1982•Physiologia PlantarumRequires access

Light‐induced absorbance changes in the fungus Verticillium agaricinum

Ke‐Cheng Hsiao, Lars Olof Björn

Abstract

Light‐induced absorbance changes were investigated in vivo in the fungus Verticillium agaricinum (Link) Corda. There was a broad light‐induced absorbance decrease in the blue and near UV with a maximum at 384 nm. An action spectrum indicated that the absorbance changes were due to photo‐bleaching of a pigment with an absorption spectrum that was similar to the action spectrum. Neither redox reactions nor energy metabolism were involved in the photo‐bleaching process. A direct comparison of action spectra for light‐induced absorbance changes and photo‐induction of carotenogenesis suggests that the photo‐bleaching may not be related to photo‐induction of carotenogenesis.

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Key concepts: Absorbance, Action spectrum, Verticillium, Pigment, Photochemistry, Blue light, Absorption (acoustics), Absorption spectroscopy