Culture studies and secondary compounds of six Ramalina species

Mycological Research
Lucimara M CordeiroElfie Stocker-Wörgötter

Abstract

Mycobiont isolation experiments were performed on six species of Ramalina from Brazil: R. celastri, R. complanata, R. dendriscoides, R. gracilis, R. peruviana and R. sprengelii. This study aimed to optimize the culture conditions and nutrient requirements of the selected mycobionts. The aposymbiotic R. complanta was successfully isolated from ascospores, while aposymbiotic R. peruviana was obtained from thallus fragments. In R. peruviana the production of secondary metabolites was investigated under aposymbiotical growth conditions using HPLC. When cultivated on solid medium, this mycobiont produced the typical chemosyndrome (sekikaic acid and satellite compounds), found in the voucher lichen thallus. When cultivated in liquid medium (immersed in malt yeast medium in the absence of agar), only one, the major lichen substance, sekikaic acid, was synthesized by the fungus. In addition, atranorin was formed, but was not detected in any of the voucher specimens. Red pigments were found in solid and liquid cultures. These were separated into two compounds, but could not be fully identified. R. celastri spores germinated, but did not form mycelia. R. dendriscoides, R. gracilis and R. sprengelii were not successfully cultivated in apo...Continue Reading

References

May 16, 2002·International Immunopharmacology·Patrícia Ma Stuelp-CampeloMarcello Iacomini

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Citations

May 23, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Antônio Sérgio Nascimento MoreiraIvo José Curcino Vieira
May 22, 2007·Mycological Research·Sergio Enrico Favero-LongoRosanna Piervittori
Sep 1, 2015·Fungal Biology·Chris Deduke, Michele D Piercey-Normore
Jun 2, 2005·FEMS Microbiology Letters·Rodrigo Arantes ReisGuilherme Lanzi Sassaki
Apr 3, 2014·Natural Product Reports·Laura P IócaRoberto G S Berlinck
May 19, 2011·FEMS Microbiology Letters·Lucimara M C CordeiroMarcello Iacomini
Nov 7, 2020·Natural Product Research·Bui-Linh-Chi HuynhThuc-Huy Duong

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