title: Ecological Significance of Red Light Sensitivity in Germination of Tobacco Seed.
abstract: The light transmission of different soil materials was measured in a Beckman spectrophotometer. The relative energy transmission was greatest at the red end of the spectrum. A seed sensitive to red light will have the capacity to germinate at nearly the maximum depth of penetration by visible light, where the risk of early desiccation is diminished.
authors.forename: P V
authors.initials: PV
authors.lastname: Wells