期刊
APPLIED BIOCHEMISTRY AND MICROBIOLOGY
卷 39, 期 5, 页码 524-531出版社
MAIK NAUKA/INTERPERIODICA
DOI: 10.1023/A:1025413122702
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Contents of chlorophylls, carotenoids, soluble leaf proteins, and the key enzyme of carbon metabolism-ribulose bisphosphate carboxylase/oxygenase (RuBisCO; EC 4.1.1.39)-in young seedlings and adult leaves of the wheat Triticum aestivum L. cultivars Mironovskaya 808 and Lyutescens 758, contrasting in their water stress tolerances, were compared under conditions of normal available water supply, water deficiency, and subsequent rehydration. It was discovered that compounds displaying a cytokinin activity (6-benzylaminopurine, thidiazuron, kartolin-2, and kartolin-4) reduced the decreases in contents of chlorophylls, carotenoids, soluble leaf proteins, and RuBisCO, progressing with development of water stress, as well as contributed to their more rapid recovery. These compounds with cytokinin activity also accelerated restoration of the compounds studied to their initial concentrations during rehydration. The kartolin preparations caused a maximal protective effect. Water stress had a more pronounced negative effect on the cultivar Lyutescens 758. Dehydration resulted in a more extensive destruction of seedlings compared to leaves of adult plants.
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