The analysis of brassinosteroids — plant growth-promoting substances
✍ Scribed by Nubuo Ikekawa
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 686 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0165-9936
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📜 SIMILAR VOLUMES
Five 5-hydroxy-6-ketone brassinosteroid analogs have been synthesized from stigmasterol (1) and their plant growth promoting activity has been evaluated using rice lamina inclination test. 3 has elicited high activity as plant growth regulator.
The new brassinosteroids (III), (IV), (VI), and (VII) are prepared via hydroxylation of the diene (II) or its C-5 epimer. (IV) shows strong plant growth promoting activity and is a good candidate for application in agriculture.
It was previously shown that a number of plant growth promoting rhizobacteria contain an enzyme, 1-aminocyclopropane-1-carboxylate deaminase, that catalyses the cleavage of 1-aminocyclopropane-1-carboxylate, the immediate precursor of ethylene in plants. Moreover, experimental evidence indicated tha