IMPACT DE L’ACIDE SALICYLIQUE ET DES SELS SOULUBLES SUR LA GERMINATION ET LA CROISSANCES DES PLANTULES DES VICIA FABA ET PISUM SATIVUM

Abstract

This study initially investigated seed germination under increasing concentrations of soluble salts NaCl, CaCl2, and Na2SO4 (50, 100, and 200 mM) and salicylic acid (0.25, 0.5, 0.75, 1, and 1.5 mM). A second trial examined the growth of young seedlings of two legume varieties: broad bean and pea. The results show that germination is affected by NaCl at a concentration of 200 mM. The application of salicylic acid at 1.5 mM completely inhibited seed germination. Low doses of NaCl, Na2SO4, and CaCl2, combined with 0.25 and 0.5 mM salicylic acid, significantly stimulated germination rates in broad bean. Salicylic acid appears to severely affect pea germination; no germination was observed throughout the experiment. Germination was rapid at low concentrations of salt and salicylic acid. Regarding the effect of salicylic acid on the growth of young broad bean and pea seedlings, the results show that stem length, root length, and the number of roots decrease with increasing salicylic acid doses. Stem and root length decrease with increasing doses of NaCl and salicylic acid; however, for a treatment of 1.5 mM salicylic acid and salt concentrations of 50, 100, and 200mM, the broad bean variety exhibited no root growth. It appears that the effect of the measured germination and growth parameters is, overall, proportional to the concentrations of the salts and salicylic acid.