About the Editors 1. Brassinosteroids -occurrence and chemical structures in plants Andrzej Bajguz 2. in plants M.-C. Codreanu and E. Russinova 29 3. Regulation of brassinosteroid metabolism L. Hategan, B. Godza and M. Szekeres 4. Brassinosteroid signaling in rice H. Nakagawa, A. Tanaka and M. Mori 5. Brassinosteroids and light -regulatory factors of growth and development of plants I.F. Golovatskaya 6. Brassinosteroids and photosynthesis D. Holá 7. Physiological effects related to brassinosteroid application in plants M.M.A. Gomes 8.