[Studies on the phytohormonal action of an extract prepared from Hippophäe rhamnoides seeds (VII)].

Trying to test by 2 standard tests. AVENA and COLEUS, the stimulating capacity both of rhizogenesis and organogenesis under the influence of various concentrate doses obtained from extract of H. R. seeds together with M/10, M\20 and M/200 dilutions of IAA (Indolil acetic acid) we could notice that the big concentrations of IAA and those of extract from H.R. lead to the tissues necrosis. The situation is different at to times diluted concentrations this being valid both for the sample and standard. The very small doses (corresponding to same M/200 dilutions) induce much too reduced effects for being macroscopically estimated. Based upon the results the authors believe that the extract prepared from 5 g of white sea buckthorn seeds corresponds to the intensity of action of 90 mg IAA but it is not entirely determined by the auxine existing in the seeds also by the potential of aminoacids found in a large quantity in this vegetable material.