Sairam, R K and Chandrasekhar, V and Srivastava, G C (2001) Comparison of hexaploid and tetraploid wheat cultivars in their responses to water stress. Biologia Plantarum, 44 (1). pp. 89-94.
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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.
|Uncontrolled Keywords:||catalase; hydrogen peroxide; malondialdehyde; membrane stability index; peroxidase; ploidy level; superoxide dismutase; Triticum aestivum; T. dicoccum; T. durum; water stress|
|Subjects:||Agricultural Sciences and Technology > Plant Physiology|
|Deposited By:||Dr Sridhar Gutam|
|Deposited On:||25 Jun 2010 16:55|
|Last Modified:||25 Jun 2010 16:55|
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