SPECTRAL SENSITIVITY OF SEED GERMINATION IN ARTEMISIA MONOSPERMA1

Abstract

The absolute requirement for light in the germination of achenes of Artemisia monosperma is as satisfied by radiant energy in the blue, green, yellow, red and far-red regions of the visible spectrum, as by unfiltered white light. The same stimulation was obtained by a short irradiation as by an uninterrupted one. Phytochrome seems to be either absent, or masked by a different pigment which absorbs light in the entire visible spectrum and thus initiates germination.