Abstract
In order to examine the effect of different light quality on the germination of Echinochloa crus-galli (L.) Beauv. seeds and Digitaria adscendens (H.B.K.) Henr. seeds, the germination test was carried out under the conditions of green light, red light, far-red light, filtrated light through cheese cloth, full natural light, or dark. In addition, to examine whether phytochrome function is involved in the light effect on termination of both species, another germination test was carried out using seeds under the alternate radiation of red and far-red lights. In both species, the germination percentage was in the order of light≒filtrated light through cheese cloth≒redlight>green light>far-red light≒dark, there were significant differences among light qualities (p<0.05). In addition the promoting effect of red light on germination of both species was negated by far-red light. Oppositely the effect of far-red light on germination of both species was negated by red light. These results suggest that the promoting effect of lighton the germination of both species depends on red light. Also there is a strong possibility that phytochrome function is involved in the light germination of both species.
