title: Green light reversal of blue-light-stimulated stomatal opening is found in a diversity of plant species.
abstract: Reversal by green light of blue-light-stimulated stomatal opening was found across a number of plant species, including leguminous and nonleguminous dicots and grass and nongrass monocots. Simultaneous exposure to equal fluence rates of blue and green light resulted in ∼50% reversal of normal blue light opening. Complete reversal occurred when the fluence rate of green light was approximately twice that of blue light. These results suggest that blue-green reversibility of stomatal opening is a basic photobiological property of guard cells. The blue-green reversibility of stomatal opening has been hypothesized to ensue from the cycling of two interconvertible, isomeric forms of the blue-light photoreceptor, zeaxanthin. Testing of blue-green reversibility could provide a valuable diagnostic tool for zeaxanthin-mediated blue-light photoperception.
authors.affiliation: Department of Organismic Biology, Ecology and Evolution, University of California, Los Angeles, 900 Veteran Ave., Los Angeles, California 90024 USA.
authors.forename: Lawrence D
authors.initials: LD
authors.lastname: Talbott
authors.forename: Ganka
authors.initials: G
authors.lastname: Nikolova
authors.forename: Arisa
authors.initials: A
authors.lastname: Ortiz
authors.forename: Irene
authors.initials: I
authors.lastname: Shmayevich
authors.forename: Eduardo
authors.initials: E
authors.lastname: Zeiger