Phytochrome Mediated Carotenoid Synthesis in the Fungus Verticillium Agarzcznum

Ten minutes of red irradiation (R) increased carotenogenesis in Verticillium agoricinum and this effect was reversed by 10min of far‐red (FR) irradiation indicating that phytochrome is involved. A far‐red minus red difference spectrum of a crude extract shows a peak at 670 nm and a dip at 750 nm wavelength, values slightly larger than higher plant phytochrome. indicating the presence of phytochrome.