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基本説明
Chapters deal with the chemical structures, occurrence, synthesis, perception, signal transduction and practical applicability of the brassinosteroids and their analogs.
Full Description
The entire range of the developmental processes in plants is regulated by the shift in the hormonal concentration, tissue sensitivity and their interaction with the factors operating around the plants. Out of the recognized hormones, attention has largely been focused on five (Auxins, Gibberellins, Cytokinin, Abscisic acid and Ethylene). However, in this book, the information about the most recent group of phytohormones (Brassinosteroids) has been compiled by us. It is a class of over 40 polyhydroxylated sterol derivatives, ubiquitously distributed throughout the plant kingdom. A large portion of these steroids is restricted to the reproductive organs (pollens and immature seeds). Moreover, their strong growth-inducing capacity, recognized as early as prior to their identification in 1979, tempted the scientists to visualize the practical importance of this group of phytohormones. The brassin solution, from rape pollen, was used in a collaborative project by the scientists of Brazil and U. S. A. in a p- sowing seed treatment to augment the yield. This was followed by large-scale scientific programmes in U. S. , Japan, China, Germany and erstwhile U. S. S. R. , after the isolation of the brassinosteroids. This approach suits best in today's context where plants are targeted only as producers and hormones are employed to get desired results. Chapter 1 of this book (which embodies a total of 10 chapters), gives a comprehensive survey of the hitherto known brassinosteroids, isolated from lower and higher plants.
Contents
1. The chemical structures and occurrence of brassinosteroids in plants.- 2. Selected physiological responses of brassinosteroids: A historical approach.- 3. Recent progress in brassinosteroid research: Hormone perception and signal transduction.- 4. Synthesis and practical applications of brassinosteroid analogs.- 5. Brassinosteroids promote seed germination.- 6. Brassinosteroid-driven modulation of stem elongation and apical dominance: Applications in micropropagation.- 7. Studies on physiological action and application of 24-epibrassinolide in agriculture.- 8. Brassinosteroids and brassinosteroid analogues inclusion complexes in cyclodextrins.- 9. New practical aspects of brassinosteroids and results of their ten-year agricultural use in Russia and Belarus.- 10. Brassinosteroids: A regulator of 21st century.
