Effects of salt and water stress on seed germination of Limonium

Seeds of L.gmelinii and L.otolepis were germinated 9 days at different temperature regimes in different concentration of NaCl solution and iso-osmotic PEG6000.According to the germination rate,germination potential,germination index and the germination recovery percentage of seeds that were incubated in NaCl and PEG6000 solutions for 9 days recovered after being transferred to distilled water.A conclusion could be drawn that a temperture regime of 15℃ at night and 25℃ in day time yielded optimal germination rate.Germination rate was the highest in the distilled water.The germination rate,germination potential and germination index increased along with the reducing of NaCl and iso-osmotic PEG6000 concentrations,which had inhibitory effect on the germination of seeds.The inhibitory level of PEG6000 was as much as that of iso-osmotic NaCl.