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植物在自然秋季低温或人工低温下进行抗寒锻炼时,内源激素平衡发生相应变化,通常生长促进物质含量逐渐降低,而抑制物质增多。明显表现出赤霉素(GA)含量减少,游离 ABA 含量增加,二者含量的消长是抗寒性提高的重要因素之一。Larry 等发现,当气温从20℃下降至2℃时,ABA 含量增加1～2倍,曹仪植等测得玉米在0～5℃下生
Plants in the natural cold or artificial low-temperature cold-resistant exercise, the endogenous hormone balance corresponding changes, usually growth-promoting substances gradually decreased, while inhibiting substances increased. Obviously showed that the content of gibberellin (GA) decreased and the content of free ABA increased. The increase and decrease of both contents was one of the important factors to improve the cold resistance. Larry et al. Found that the ABA content increased 1-2 times when the temperature dropped from 20 ° C to 2 ° C. The measured corn concentration at 0-5 ° C