title: Gibberellin- and cytokinin-like activities in marine algae from central Mediterranean.
abstract: The distribution of gibberellin- and cytokinin-like activities in twenty-one species of mediterranean algae belonging to Phaeophyta and Rhodophyta has been investigated. Fractions containing each of these activities have been obtained by partitioning aqueous-methanolic extracts of algae against ethyl acetate and butanol successively at different pH values. The stimulation or inhibition of amaranthin synthesis in Amaranthus sp. seedlings have been used a biological tests to assay the cytokinin- or gibberellin-like activities respectively. One or both these two hormonal activities have been detected in all species examined. While cytokinin-like activity has been found with the same frequency in the two phyla, the gibberellin-like activity was less frequent in Phaeophyta.
mesh_terms: D001681:Biological Assay; D003583:Cytokinins / Q000032:analysis*; D056890:Eukaryota / Q000032:analysis*; D005875:Gibberellins / Q000032:analysis*; D019684:Magnoliopsida / Q000187:drug effects; D000459:Phaeophyceae / Q000032:analysis; D010937:Plant Growth Regulators / Q000032:analysis*; D010944:Plants / Q000378:metabolism; D000461:Rhodophyta / Q000032:analysis
chemical_list: D003583:Cytokinins; D005875:Gibberellins; D010937:Plant Growth Regulators