植物内源激素与不同基因型小麦抗寒性关系的研究

Study on Relations Between Plant Endogenous Hormones and Cold Resistance in Wheat

对 4个不同基因型小麦品种在越冬过程中植物内源激素的变化进行了测定。结果表明 ,冬性和春性基因型小麦表现出明显的差异。脱落酸水平在抗寒性较强的冬性品种中显著高于抗寒性弱的品种 ,赤霉素则在抗寒能力弱的春性品种中含量较高 ;抗寒性强的品种的生长素在冬前较高 ;春性品种中的细胞分裂素水平一直保持相对稳定。因此 ,可以认为上述 4种植物内源激素与不同基因型小麦的抗寒能力有关。此外 ,植物内源激素的活跃变化反应了小麦在越冬期间仍保持较强的生理代谢能力 。

The Changes of four plants'endogenous hormones were investigated during winter periods.The results showed the big difference between the genotypes of the winter wheat and spring wheat, the higher ABA contents in more resistant varieties,the higher GA 3 contents in spring wheat ;and the higher IAA contents in the genotypes with more resistant to coldness before winter,the more stable Z+ZR contents in the genotype of spring wheat.Thus it could be concluded that there were close relations between the four plants'endogenous hormones and cold resistance in wheat.In addition,the active changes of the endogenous hormones reflected effective metabolism,which did not stop with coldness.