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Abstract:

The ascomycete Saccobolus platensis Gamundí & Ranalli requires light to produce apothecia. It has now been found that this light requirement can be satisfied by a 24-h pulse of white light at certain stages of the sexual cycle. The addition of exogenous N6,O2′-dibutyryl adenosine 3′,5′-cyclic monophosphate (db-cyclic AMP) to the dark growing mycelia could replace rather efficiently the inductory effect of light; cyclic AMP, N6-monobutyryl cyclic AMP, and O2′-monobutyryl cyclic AMP were less effective, while guanosine 3′,5′-cyclic monophosphate (cyclic GMP) was a very weak inducer. An inducing effect similar to that of db-cyclic AMP was obtained by the addition of 3-isobutyl-1-methylxanthine (MIX) or theophylline to cultures developing in darkness. In the presence of theophylline, endogenous cyclic AMP levels of dark-grown mycelia were several fold higher than those of control cultures. The cyclic AMP content of mycelia growing under different light regimes was measured and no significant differences were observed. However, cultures submitted to white light showed an increase in adenylate cyclase (ATP pyrophosphate-lyase (cyclizing), EC 4.6.1.1) and a decrease in cyclic AMP phosphodiesterase (3′,5′-cyclic AMP 5′-nucleotidohydrolase, EC 3.1.4.17) specific activities compared with the activities of dark-grown mycelia. The cyclic AMP phosphodiesterase activity was strongly inhibited by theophylline and by MIX. The possible role of cyclic AMP in the induction of apothecia in this species is discussed. © 1984.

Registro:

Documento: Artículo
Título:The effect of light and cyclic AMP metabolism on fruiting body formation in Saccobolus platensis
Autor:Galvagno, M.A.; Forchiassin, F.; Cantore, M.L.; Passeron, S.
Filiación:Departamento de Ciencias Biológicas y, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon II, 1428 Buenos Aires, Argentina
Programa de Regulación Hormonal y Metabólica, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon II, 1428 Buenos Aires, Argentina
Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon II, 1428 Buenos Aires, Argentina
Palabras clave:cyclic AMP metabolism; light; Saccobolus platensis; sexual morphogenesis
Año:1984
Volumen:8
Número:4
Página de inicio:334
Página de fin:341
DOI: http://dx.doi.org/10.1016/0147-5975(84)90057-4
Título revista:Experimental Mycology
Título revista abreviado:Exp. Mycol.
ISSN:01475975
CODEN:EXMYD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01475975_v8_n4_p334_Galvagno

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Citas:

---------- APA ----------
Galvagno, M.A., Forchiassin, F., Cantore, M.L. & Passeron, S. (1984) . The effect of light and cyclic AMP metabolism on fruiting body formation in Saccobolus platensis. Experimental Mycology, 8(4), 334-341.
http://dx.doi.org/10.1016/0147-5975(84)90057-4
---------- CHICAGO ----------
Galvagno, M.A., Forchiassin, F., Cantore, M.L., Passeron, S. "The effect of light and cyclic AMP metabolism on fruiting body formation in Saccobolus platensis" . Experimental Mycology 8, no. 4 (1984) : 334-341.
http://dx.doi.org/10.1016/0147-5975(84)90057-4
---------- MLA ----------
Galvagno, M.A., Forchiassin, F., Cantore, M.L., Passeron, S. "The effect of light and cyclic AMP metabolism on fruiting body formation in Saccobolus platensis" . Experimental Mycology, vol. 8, no. 4, 1984, pp. 334-341.
http://dx.doi.org/10.1016/0147-5975(84)90057-4
---------- VANCOUVER ----------
Galvagno, M.A., Forchiassin, F., Cantore, M.L., Passeron, S. The effect of light and cyclic AMP metabolism on fruiting body formation in Saccobolus platensis. Exp. Mycol. 1984;8(4):334-341.
http://dx.doi.org/10.1016/0147-5975(84)90057-4