Abstract: Af ter being set at heat shock ( 38 ℃ ) , protein components of Pei'ai 64S seedlings show differences obviously compared with its protein components in condition of 22 ℃ . Between 97. 4 KD and 14. 4 KD, Pei'ai 64S produces 4 new bands and 2 bands weakens. Af ter treatment of heat shock ( 38 ℃) , Pei'ai 64S also shows changes of 7 bands compared with regular rice Xiangwanxian-2. The changes of protein components cause neces sarily changes of enzyme systems and affect the normal growth and development of seedlings and at last the growth and development of seedlings are obviously inhibited.

Key words: protein components thermo-sensitive genic male-sterile rice, seedlings, gel electrophoresis