PHOTOMORPHOGENESIS IN Penicillium isariaeforme: EXOGENOUS CALCIUM SUBSTITUTES FOR LIGHT |
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| Authors: | GANAPATHY MUTHUKUMAR ELLEN C JENSEN ANN W NICKERSON MARK K ECKLES KENNETH W NICKERSON |
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| Institution: | Department of Physiology &Biophysics, UMDNJ, Piscataway, NJ 08854, USA;Department of Biological Sciences, St John's University, Collegeville, MN 56321, USA;School of Biological Sciences &Institute for Cellular and Molecular Photobiology, University of Nebraska, Lincoln, NE 68588, USA |
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| Abstract: | Abstract— Penicillium isariaeforme is a photomorphogenic fungus which produces upright bundles of conidia-bearing mycelia (called coremia) when grown on a defined medium in visible (450–500 nm) light. We found that exogenous Ca2+ ions could substitute for light. In the dark 1–2 m M Ca2+ triggered coremia formation. Dark induction of coremia was specific for Ca2+ in that it could not be duplicated by 50 m M Ba2+, Fe2+, Mg2+, Mn2+, Sr2+, or Zn2+. Additionally, light-induced coremia formation was inhibited by both KI (2.5 m M ) and phenylacetic acid (0.25 m M ). |
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