摘要： 冬小麦幼苗经不同温度和时间处理后，对胚根、胚芽中过氧化物同工酶有较明显影响。在常温（25℃）下，随处理时间的延长，POD同工酶谱带数增加，不依品种、取材部位而异；在较高温度（30℃）下，则呈曲线式变化，即随处理时间的延长谱带数增加，到一定时间以后又减少，高峰值与品种特性、取材部位有关；在高温（40℃、50℃）下，谱带数呈减少趋势，处理一定时间以后锐减。不同品种耐高温的能力差异很大。

关键词: 过氧化物同工酶, 冬小麦, 幼苗, 温度, 胚根, 胚芽

Abstract: The POD isozymes in radicle and plumule of two winter wheat seedlings (Zhongyin-15and 81-1 )were significantly affected after treatment by different temperatures(25℃, 30℃,40 ℃,50℃)and times (2, 4, 8, 16, 24, 48 hours), Its bands increased when treatment time prolonged at normal temperature(25℃).At 30℃, POD isozymes showed curve changes.The bands increased with the lengthening of the treatment time,but the bands decreased after reaching at a definite time.The peak value is related to the characteristics of variety and sampling position.The tendency of bands decreased at high temperature (40℃, 50℃), and decreased sharply after a period of treatment.The ability of high temperature tolerance is varited significantly among winter wheat varieties.

Key words: Peroxidase (POD) isozyme, Winter wheat, High temperature-tolerance, Treatment time

中图分类号: 

• S512.101