Changes in Endogenous Gibberellin-like Substances in the Vegetative Shoot and Inflorescences in Solanum sisymbrifolium Lam. in Relation to Potassium Content of the Plant

Several acidic gibberellin-like substances were detected inmethanolic extracts from the vegetative shoot and inflorescencesof S. sisymbrifolium by thin layer chromatography and two bioassays.Plants with a relatively low but not a deficient content ofpotassium were shown to contain higher levels of the GA-likesubstances in both tissues than those having a higher K content.Also qualitative changes in the spectrum of the biologicallyactive substances are affected by varying the K content of theplant. The changes in the GA-like substances are found to correlatewith the previously reported morphogenetic effects induced byvarying the K content.