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Regulation of growth and cercosporin photo induction in cercospora beticola

, : Regulation of growth and cercosporin photo induction in cercospora beticola. Transactions of the British Mycological Society 73(2): 311-328

The production of cercosporin, a pigment of the leaf spot pathogen of sugar beet, C. beticola Sacc., was induced by blue light Cercosporin photoinduction was O2 and CO2 dependent. Cercosporin production evidently is a biphasic phenomenon; the initial CO2 sensitive, light-independent steps represent the accumulation of intermediates which are then converted to cercosporin by light-dependent, CO2 insensitive steps. Those results, along with action spectral evidence, isolation of a pigment-protein complex and indications of cercosporin involvement in terminal respiration suggest the possibility that quinones may fulfil the role of photoreceptor compounds in this organism.

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Related references

Balis, C.; Payne, M.G., 1971: Triglycerides and cercosporin from Cercospora beticola: fungal growth and cercosporin production. At Colo Sta. Univ., Fort Collins, phytotoxic compounds isolated from C. beticola included cercosporin and triglycerides having octadecenoic, octadecadienoic, octadecatrienoic and hexadeanoic acids. Cercosporin was photosensitive at >pH 7.7. Lig...

Assante G.; D'ambra V.; Locci R.; Mutto S., 1981: Production of cercosporin and cercospora beticola toxin in isolates of cercospora beticola. The ability of C. beticola Sacc. isolates, mostly obtained from Italy, to form cercosporin and CBT was tested. In vitro the former is more frequently produced than the latter. All the 45 isolates tested produced cercosporin and only 9 produced CBT...

Assante, G.; D.A.bra, V.; Locci, R.; Mutto, S., 1981: Production of cercosporin and CBT in isolates of Cercospora beticola. Of 45 isolates, mostly from Italy, all produced cercosporin and only 9 CBT in detectable amounts in vitro. No correlation between pathogenicity to beet and toxin production could be established.

Lartey, R.T.; Caesar Tonthat, T., 2002: A bioassay for photosensitizing perylenequinone cercosporin of Cercospora beticola. Cercosporin is a broad-spectrum photosensitizing perylenequinone toxin that is produced by several members of the genus Cercospora. In addition to symptom development, cercosporin has been reported to be toxic to several organisms including mice,...

Steinkamp M.P.; Martin S.S.; Hoefert L.L.; Ruppel E.G., 1981: Ultrastructure of lesions produced in leaves of beta vulgaris by cercosporin a toxin from cercospora beticola. Lesions induced in leaves of B. vulgaris 5 days after application of cercosporin, 1 of 2 or more toxic metabolites produced by the fungus C. beticola, were examined by EM and compared with a published report of lesions incited by the fungus. Both...

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Verma P.R.; Agnihotri J.P., 1972: Effect of nutrition ph and temperature on growth and sporulation of cercospora cruenta and cercospora beticola. Phytopathologia Mediterranea 11(1): 25-29