Keywords :
Chemotaxonomy,
Conoideocrella,
Hopanoids,
Torrubiella,
Zeorin
บทคัดย่อ :
The insect pathogens in the genus Torrubiella s. lat. were recently divided into new genera
based on molecular phylogenetic characters. Isolates collected at various locations in Thailand,
were tested for their productivity of a hopane-type triterpene, zeorin (6a,22-dihydroxyhopane),
when cultured in potato dextrose broth under static conditions. Among the 49
strains of Torrubiella s. lat. species, Conoideocrella luteorostrata (ten strains) and C. tenuis
(seven strains), all collected on scale insects (Hemiptera), produced zeorin, whereas another
six strains of Orbiocrella petchii (which was recently removed from Torrubiella) failed in the
detection of this secondary metabolite. All other Torrubiella s. lat. (26 strains), collected on
other insect hosts including leafhoppers (eight strains), Lepidoptera (one strain), and spiders
(17 strains), produced no detectable zeorin. Paecilomyces cinnamomeus (nine strains), the
anamorph of C. luteorostrata, also produced zeorin. These results correspond with the recent
taxonomic reclassification based on multigene phylogeny.
เอกสารอ้างอิง :
Isaka, M., Sappan, M., Luangsa-Ard, J. J., Hywel-Jones, N. L., Mongkolsamrit, S., & Chunhametha, S. (2011). Chemical taxonomy of Torrubiella s. lat.: zeorin as a marker of Conoideocrella. Fungal biology, 115(4-5), 401-405.
