高羊茅越冬期叶片不同部位生理生化特性研究

Study on physiological and biochemical characteristics at different leaf positions in Festuca arundinacea during the over-wintering period

以高羊茅品种凌志(Fesuca elata cv.Barlexas)为材料,研究了叶片不同部位在整个越冬期间生理生化特性的变化。结果显示:叶片不同部位生理指标差异显著,叶片上部叶绿素含量、可溶性蛋白、抗坏血酸、全氮和全钾含量以及抗氧化系统保护酶显著低于中部和下部,而谷胱甘肽和丙二醛含量显著高于其他2个部位。高羊茅在越冬过程中,叶片各部位可溶性蛋白、全氮、全钾变化较平缓,而叶绿素和全磷先下降后期又有所回升,超氧化物歧化酶和过氧化物酶活性以及丙二醛含量则呈先上升再下降趋势。

Festuca arundinacea cv.Barlexas was used to study the physiological and biochemical characteristics of different positions of leaf during over-wintering stage.The results showed that the contents of chlorophyll,soluble protein,AsA,total N and K,and activity of anti-oxidative enzyme in upper part of leaf were significantly lower than other parts,but the contents of GSH and MDA were higher.During the over-wintering stage,soluble protein,total N and K contents in different leaf positions had no obvious variation,while the chlorophyll and total P contents decreased at the beginning and then increased.However,the activities of SOD and POD and content of MDA showed an opposite pattern.