title: Plant steroid hormones.
abstract: After a brief survey of the literature on the recently discovered brassinolide, some of our results with corticosteroids are given. A number of structural requirements of corticosteroids were deduced in a bioassay involving elongation growth and lateral root formation. To explain the activity of glucocorticoids, the involvement of a receptor protein is suggested as well as an enhanced RNA synthesis. However, the structural requirements found are not applicable to experiments on adventitious root formation, implying a different mode of action of corticosteroids in this test system.
mesh_terms: D000305:Adrenal Cortex Hormones / Q000494:pharmacology*; D001681:Biological Assay; D060406:Brassinosteroids; D002777:Cholestanols / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D007887:Fabaceae; D006854:Hydrocortisone / Q000378:metabolism / Q000494:pharmacology; D063245:Plant Development; D010937:Plant Growth Regulators / Q000494:pharmacology*; D010946:Plants, Medicinal; D012313:RNA / Q000096:biosynthesis; D013260:Steroids, Heterocyclic / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D000305:Adrenal Cortex Hormones; D060406:Brassinosteroids; D002777:Cholestanols; D010937:Plant Growth Regulators; D013260:Steroids, Heterocyclic; D012313:RNA; D006854:Hydrocortisone; C023623:brassinolide