Light-suppressed germination of California poppy seed

Abstract
Germination of California poppy seed was suppressed by white light from fluorescent and incandescent lamps. Seeds were most sensitive to light-suppression of germination during a period between 8 and 12 h from start of imbibition. Far-red, red, and blue wavelength bands were suppressive with far-red being most effective. Although they interacted, photoreversibility of red and far-red radiations did not occur. Addition of nitrate ion or of kinetin increased suppressive effects of far-red and of red radiations. Gibberellic acid relieved suppressions of germination induced by continuous radiation.

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