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Effect of propagators and inhibitors on the ultraweak luminescence from maize roots

✍ Scribed by Radotić, K. ;Redenović, Č. ;Jeremić, M. ;Vučinić, Ž.

Publisher
John Wiley and Sons
Year
1990
Weight
374 KB
Volume
5
Category
Article
ISSN
0884-3996

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✦ Synopsis

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 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.

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