Leaf dehydroascorbate reductase and catalase activity is associated with soil drought tolerance in bread wheat

• Autorzy: Osipova S.V. , Permyakov A. V. , Permyakova M. D. , Pshenichnikova T. A. , Borner A.
• Języki publikacji: EN

Abstrakty

EN

A number of morphological, physiological and phenological traits have been suggested as significant markers of adaptation to drought in bread wheat (Triticum aestivum L.). This study was aimed at the identification of a relationship between dehydroascorbate reductase (DHAR, EC 1.8.5.1) and catalase (CAT, EC 1.11.1.6) activities in leaves of wheat plants and stability of yield components under water deficit. The single chromosome substitution lines of cv. Chinese Spring carrying separate chromosomes from the donor Synthetic 6x, an artificial hexaploid combining the genomes of the two wild species, Triticum dicoccoides (AABB) and Aegilops tauschii (DD), were the objects of the investigations. The activities of the DHAR and CAT were correlated with flag leaf relative water content and two indexes of stability of grain yield components under drought across the set substitution lines. The lines carrying a synthetic hexaploid homologous pair of chromosomes 1B, 1D, 2D, 3D or 4D all expressed a low constitutive level of DHAR and the lines carrying chromosomes 3B, 1D, 2D and 3D a low constitutive level of CAT. All were able to increase this level (by fourfold for DHAR and by 1.5-fold for CAT) in response to stress caused by water deficit. When challenged by drought stress, these lines tended to be the most effective in retaining the water status of the leaves and preventing the grain yield components from being compromised. The discovered genetic variability for enzymes activity in leaves of wheat might be a useful selection criterion for drought tolerance.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2011
• Tom: 33
• Numer: 6
• Opis fizyczny: p.2169-2177,fig.,ref.

Twórcy

autor

Osipova S.V.

• Siberian Institute of Plant Physiology and Biochemistry SB RAS, P.O. Box 317, 664033 Irkutsk, Russia

autor

Permyakov A. V.

• Siberian Institute of Plant Physiology and Biochemistry SB RAS, P.O. Box 317, 664033 Irkutsk, Russia

autor

Permyakova M. D.

• Siberian Institute of Plant Physiology and Biochemistry SB RAS, P.O. Box 317, 664033 Irkutsk, Russia

autor

Pshenichnikova T. A.

• Institute of Cytology and Genetics SB RAS, Lavrentiev Ave. 10, 630090 Novosibirsk, Russia

autor

Borner A.

• Leibniz Institute of Plant Genetics and Crop Plant Research, Corrensstrasse 3, 06466 Gatersleben, Germany

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