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在气温下降到冰点以下的地方,越冬作物的植株首先必须在0～10℃温度下锻炼,以忍耐零度以下的低温。在最近发表的关于锻炼的理化特性的文章中所介绍资料和观点虽有很大的争论,但己经肯定碳水化合物、氨基酸、核酸、蛋白质和不饱和类脂物的变化,都与低温锻炼有关。从当前不饱和脂肪酸对植物温度反应方面所起的作用尚不明确,这就足以说明我们对锻炼过程基本上是缺乏了解的。Lyons等证实耐寒植物的品种,在其原始线粒体膜的类脂物中,增加了亚麻酸的含量。这种亚麻酸的增加,不存在于对冷害敏感的植物品种(?)等记录了苜蓿
When the temperature drops below freezing, the plants of a winter crop must first exercise at a temperature of 0 to 10 ° C to endure the subzero temperatures. Although much has been said about the data and opinions presented in the recently published article on physical and chemical properties of exercise, changes in carbohydrates, amino acids, nucleic acids, proteins, and unsaturated lipids have been identified as being associated with hypothermia . The role played by current unsaturated fatty acids in plant temperature response is not clear, which is enough to show that we are largely unaware of the exercise process. Lyons and others have demonstrated that cold-tolerant plant varieties have increased linolenic acid content in their original mitochondrial membrane lipids. This increased linolenic acid does not exist in the cold-sensitive plant varieties (?) Recorded alfalfa