Delay of Senescence of Detached Cucumber Cotyledons by Triadimefon

Changes in contents of reactive oxygen species (O2− and H2O2) and non-enzymatic antioxidants, activities of antioxidant enzymes and lipid peroxidation were investigated during senescence of detached cucumber cotyledons dipped in water (control) and 20 mg dm−3 triadimefon (TDM). O2− and H2O2 accumula...

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Bibliographic Details
Published inBiologia plantarum Vol. 46; no. 4; pp. 571 - 575
Main Authors Feng, Z.Z., Guo, A.H., Feng, Z.W.
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.01.2003
Subjects
Accumulation
Antioxidants
Ascorbic acid
Carotenoids
Catalase
Cotyledons
Cucumbers
Detaching
Hydrogen peroxide
L-Ascorbate peroxidase
Lipid peroxidation
Lipids
Oxidation
Peroxidase
Peroxidation
Reactive oxygen species
Senescence
Superoxide dismutase
Triadimefon
Vegetables
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Summary:Changes in contents of reactive oxygen species (O2− and H2O2) and non-enzymatic antioxidants, activities of antioxidant enzymes and lipid peroxidation were investigated during senescence of detached cucumber cotyledons dipped in water (control) and 20 mg dm−3 triadimefon (TDM). O2− and H2O2 accumulation and lipid peroxidation were observed during senescence of cucumber cotyledons, which coincided with a drop in the contents of carotenoids (Car) and ascorbic acid (AsA), and the activities of superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX), and an increase in the activity of peroxidase (POD). However, TDM could significantly inhibit the accumulation of O2− and H2O2, and lipid peroxidation by preventing the decrease of CAT, APX, Car and AsA and the increase of POD, while TDM had little effect on SOD activity during the senescence. Therefore we can draw a conclusion that TDM protects the membrane system and retards the senescence of detached cucumber cotyledons.
ISSN:0006-3134
1573-8264
DOI:10.1023/A:1024871713387