Peroxidase‐mediated chlorophyll bleaching in degreening canola (Brassica napus) seeds and its inhibition by sublethal freezing
- 1 November 1990
- journal article
- Published by Wiley in Physiologia Plantarum
- Vol. 80 (3) , 453-459
- https://doi.org/10.1111/j.1399-3054.1990.tb00067.x
Abstract
Peroxidase activity in isolated thylakoids from degreening canola (Brassica napus cv. Westar) seeds was demonstrated. The enzyme catalyzes the degradation of thylakoid‐bound pigments in the presence of H2O2 and 2,4‐dichlorophenol. Peroxidase activity is related to degreening, with periods of rapid degreening associated with high enzyme activity. Both de novo synthesis and substrate availability appear to control enzyme activity. Peroxidase is initially inhibited and then stimulated by sublethal freezing. Therefore, inhibition of peroxidase activity following sublethal freezing may be responsible, in part, for a failure of the seed to degreen.Keywords
This publication has 30 references indexed in Scilit:
- Lounging in a lysosome: the intracellular lifestyle of Coxiella burnetiiCellular Microbiology, 2007
- Hormonal Regulation, and Intracellular Localization of a 33-kD Cationic Peroxidase in Excised Cucumber CotyledonsPlant Physiology, 1989
- Correlation between Auxin Resistance and the Lack of a Membrane-Bound Auxin Binding Protein and a Root-Specific Peroxidase in Nicotiana tabacumPlant Physiology, 1988
- Induction of 33-kD and 60-kD Peroxidases during Ethylene-Induced Senescence of Cucumber CotyledonsPlant Physiology, 1988
- Chlorophyll metabolism in higher plants. VII. Chlorophyll degradation in senescing tobacco leaves; phenolic-dependent peroxidative degradationCanadian Journal of Botany, 1987
- Uptake and Processing of the Precursor to the Small Subunit of Ribulose 1,5-Bisphosphate Carboxylase by Leucoplasts from the Endosperm of Developing Castor Oil SeedsPlant Physiology, 1986
- Leaf Senescence: Correlated with Increased Levels of Membrane Permeability and Lipid Peroxidation, and Decreased Levels of Superoxide Dismutase and CatalaseJournal of Experimental Botany, 1981
- A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye bindingAnalytical Biochemistry, 1976
- Peroxidase and Glucose-6-phosphate Dehydrogenase Levels in Cotyledons ofCucumis sativus(L.)Journal of Experimental Botany, 1972
- Cleavage of Structural Proteins during the Assembly of the Head of Bacteriophage T4Nature, 1970