Biologia plantarum 44:89-94, 2001 | DOI: 10.1023/A:1017926522514
Comparison of Hexaploid and Tetraploid Wheat Cultivars in their Responses to Water Stress
- 1 Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi-, India
We studied the effect of water stress imposed at anthesis and pre-anthesis stages on oxidative stress and antioxidant activity in four wheat cultivars, two hexaploid Triticum aestivum cultivars, drought resistant cv. C 306 and drought susceptible cv. Hira, and two tetraploid cultivars, T. durum cv. A 9-30-1 and T. dicoccum cv. HW 24. Water stress decreased relative water content (RWC), membrane stability index (MSI), and increased H2O2 and malondialdehyde (MDA) contents as well as activity of superoxide dismutase (SOD), catalase (Cat) and peroxidase (POX) in all the genotypes at all the stages. Both the tetraploid cultivars showed higher RWC, MSI and SOD activity, and lower H2O2 and MDA contents under water stress than hexaploid ones. Cat and POX activities were highest in C 306.
Keywords: catalase; hydrogen peroxide; malondialdehyde; membrane stability index; peroxidase; ploidy level; superoxide dismutase; Triticum aestivum; T. dicoccum; T. durum; water stress
Subjects: catalase, ploidy level, water stress; catalase, salt stress; malondialdehyde; membrane stability index; peroxidases, ploidy level, cultivardifferences; ploidy level; superoxide dismutase, ploidy level, water stress; Triticum aestivum; Triticum dicoccum; Triticum durum
Published: March 1, 2001 Show citation
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