ON THE ROLE PLAYED BY SOME NATURAL-PRODUCTS, WITH AROMATIC STRUCTURE,IN PROCESSES OF PLANT-GROWING

Polyphenolic products extracted from beach oak and spruce bark wood, e ither unmodified or modified through oxidation, have been employed in experiments of bean and millet seed germination. The observation was m ade that the favourable action manifested by the isolated products dep ends on their nature, as well as on the modification had in view. Also , for each of the compounds tested, a maximum activity is recorded wit hin. a certain domain of concentration, evidencing a similar action to that of the plant growth hormones.