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), Journal Name: Plant Physiol.; (United States) Vol. 67:5; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

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