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Potential of antioxidant enzymes in depicting drought tolerance of wheat (Triticum aestivum L.).
Indian J Biochem Biophys. 2012 Aug; 49(4):257-65.IJ

Abstract

In an effort to determine the biochemical markers for identifying genotypes before sowing for drought tolerance, changes in activities of antioxidant enzymes were determined in the seedlings of five drought-tolerant and five drought-sensitive wheat (Triticum aestivum L.) genotypes, each with different genetic background growing under normal and water deficit conditions induced by 6% mannitol. In comparison with non-stressed seedlings, the catalase (CAT) activity was upregulated by more than 50% in the roots of water-stressed seedlings in drought-tolerant genotypes. Water deficit stress also led to the upregulation of ascorbate peroxidase (APX) in the endosperms and glutathione reductase (GR), CAT and peroxidase (POD) in the shoots of stressed seedlings in drought-tolerant genotypes. Superoxide dismutase (SOD) activity was very low in roots and shoots and showed non-significant increase under water-stress in tolerant genotypes. Out of five specified enzyme activities (CAT in roots and shoots, APX in endosperms, GR and POD in shoots), if any three are upregulated in the specified tissues under water deficit conditions, the genotype is likely to be drought-tolerant. Wheat seedlings with low GR and APX activities and high POD activity in shoots with a low ratio of GR activity of shoot to root of non-stressed seedlings are likely to perform better under rainfed conditions. The observed data showed that status of antioxidant enzymes could provide a meaningful tool for depicting drought tolerance of a wheat genotype.

Authors+Show Affiliations

Department of Biochemistry, Punjab Agricultural University, Ludhiana 141004, Punjab, India.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23077787

Citation

Devi, Rachana, et al. "Potential of Antioxidant Enzymes in Depicting Drought Tolerance of Wheat (Triticum Aestivum L.)." Indian Journal of Biochemistry & Biophysics, vol. 49, no. 4, 2012, pp. 257-65.
Devi R, Kaur N, Gupta AK. Potential of antioxidant enzymes in depicting drought tolerance of wheat (Triticum aestivum L.). Indian J Biochem Biophys. 2012;49(4):257-65.
Devi, R., Kaur, N., & Gupta, A. K. (2012). Potential of antioxidant enzymes in depicting drought tolerance of wheat (Triticum aestivum L.). Indian Journal of Biochemistry & Biophysics, 49(4), 257-65.
Devi R, Kaur N, Gupta AK. Potential of Antioxidant Enzymes in Depicting Drought Tolerance of Wheat (Triticum Aestivum L.). Indian J Biochem Biophys. 2012;49(4):257-65. PubMed PMID: 23077787.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Potential of antioxidant enzymes in depicting drought tolerance of wheat (Triticum aestivum L.). AU - Devi,Rachana, AU - Kaur,Narinder, AU - Gupta,Anil Kumar, PY - 2012/10/20/entrez PY - 2012/10/20/pubmed PY - 2013/6/8/medline SP - 257 EP - 65 JF - Indian journal of biochemistry & biophysics JO - Indian J. Biochem. Biophys. VL - 49 IS - 4 N2 - In an effort to determine the biochemical markers for identifying genotypes before sowing for drought tolerance, changes in activities of antioxidant enzymes were determined in the seedlings of five drought-tolerant and five drought-sensitive wheat (Triticum aestivum L.) genotypes, each with different genetic background growing under normal and water deficit conditions induced by 6% mannitol. In comparison with non-stressed seedlings, the catalase (CAT) activity was upregulated by more than 50% in the roots of water-stressed seedlings in drought-tolerant genotypes. Water deficit stress also led to the upregulation of ascorbate peroxidase (APX) in the endosperms and glutathione reductase (GR), CAT and peroxidase (POD) in the shoots of stressed seedlings in drought-tolerant genotypes. Superoxide dismutase (SOD) activity was very low in roots and shoots and showed non-significant increase under water-stress in tolerant genotypes. Out of five specified enzyme activities (CAT in roots and shoots, APX in endosperms, GR and POD in shoots), if any three are upregulated in the specified tissues under water deficit conditions, the genotype is likely to be drought-tolerant. Wheat seedlings with low GR and APX activities and high POD activity in shoots with a low ratio of GR activity of shoot to root of non-stressed seedlings are likely to perform better under rainfed conditions. The observed data showed that status of antioxidant enzymes could provide a meaningful tool for depicting drought tolerance of a wheat genotype. SN - 0301-1208 UR - https://www.unboundmedicine.com/medline/citation/23077787/Potential_of_antioxidant_enzymes_in_depicting_drought_tolerance_of_wheat__Triticum_aestivum_L___ L2 - https://medlineplus.gov/antioxidants.html DB - PRIME DP - Unbound Medicine ER -