Abstract:

In order to compare the differences of organelles among winter wheat in the frigid region, three winter wheat cultivars with different overwintering survival rate were used as samples. The temperature variation in the period from late winter to early spring, was simulated by freezing-regrowth-freezing treatment in the laboratory. The results showed that the apical point in the sensitive cultivar suffered severe injury immediately in -3℃, one in the mediate cold hardy cultivar appeared freezing damage in -6℃, and the damage appeared in-9℃ in the most cold endurance cultivar.