title: Effect of propagators and inhibitors on the ultraweak luminescence from maize roots.
abstract: This study has investigated the kinetics and mechanism of ultraweak luminescence in maize roots. Mannitol induced the second maximum and enhanced the main maximum of the relative intensity of luminescence from the roots. Hydroquinone and quinone enhanced the relative intensity of the luminescence. Catalase enhanced the maximum of the luminescence and changed the kinetics of the light emission. The effect of catalase on the kinetics was abolished by superoxide dismutase. Ascorbate in the presence of catalase on the kinetics was abolished by superoxide dismutase. Ascorbate in the presence of catalase reduced the luminescence maximum, but did not alter the kinetics. In the presence of catalase only, or in the combination with superoxide dismutase, or ascorbate, the luminescence intensity in the stationary phase was significantly lower compared to the control. The results support the participation of superoxide-radical, singlet oxygen, electron transfer and the role of peroxidase in the reactions generating ultraweak luminescence in the roots. Ascorbate, catalase and superoxide dismutase have a protective role in the luminescent reactions.
authors.affiliation: Maize Research Institute Zemun Polje, Biophysical Laboratory, Belgrade, Yugoslavia.
authors.forename: K
authors.initials: K
authors.lastname: Radotić
authors.forename: C
authors.initials: C
authors.lastname: Redenović
authors.forename: M
authors.initials: M
authors.lastname: Jeremić
authors.forename: Z
authors.initials: Z
authors.lastname: Vucinić
mesh_terms: D001205:Ascorbic Acid / Q000494:pharmacology; D002374:Catalase / Q000494:pharmacology; D005609:Free Radicals; D006873:Hydroquinones / Q000494:pharmacology; D007700:Kinetics; D008163:Luminescent Measurements; D008353:Mannitol / Q000494:pharmacology; D010944:Plants / Q000187:drug effects / Q000378:metabolism; D013482:Superoxide Dismutase / Q000494:pharmacology; D013481:Superoxides / Q000378:metabolism; D003313:Zea mays / Q000187:drug effects / Q000378:metabolism
chemical_list: D005609:Free Radicals; D006873:Hydroquinones; D013481:Superoxides; D008353:Mannitol; D002374:Catalase; D013482:Superoxide Dismutase; D001205:Ascorbic Acid; C031927:hydroquinone