halosphaeriales (now Microascales), Sordariales and Xylariales, despite earlier assignments to these orders. Savoryella, Ascotaiwania and Ascothailandia (and its anamorph, Canalisporium) formed a new lineage that has invaded both marine and freshwater habitats, indicating that these genera share a common ancestor and are closely related. Because they show no clear relationship with any named order we erect a new order Savoryellales in the subclass Hypocreomycetidae, Sordariomycetes. The genera Savoryella and Ascothailandia are monophyletic, while the position of Ascotaiwania is unresolved. All three genera are phylogenetically related and form a distinct clade similar to the unclassified group of marine ascomycetes comprising the genera Swampomyces, Torpedospora and Juncigera (TBM clade: Torpedospora/Bertia/ Melanospora) in the Hypocreomycetidae incertae sedis. © 2011 by The Mycological Society of America.

Nugraha A.S.,University of Wollongong | Nugraha A.S.,University of Jember | Haritakun R.,Bioresources Technology Unit BTU | Keller P.A.,University of Wollongong
Natural Product Communications | Year: 2013

The rhizome of Drynaria rigidula has been traditionally claimed to have anti-infective properties. A phytochemical study conducted on the rhizome successfully isolated two new aromatic glycosides as well as three known terpenoids, two benzoic acid derivatives and two known flavonoid glycosides. The rhizome methanol extract and its fractions were tested against Mycobacterium tuberculosis, Plasmodium falciparum, herpes simplex virus and KB-oral cancer cell; insignificant activity was found.

Suetrong S.,Bioresources Technology Unit BTU | Suetrong S.,Mae Fah Luang University | Suetrong S.,King Saud University | Hyde K.D.,Bioresources Technology Unit BTU | And 11 more authors.
Cryptogamie, Mycologie | Year: 2011

Trematosphaeriaceae fam. nov. is introduced to accommodate the genera Falciformispora, Halomassarina and Trematosphaeria. The main distinguishing characters of the family are medium-sized rounded ascomata with a papillate ostiole, a relatively wide, coriaceous peridium, cellular pseudoparaphyses and cylindro-clavate asci. The ascospores are two-celled or many celled, hyaline or brown. Phylogenetic analysis inferred from combined nuclear SSU and LSU rRNA and translation elongation factor 1-alpha (TEF-1-alpha) and second largest subunit of RNA polymerase (RPB2) datasets show that these genera form a strongly supported cluster within the Pleosporales. The type species of each genus is illustrated and briefly discussed. Asteromassaria pulchra has been included in the family in previous publications; however, since the type of the genus (A. macrospora) was not included in the phylogenetic analysis, the familial placement cannot be confirmed. Furthermore Asteromassaria pulchra did not cluster in Trematosphaeriaceae in the analysis presented in this paper. © 2011 Adac. Tous droits réservés.

Pang K.-L.,National Taiwan Ocean University | Hyde K.D.,Mae Fah Luang University | Alias S.A.,University of Malaya | Suetrong S.,Bioresources Technology Unit BTU | And 3 more authors.
Cryptogamie, Mycologie | Year: 2013

Abstract A new mangrove fungus collected in Tioman Island, Malaysia, is morphologically similar to marine species of Saccardoella. It also phylogenetically groups with Saccardoella rhizophorae in the Dothideomycetes, based on combined analysis of partial SSU, LSU rRNA and TEF1 gene sequences. The new fungus and S. rhizophorae form a well-supported clade with Acrospermum spp. in the Acrospermaceae. Both species therefore do not belong in Saccardoella, a genus with unitunicate asci. A new genus, Dyfrolomyces, is established to accommodate the new fungus (Dyfrolomyces tiomanensis) while the three marine Saccardoella species (S. mangrovei, S. marinospora, S. rhizophorae) are transferred to the new genus. Dyfrolomyces is characterized by forming a clypeus on substrates, with immersed perithecial ascomata, bitunicate/fissitunicate asci and multi-septate ascospores with/without a sheath. Since D. rhizophorae and D. tiomanensis do not cluster with any known families in the Dothideomycetes, a new family, Dyfrolomycetaceae, is introduced to accommodate the Dyfrolomyces species. © 2013 Adac. Tous droits réservés.

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