Chemistry and Biology Research Institute, Agriculture Canada, Research Branch, Ottawa, Ontario Canada K1A OC6.
Plant Physiol. 1984 Nov;76(3):595-8. doi: 10.1104/pp.76.3.595.
A number of defined desiccation treatments without low temperature exposure were able to induce freezing tolerance in 20 cultivars of winter cereals. A maximal degree of freezing tolerance was induced in epicotyls at 24 degrees C in 24 hours at 40% relative humidity in rye and wheat, 7 days at 54% RH in barley, and 4 days at 70% RH in oats. Freezing tolerance was not correlated to water content of the plants after desiccation treatment but was related to the genetic capacity of the cultivars to frost harden. Levels of freezing tolerance induced by desiccation were similar to those induced by cold acclimation in rye and wheat, but considerably less in barley and oats. This is associated with a more rapid desiccation injury in barley and oats, precluding the completion of the hardening process.
许多未经过低温处理的干燥处理方法能够诱导 20 个冬小麦品种产生抗冻性。在黑麦和小麦中,将胚轴在 24 摄氏度、相对湿度 40%的条件下干燥 24 小时,在大麦中相对湿度 54%的条件下干燥 7 天,在燕麦中相对湿度 70%的条件下干燥 4 天,可以诱导出最大程度的抗冻性。抗冻性与干燥处理后植物的含水量无关,但与品种的抗寒能力有关。干燥处理诱导的抗冻性水平与黑麦和小麦的低温驯化诱导的抗冻性水平相似,但在大麦和燕麦中则要低得多。这与大麦和燕麦中更快的干燥损伤有关,从而阻止了硬化过程的完成。