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Mycochrome system and the effect of molecular oxygen in the reversible photoinduction of conidiation in the fungus, Alternaria cichorii
Author(s) -
Kumagai Tadashi
Publication year - 1983
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1983.tb06285.x
Subject(s) - conidiation , conidium , fungus , blue light , ultraviolet radiation , alternaria , chemistry , biology , botany , biochemistry , mutant , optoelectronics , radiochemistry , gene , materials science
Coniditation the fungus, Alternaria cichorii Nattras (IMI 225641), was repeatedly induced and inhibited by alternating doses of near ultraviolet and blue radiation. The final response largely depended on the last kind of radiation administered. When the final radiation was near ultraviolet, conidiophore formation was induced, and conidia were then produced in the subsequent dark period; when it was blue, the induction of conidiation was suppressed. The inductive effect of near ultraviolet was promoted by anaerobiosis, but the reversing effect by blue radiation was not influenced by molecular oxygen. Thus, the “mycochrome” system apprears to control induction of conidiation in Alternaria cichorii , and oxidation‐reduction processes may be involved in its function.