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Abstract:

A strain of the lichen mycobiont of Caloplaca erythrantha, isolated from ascospores, was cultured axenically on different solid media. Four of the media employed supported the development of colonies and production of the two major lichen secondary metabolites. These media were: BMYE (mannitol 2%, yeast extract 0.1%, in Bold's basal medium); MEYE (malt extract 2%, yeast extract 0.2%, in distilled water); Hamada's MY10 (malt extract 1%, yeast extract 0.4%, sucrose 10%, in distilled water); and the new BMRM (Bold mannitol rich medium, mannitol 5.3%, malt extract 1%, yeast extract 0.4% in Bold's mineral medium). Percentages refer to final medium volume. The fungal colonies developed well on the four media and produced emodin and 7-chloroemodin, the major secondary compounds of the lichen apothecia. Crystals deposited richly on the external surface of the hyphae, as observed with an optical microscope. The two anthraquinones were purified from the lichen thallus, apothecia and cultured mycelia, and identified by chromatographic (TLC, HPLC) and spectroscopic (NMR, MS) methods. The analysis of lichen apothecia revealed the presence of emodin (0.90% w/w) and 7-chloroemodin (0.56% w/w), whereas colonies cultured for five months generally produced higher percentages than the lichen: 1.72% emodin and 0.30% 7-chloroemodin on BMYE; 0.21% and 0.95% on MEYE; 7.82% and 7.48% on MY10; and 11.70% and 10.80% on BMRM. These results show that the production of both anthraquinones was promoted significantly in mycobiont cultures with high concentrations of the carbon sources sucrose or mannitol, with a higher effect being observed with the latter. © 2012 British Lichen Society.

Registro:

Documento: Artículo
Título:Culture studies on the mycobiont of Caloplaca erythrantha (Tuck.) Zahlbr. (Teloschistaceae): High production of major lichen secondary metabolites
Autor:Fazio, A.T.; Adler, M.T.; Bertoni, M.D.; Maier, M.S.
Filiación:UMYMFOR-Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Ciudad Autónoma de Buenos Aires, Argentina
PROPLAME-PRHIDEB Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Ciudad Autónoma de Buenos Aires, Argentina
Palabras clave:7-chloroemodin; anthraquinones; axenic cultures; emodin; HPLC; spectroscopic methods; Caloplaca erythrantha; Fungi; Teloschistaceae
Año:2012
Volumen:44
Número:4
Página de inicio:533
Página de fin:542
DOI: http://dx.doi.org/10.1017/S0024282912000096
Título revista:Lichenologist
Título revista abreviado:Lichenologist
ISSN:00242829
CODEN:LCHNB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00242829_v44_n4_p533_Fazio

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Citas:

---------- APA ----------
Fazio, A.T., Adler, M.T., Bertoni, M.D. & Maier, M.S. (2012) . Culture studies on the mycobiont of Caloplaca erythrantha (Tuck.) Zahlbr. (Teloschistaceae): High production of major lichen secondary metabolites. Lichenologist, 44(4), 533-542.
http://dx.doi.org/10.1017/S0024282912000096
---------- CHICAGO ----------
Fazio, A.T., Adler, M.T., Bertoni, M.D., Maier, M.S. "Culture studies on the mycobiont of Caloplaca erythrantha (Tuck.) Zahlbr. (Teloschistaceae): High production of major lichen secondary metabolites" . Lichenologist 44, no. 4 (2012) : 533-542.
http://dx.doi.org/10.1017/S0024282912000096
---------- MLA ----------
Fazio, A.T., Adler, M.T., Bertoni, M.D., Maier, M.S. "Culture studies on the mycobiont of Caloplaca erythrantha (Tuck.) Zahlbr. (Teloschistaceae): High production of major lichen secondary metabolites" . Lichenologist, vol. 44, no. 4, 2012, pp. 533-542.
http://dx.doi.org/10.1017/S0024282912000096
---------- VANCOUVER ----------
Fazio, A.T., Adler, M.T., Bertoni, M.D., Maier, M.S. Culture studies on the mycobiont of Caloplaca erythrantha (Tuck.) Zahlbr. (Teloschistaceae): High production of major lichen secondary metabolites. Lichenologist. 2012;44(4):533-542.
http://dx.doi.org/10.1017/S0024282912000096