牛磺酸对小麦幼苗生长的生理效应

采用牛磺酸溶液培育小麦幼苗,测定10、100、500、1 000、5 000 mg/L的牛磺酸对小麦幼苗的光合作用PS Ⅱ光化学效率、细胞膜相对透性和膜脂过氧化以及生长的影响.结果表明,与对照组相比,适宜浓度的牛磺酸处理可促进小麦幼苗的生长,使其根长、株高、单株幼苗的干重和鲜重增加,并在一定程度上提高叶片的光化学效率,降低细胞膜相对透性和膜脂过氧化产物的含量;最适处理浓度约为500 mg/L.说明牛磺酸对小麦幼苗细胞膜有一定的保护作用.

Physiological Effects of Taurine on the Growth of Wheat (Triticum aestivum L.) Seedlings

Wheat (Triticum aestivum L.) seedlings were grown in taurine solution at concentrations of 10, 100, 500, 1000 and 5000 mg/L,and the photochemistry efficiency, the relative permeability of membrane, membrane lipid peroxidation and the growth indexes in wheat seedlings were determined. The results showed that taurine treatments distinctly promoted the growth of wheat seedlings and increased root length, plant height, dry weight and fresh weight single plant of wheat seedlings (Fig.1). In addition, the photochemistry efficiency in the leaf was also increase (Fig.2), and the membrane relative permeability and the content of membrane lipid peroxidation product MDA were decreased(Table 1 and Fig.3), with an optimum treatment concentration at about 500 mg/L. It suggests that taurine has protective effects on the cell membrane of wheat seedlings to the certain extent.