Photomorphogenesis in Pteris vittata IV. Action spectra for inhibition of phytochrome-dependent spore germination

Action spectra between 350 and 500 nm for the inhibition ofphytochrome-dependent spore germination in the fern Pteris vittatawere obtained. Both action spectra obtained before and afterred light irradiation have peaks at about 440 nm and 380 nmand shoulders from 440 to 480 nm. These results suggest thatthe phytochrome system is not involved in the inhibitory processof spore germination induced by short irradiation with bluelight. (Received October 8, 1970; )