Photosynthetica 1998, 35(4):603-610 | DOI: 10.1023/A:1006943326928

The Activity and Content of Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase in Wheat Plants as Affected by Water Stress and Kartolin-4

I.I. Chernyad'ev1, O.F. Monakhova2
1 Bakh Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia
2 Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Moscow, Russia

The carboxylating activity and content of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPCO, EC 4.1.1.39), and other soluble proteins in young seedlings and mature leaves of Lutescens-758, a drought-sensitive cultivar of soft spring wheat Triticum aestivum L., were studied under the conditions of drought and subsequent rehydration. Seedlings and mature plants preliminarily treated with the cytokinin-like compound kartolin-4 were compared to untreated plants. Drought-induced decrease in RuBPCO activity should be attributed not only to proteolytic decomposition of the enzyme protein itself but also to a partial inhibition of its catalytic activity. The decrease in RuBPCO activity was larger than that in RuBPCO content. Water stress induced a marked decrease in the soluble protein content. Kartolin-4 increased the resistance to drought.

Additional key words: cytokinin; drought; proteins; Triticum aestivum

Prepublished online: December 1, 1998; Published: January 1, 1998  Show citation

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Chernyad'ev, I.I., & Monakhova, O.F. (1998). The Activity and Content of Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase in Wheat Plants as Affected by Water Stress and Kartolin-4. Photosynthetica, 35(4), 603-610. doi: 10.1023/A:1006943326928
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