Study on Drought Resistance of Ten Herbaceous Plants under PEG-6000 Simulated Drought Stress

Authors Wang Yanan; Zhao Siming; Cao Bing

Journal Acta Agrestia Sinica , 2020,4:28

Abstract Using the method of PEG-6000to simulate drought stress,the germination rate and germination index and other indexes of ten herbaceous plant seeds growing in Ningxia coal base after preliminary investigation were measured to compare their drought resistance during germination.The results showed that different PEG concentrations treatments had different effects on seed germination of herbaceous plants.With the increase of PEG drought stress degree,the germination potential,germination rate,germination index,radicle length and radicle diameter of seeds decreased generally;Among them,PEG (5%)with low concentration had obvious promoting effects on the germination potential of Astragalus adsurgens Pall.the germination rate of Artemisia desertorum Spreng.Syst.Veg.,the radicle length of Glycyrrhiza uralensis Fisch.and the radicle diameter of Althaea rosea (Linn.)Cavan.Compared with the control,under the treatment with PEG concentration of 15%,the germination rate and germination potential of Medicago sativa L.,Althaea rosea (Linn.)Cavan.and Trifolium repens L.decreased greatly;When the PEG concentration was 20%,the germination rate and germination potential of Sophora alopecuroides L.,Medicago sativa L.,Suaedaglauca (Bunge)Bunge.,and Trifolium repens L.were greatly reduced. The method of membership function was used to evaluate the drought resistance of ten herbaceous plants in germination period,the order of drought resistance was Glycyrrhiza uralensis Fisch.>Melilotus suaveolens Ledeb. >Suaedaglauca (Bunge)Bunge.>Agriophyllum squarrosum (Linn.)Moq.>Medicago sativa L.>Sophora alopecuroides L.>Artemisia desertorum Spreng.Syst.Veg.>Astragalus adsurgens Pall.>Althaea rosea (Linn.) Cavan.>Trifolium repens L..

Species covered 白车轴草 Trifolium repens 紫苜蓿 Medicago sativa 苦豆子 Sophora alopecuroides 草木樨 Melilotus suaveolens 甘草 Glycyrrhiza uralensis 沙蓬 Agriophyllum squarrosum 沙蒿 Artemisia desertorum 蜀葵 Althaea rosea