驼绒藜、绢蒿、冰草抗旱性研究

Study on Drought Resistance of Ceratoides,Seriphidium and Agropyron

本文对3种植物抗旱性进行综合评比,为抗逆牧草选育和生态环境恢复提供理论依据。以野生驼绒藜、绢蒿和冰草等3种植物为试验对象,采用盆栽控水测定幼苗叶片相对含水量、可溶性糖、叶绿素、游离脯氨酸、丙二醛含量及超氧化物歧化酶、过氧化物酶、过氧化氢酶活性和相对电导率等9项生理生化指标,并综合评比其抗旱性能。结果表明,随着干旱胁迫时间的延长,3种植物幼苗叶片相对含水量、叶绿素含量均呈下降趋势,而其余指标均呈上升趋势,复水后均有不同程度恢复。对其植物抗旱隶属函数值进行计算,其抗旱排序为伊犁野生心叶驼绒藜>伊犁野生绢蒿>新疆野生冰草。

The comprehensive evaluations of drought resistance of three plants were made for providing the theoretical basis of breeding for stress resistance of forage and ecological environment restoration. In this paper, 3 kinds of plant （Ceratoodes,Seriphidium and Agropyron） were used as tested materials, their physiological parameters in seedlings under water stress for 18 days were determined, and the drought resistances of 3 plants were evaluated by subordination function. The results showed that the relative water contents and chlorohpyl contents of their leaves decreesed as days passed, and the other physiological parameters, such as soluble sugar, MDA, SOD, POD and CAT activity, increased obviously. However, all physiological parameters were recovered at 6 days as watex recovered in some extent. The results of subor- dination function method of drought resistance for Ceratoides, Seriphidium and Ag,ropyron for water stress showed their resistance ability as fol- lowing： Ceratoides 〉 Seriphidium 〉 Agropyron.