Effects of drought stress simulated by PEG on seed germination of four desert plant species Germination Responses of Different Maturity Leymus chinensis Seeds to Salt Stress in Songnen Grassland Effects of NaCl stress on seed germination of four desert plant species Germination and Seeding Growth of Atriplex verrucifera Bieb.under NaCl Stress Response of seed germination of Rhododendron fortunei to drought stress