RESEARCHES ON THE PHYSIOLOGICAL ACTION OF SOME POLYPHENOLIC AND LIGNINIC PRODUCTS UPON PLANT-GROWTH

Polyphenolic compounds extracted from spruce mood bark, as well as amm onia lignosulfonates resulted from spruce mood delignification, have b een modified through oxidation reactions with hydrogen peroxide. Both unmodified and modified products have been tested as to their physiolo gical action upon bean seed germination, as well as upon greenhouse an d field Vicia faba hibrida cultures. The results obtained have evidenc ed a favourable action of the tested products both on germination and on the subsequent stages of plant growth, the activity recorded depend ing on the nature of compound, and on the modification had in view, as well.