title: Red Light Stimulates an Increase in Intracellular Calcium in the Spores of Onoclea sensibilis.
abstract: Red light (R) stimulates an increase in the total concentration of intracellular calcium in the spores of Onoclea sensibilis L. as determined by atomic absorption spectroscopy. Subsequent exposure to far-red light inhibits the R-induced increase in intracellular calcium. The majority of the increase occurs 5 minutes after the onset of irradiation. The calcium antagonist, La(3+), inhibits both germination and the R-induced increase in intracellular calcium. The R-induced increase in calcium is sufficient to account for an increase in the concentration of intracellular calcium ions from 0.1 micromolar to 1 to 10 micromolar. Large detectable changes in other elements tested are not required for germination.
authors: Department of Botany, University of Massachusetts, Amherst, Massachusetts 01003.
authors: R
authors: R
authors: Wayne
authors: P K
authors: PK
authors: Hepler