Phaseolus vulgaris has a great variability regarding the tolerance to saline stress, starting with values of 40-46 mM NaCl and up to 196-207 mM NaCl. The experimental results achieved made evident the existence of some bean genotypes with a good tolerance to salinity during germination (Ohaba Forgaci I, Ohaba Forgaci II and Berini). These genotypes have recorded during germination normal intensities of radicle growth and cotyledon development, and they have synthesized important amounts of free proline with osmoprotector role. We have also determined the dynamics of the dry matter percent during germination and within the post-germination phases. The increase of the dry matter percent in the sensitive genotypes is due to their incapacity of hydration and water maintenance.

Phaseolus vulgaris; salt stress tolerance; free proline; seed germination; dry matter; osmoprotection

Presentation: oral