Effects of salt and water stress on the seed germination of Chenopodium glaucum L.

The effects of different salts and water stresses on the seed germination of Chenopodium laucum L. were studied. The results show that the seed germinatiｏn percentage decreases significantly with salinity or omotic potential increase when salt solution concentration is higher than 0.05 mol/L or the omotic potential of PEG sｏllutiｏns is lｏwer than -0.2MPa.Germination of seeds treated by MgSO₄ is less affected and then the order is those by mixed salt, NaCl, Na₂CO₃,　Na₂SO₄ and MgCl₂. In solutions with the osmoic potential of less than -0.5MPa,the seed gemination percentage is lower in NaCl than that in iso-osmotic PEG.After the non-germinated seeds from all the treatments are transferred to distilled water, the finial germination percentage indicates that a certain degrees of salt and water stress have no much effects on the seed germination pｏtential ability.Basically the germination recovery percentage increases with an increase oｏf pre-transfer salinity.The osmotic stress in which seed germination ability is not hurtful varies with the kind of solutions.