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Influence of ascorbate-recycling, light and temperature during tomato fruit ripening on ascorbate pool and ascorbate-degradation

100%

Truffault V., Gautier H., Stevens R.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

2013

tom 94

nr 2

Effect of Mn on photosynthetic parameters of C3 Cleome spinosa and C4 Cleome gynandra in conjugation with antioxidant defense

80%

Dinc A., Turkan I., Sekmen A., Uzilday B.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

2013

tom 94

nr 2

Antioxidative defense system in lupin roots exposed to increasing concentrations of lead

80%

Rucinska-Sobkowiak R., Pukacki P. M.

Acta Physiologiae Plantarum

2006

tom 28

nr 4

Yellow lupin (Lupinus luteus) cv. Juno seedlings exposed to increasing concentrations of Pb²⁺ (50-350 mg l⁻¹) were analysed in respect to its effect on the degradation of lipids, the content of antioxidants (ascorbate, α-tocopherol) and the activity of the ascorbate glutathione cycle enzymes (dehydroascorbate reductase DAR; EC 1.8.5.1 and glutathione reductase GR; EC 1.6.4.2). Lipid peroxidation, expressed as the content of TBArm (thiobarbituric acid reactive metabolites), increased only at 50 and 100 mgl⁻¹ Pb²⁺, whereas at higher lead concentrations it decreased as compared with the control. The level of free fatty acids was not significantly affected as a result of Pb²⁺ exposure, except for 300 mgl⁻¹ Pb²⁺. The content of α-tocopherol increased significantly at the range of concentrations between 150 and 300 mgl⁻¹ and at these concentrations lipid peroxidation was inhibited. Ascorbic acid (AA) and dehydroascorbic acid (DHA) content increased considerably in roots treated with 100 and 150 mgl⁻¹ Pb²⁺. In general the activity of DHAR and GR was stimulated by lead, however at higher Pb²⁺ concentrations (300 and 350 mgl⁻¹) GR revealed lower enzymatic activtty. Our results suggest that in lead-treated roots lipids might be protected against reactive oxygen species (ROS) by lipid-soluble molecules of α-tocopherol and this direct defense seems to be supported by AA as well as the enzymes: DHAR and GR.

Ograniczanie wyników

2 BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

1 Acta Physiologiae Plantarum

1 Dinc A.

1 Gautier H.

1 Pukacki P. M.

1 Rucinska-Sobkowiak R.

1 Sekmen A.

1 Stevens R.

1 Truffault V.

1 Turkan I.

1 Uzilday B.

2 2013

1 2006

Wyniki wyszukiwania

Influence of ascorbate-recycling, light and temperature during tomato fruit ripening on ascorbate pool and ascorbate-degradation

Effect of Mn on photosynthetic parameters of C3 Cleome spinosa and C4 Cleome gynandra in conjugation with antioxidant defense

Antioxidative defense system in lupin roots exposed to increasing concentrations of lead