Effects of PEG Stress and Recovery on Activities of Key Enzymes Involved in Proline Metabolism in Wheat Cultivars with Difference in Drought Tolerance Study on biophysical-chemical change of asparagus under PEG stress Effects of Spaceflight on Germination and Seedling Growth of Alfalfa Seeds under PEG Stress Structure Characteristics Associated with Salt Tolerance of Populus euphratica Physiological Resistance of Three Lolium perenne L.Varieties under PEG stress Effects of PEG Stress on the Drought Resistance of Six Turfgrass Varieties of Lolium perenne L. Response to PEG Stress and Drought-tolerance Identification of Zhejiang Photosensitive Japonica Rice Cultivars Relationship between Wheat Leaf Capacitance and Water Content under Water Stress Effects of PEG stress on physiological characteristics of Calligonum mongolicum in different geographical provenance Physiological responses to PEG stress of Reaumuria soongorica seedlings from different geographical origins Evaluation of the germination characteristics and drought resistance of green manure crops under PEG stress Physiological responses of Nitraria tangutorum from different geographic provenances under osmotic stress A study on the response and on the comparison of physiological and biochemicalindexes of four Lolium perenne varieties under PEG stress