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为了研究冰草的抗旱性,试验以蒙古冰草、蒙农1号冰草为材料,用聚乙二醇6000(PEG6000)模拟土壤水分胁迫,对蒙古冰草、蒙农1号冰草的种子发芽及苗期的生理生化等抗旱性指标进行研究。结果表明:在PEG6000胁迫下,蒙古冰草、蒙农1号冰草种子的发芽率、发芽势、种子萌发胁迫指数明显下降;蒙农1号冰草种子在萌发阶段的抗旱性优于蒙古冰草;PEG6000模拟水分胁迫对蒙古冰草、蒙农1号冰草的根部进行渗透胁迫,使供试材料产生一系列生理反应,叶片相对含水量、叶绿素含量显著下降(P<0.05),游离脯氨酸、可溶性糖显著增加(P<0.05),丙二醛含量随着水分胁迫时间的延长和胁迫程度的增加而升高(P<0.05)。
In order to study the drought resistance of Agropyron crassipes, the experiment was carried out using the Agropyron crassipes and Mengnong 1 Agropyrongrass as materials, and the soil water stress was simulated by using PEG6000. Germination and seedling physiological and biochemical indicators such as drought resistance. The results showed that under the stress of PEG6000, the germination rate, germination energy and seed germination stress index of M. Under the simulated stress conditions of PEG6000, osmotic stress was applied to the roots of the Agropyron chinense and Mengnong 1, which caused a series of physiological responses to the tested materials. The relative water content and chlorophyll content were significantly decreased (P <0.05) (P <0.05). The content of malondialdehyde (MDA) increased with the prolongation of water stress and the degree of stress (P <0.05).