JANECZKO, A., BIESAGA-KOSCIELNIAK, J., OKLEŠŤKOVÁ, Jana, FILEK, M., DZIURKA, M., SZAREK-LUKASZEWSKA, G., KOSCIELNIAK, J. Role of 24-Epibrassinolide in Wheat Production: Physiological Effects and Uptake. Journal of Agronomy and Crop Science. 2010, 196(4), 311-321. ISSN 0931-2250. E-ISSN 1439-037X

Brassinosteroids are plant steroid hormones important for plant growth and development. They include more then 70 compounds. Their physiological effect and possibilities of practical use are still being investigated. In this study, we evaluated the effects of exogenously applied 24-epibrassinolide, one of the brassinosteroids, on the grain yield and grain chemical composition (carbohydrates, proteins, fats and minerals) of wheat. Moreover, we analysed the presence of brassinosteroids in newly formed wheat grains after exogenous plant treatment with 24-epibrassinolide. Experiments were performed in a vegetation hall (plants cultivated in pots) and in the field. The tested regulator was applied via 48 h seed soaking (1 mg center dot dm-3) or spraying plants at the heading stage (0.25 mg center dot dm-3). 24-epibrassinolide increased grain yield in plants growing in the field (by about 20 %), but not in plants cultivated in vegetation hall.