Abstract
AbstractThe morphogenetic response of Hypericum perforatum seedlings to different auxin and cytokinin concentrations was studied. A stimulation of the concentration‐dependent rooting ability was observed under the influence of indole‐3‐acetic acid and indole‐3‐butyric acid. Rooting was not enhanced by the effects of 2,4‐dichlorophenoxyacetic acid and 1‐naphtaleneacetic acid. Differentiated roots were isolated and cultured in liquid media with the same combination of growth‐promoting auxins. Chromosome counts in root tip cells after long‐term cultivation indicated a high degree of chromosomal instability. Multiple shoot formation occurred under the influence of 6‐benzylaminopurine and kinetin. Adenine and 6‐(γ,γ‐dimethylallylamino)‐purine did not stimulate shoot differentiation. No differences in the morphogenetic response to auxins and cytokinis were detected between diploid and tetrapoloid plants.
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