Effects of salt and water stress on the seed germination of Chenopodium glaucum L.
不同盐分与水分胁迫对灰绿藜种子萌发效应研究

The effects of different salts and water stresses on the seed germination of Chenopodium glaucum L. were studied. The results sh ow that th e seed germination percentage decreases significantly with salinity or os motic po tential increase when salt solution concentration is higher than 0 05 m ol/L or the osmotic potential of PEG solutions is lower than -0.2MPa.Germin ation of seed s treated by MgSO 4 is less affected and then the order is those by mixed salt, NaCl,Na 2CO 3, Na 2SO 4 and MgCl 2. In solutions with the osmotic potential of less tha n -0.5MPa,the seed germination percentage is lower in NaCl than that in is o osm otic PEG.After the non germinated seeds from all the treatments are transferred to distilled water, the finial germination percentage indicates that a certain d egrees of salt and water stress have no much effects on the seed germinati on pot ential ability.Basically the germination recovery percentage increases w ith an i ncrease of pre transfer salinity.The osmotic stress in wh ich seed germina tion ability is not hurtful varies with the kind of solutions.