Related Experiment Video
Updated: May 3, 2026

Quantification of Orofacial Phenotypes in Xenopus
Published on: November 6, 2014
[Morphoregulatory effects of xanthene derivatives]
1Institut für Phytopathologie der Universität Gießen, Gießen, Deutschland.
Abstract:
Of the compounds tested especially xanthene-9-carboxylic acid [I], applied via the roots (10(-4)M), strongly affected the morphogenesis of tomato plants. The leaves were deformed, the laminae reduced, the internodes shortened and the growth of axillary buds was stimulated. Geo- and phototropism of wheat and rye seedlings were disturbed. The observed effects are very similar to the influence of the structurally related derivatives of 9-hydroxyfluorenecarboxylic acid-(9) [II], known as "morphactins".
More Related Videos
Related Concept Videos
Direct-Acting Cholinergic Agonists: Pharmacological Actions
Cholinergic Antagonists: Pharmacological Actions
Gastrointestinal Effects: Antimuscarinics reduce gut contractions, increase gastric emptying, and slow intestinal transit. They partly inhibit gastric acid secretion...
Antiasthma Drugs: Methylxanthines
Theophylline is thought to inhibit phosphodiesterase enzymes, increasing intracellular levels of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). This rise in cAMP and cGMP concentrations stimulates cardiac function,...
Cholinergic Antagonists: Pharmacokinetics
Indirect-Acting Cholinergic Agonists: Pharmacokinetics
Reversible agents containing quaternary amines, such as neostigmine and edrophonium, are not easily absorbed orally because they...
Direct-Acting Cholinergic Agonists: Therapeutic Uses

