Effect of xenon on the excited states of phototropic receptor flavin in corn seedlings

Journal Article · Fri May 01 00:00:00 EDT 1981 · Plant Physiol.; (United States)

DOI:https://doi.org/10.1104/pp.67.5.996· OSTI ID:6408215

Vierstra, R D ^[1]; Poff, K L; Walker, E B; Song, P S

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1. Michigan State Univ., East Lansing

The chemically inert, water-soluble heavy atom gas, xenon, at millimolar concentrations specifically quenches the triplet excited state of flavin in solution without quenching the flavin singlet excited state. The preferential quenching of the flavin triplet over the singlet excited state by Xe has been established by showing that the flavin triplet-sensitized photooxidation of NADH is inhibited while the fluorescence intensity and lifetime of flavin are not affected by Xe. No significant inhibition of phototropism and geotropism by Xe was observed, suggesting that a flavin singlet state is more likely involved than the triplet state in the primary photoprocess of phototropism in corn.

• DOE Contract Number: EY-76-C-02-1338
• OSTI ID: 6408215
• Journal Information: Plant Physiol.; (United States), Vol. 67:5
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
ISOALLOXAZINES
CHEMICAL STATE
QUENCHING
XENON
BIOLOGICAL EFFECTS
MAIZE
NADH2
NITROGEN
PHOTOCHEMICAL REACTIONS
RECEPTORS
SEEDLINGS
CEREALS
CHEMICAL REACTIONS
COENZYMES
ELEMENTS
FLUIDS
GASES
GRAMINEAE
GRASS
HETEROCYCLIC COMPOUNDS
NONMETALS
NUCLEOTIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PLANTS
RARE GASES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)
550200 - Biochemistry