Abstract: Seeds of winter wheat var. 4185 were soaked in water solution of KT (0,5,20,50, 100 mg/kg), GA₃ (0,5,20,80 mg/kg) and ZEN (0,2,6,18 mg/kg) for 18 h at 25℃.After being washed with distilled water, the soaked seeds were put on moist vermiculite media to be vernalized for 0-20 d at 10℃ under continuous inflorescent light of 1500 lx. Vernalized seedlings were divided into two parts and then cultivated in and outside a greenhouse respectively. The tillering rate, heading date and total number of leaves on the main stem were recorded. Results showed that KT could not only raise the heading rate of enough vernalized plants but also replace partial cold treatment to make the unenough vernalized plants pass vernalization period. Under certain environmental condition, GA₃ and ZEN could also raise the heading rate of plants. Interactions among the three hormones were similarly influenced by environmental conditions in and outside the greenhouse and the number of days for vernalization.

Key words: Triticum aestivum L, Phytohormones, Vernalization, Heading

CLC Number: 

• S512.101