Abstract
The effects of Zn deficiency on antioxidant responses of two pea (Pisum sativum L.) genotypes, a Zn-efficient IPFD-99-13 and Zn-inefficient KPMR-500, grown in sand culture were studied. In the pea genotype KPMR-500, Zn deficiency decreased dry matter yield, tissue Zn concentration, and antioxidant enzyme activities istronger than in the genotype IPFD-99-13. Genotype IPFD-99-13 developed more efficient antioxidant system to scavenge ROS than genotype KPMR-500. Zinc deficiency produced oxidative damage to pea genotypes due to enhanced accumulation of TBARS and H2O2 and decreased activities of antioxidant enzymes (Cu/Zn superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbate peroxidase (APX)). In the leaves of IPFD-99-13 genotype, the higher activity of ROS-scavenging enzyme, e.g., SOD, CAT, POD, and glutathione reductase, and antioxidants, such as ascorbate and non-protein thiols, led to the lower accumulation of H2O2 and lipid peroxides. These results suggest that, by maintaining an efficient antioxidant defense system, the IPFD-99-13 genotype shows a lower sensivity to Zn deficiency than the KPMR-500 genotype.
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Abbreviations
- APX:
-
ascorbate peroxidase
- CA:
-
carbonic anhydrase
- Car:
-
carotenoids
- CAT:
-
catalase
- Chl:
-
chlorophyll
- Cu/Zn SOD:
-
copper/zinc superoxide dismutase
- DHAR:
-
dehydroascorbate reductase
- GR:
-
glutathione reductase
- NPT:
-
non-protein thiols
- POD:
-
peroxidase
- TBARS:
-
thiobarbituric acid-reactive substances
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Published in Fiziologiya Rastenii, 2012, Vol. 59, No. 2, pp. 225–231.
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Pandey, N., Gupta, B. & Pathak, G.C. Antioxidant responses of pea genotypes to zinc deficiency. Russ J Plant Physiol 59, 198–205 (2012). https://doi.org/10.1134/S1021443712010141
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DOI: https://doi.org/10.1134/S1021443712010141