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Light‐induced linear dichroism in photoreversibly photochromic sensor pigments. – VI. Relation between the two pigments of the mycochrome system in Alternaria cichorii
Author(s) -
Kumagai Tadashi,
Björn Lars Olof
Publication year - 1984
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.1399-3054.1984.tb04910.x
Subject(s) - pigment , linear dichroism , chemistry , phytochrome , photochromism , blue light , absorption (acoustics) , photochemistry , circular dichroism , biophysics , crystallography , biology , optics , red light , botany , physics , organic chemistry
Conidiation in Alternaria cichorii Nattras is reversibly stimulated by near ultraviolet radiation (NUV, ca 313 nm) and inhibited by blue light (ca 450 nm) and seems to be a mycochrome‐mediated process. After induction with plane‐polarized NUV, blue light polarized perpendicularly to the NUV was more effective in counteracting the induction than was blue light polarized parallel to the NUV. From this the conclusions are drawn that (a) both the blue‐absorbing component (presumably a flavo‐protein) and the P NUV of the mycochrome system are membrane‐bound and that (b) the transition moment associated with blue light absorption in the presumed flavoprotein forms an angle of at least 53° with the transition moment associated with NUV absorption in P NUV .