地热水对小麦种子萌发及生长的影响

Effect of Hot Spring Water on Seed Germination and Seedling Growth of Wheat

摘要: 为探讨地热水处理对小麦萌发和生长的影响，以济麦22为材料，用不同稀释浓度地热水(1/4，1/3，1/2稀释及完全地热水)处理小麦种子及幼苗，测定了小麦种子的发芽率、发芽势、发芽指数、根长、芽长及小麦幼苗的丙二醛(MDA)含量、超氧化物歧化酶(SOD)及过氧化物酶(POD)活性。结果表明，一定低浓度的地热水可以促进小麦种子萌发及萌发期小麦幼苗的根长、芽长，高浓度地热水处理则抑制小麦种子萌发和幼苗生长，但对小麦苗期的生长影响不明显。随着地热水处理浓度的升高，小麦叶片中的MDA含量表现为升高趋势，同时SOD及POD活性升高。总之，影响小麦的萌发和幼苗生长的地热水浓度不同，较低浓度的地热水即可影响小麦种子萌发。

Abstract: For studying the effect of hot spring water on wheat germination and wheat seedlings growth, “Jimai 22”, was used. Four hot spring water treatments were set to investigate the effects of dif-ferent concentrations of hot spring water on seed germination and seedling growth of wheat. Seeds germination percentage, germination energy, germination index, root length, stem length, antioxidative enzymes namely peroxidase (POD), superoxide dismutase (SOD), and parameters of oxidative stress malondialdehyde (MDA) contents in wheat seedlings were measured. The results indicated that low concentration of hot spring water had activation effect on seed germination, root length and stem length during seed germination, while the effect on wheat seedling growth was not obvious. Low concentration of hot spring water caused notable changes on MDA, POD and SOD in wheat seedlings, while the activities of POD and SOD increased obviously under the highest concentration. The hot spring water concentration which influenced the germination and seedling growth of wheat was different, and the low concentration of hot spring water could affect the germination of wheat seeds.