低温胁迫对粳型巨胚稻西巨胚一号种子萌发的影响

摘要

本文以粳型西巨胚1号为试验材料，研究了不同低温处理对种子萌发的影响。结果表明，随着低温胁迫温度的降低，巨胚稻种子萌发受抑制的程度增强。当胁迫温度达8℃及以下时，西巨胚1号的发芽率急剧下降，低温处理后幼芽不能很好恢复生长，死苗率高。50%死苗率和胁迫温度的拟合曲线结果表明粳型西巨胚1号种子萌发对低温冷害的最低耐受温度为9.4℃。%The effect of different low temperature stress on seed germination was studied with the Japonica Xi-giant embryo-1 rice. The result showed that the restrained degree of seed germination increased with the decrease of temperature in the low temperature stress. when the low temperature is reached 8℃and below, the seed germination rate of Japonica Xi-giant embryo-1 rice was decreased rapidly, and the seedling disease rate was enhanced because it was not restored after low temperature stress treatment. The curves of 50%seedling disease rate and temperature stress indicated that the tolerance temperature of low temperature stress was 9.4℃ to seed germination of Japonica Xi-giant embryo-1 rice.