在春季气候温和时,林木种子在自然条件下多半落入融化的冰水和雪水中。这种现象在种子的长期系统发育过程中完全自然地重复了数千年,因而这些种子逐渐适应了雪水对它们的作用。雪水内对生物有害的重水含量救少,因而,雪水对胚乳和胚的作用不同于一般温水。在这种情况下,应把种子层积催芽时的低温,当作水的特殊性的因子来研究。这种雪水浸入种子细胞的原生质体后,可能 When the climate is mild in spring, forest seed mostly falls into melting ice and snow under natural conditions. This phenomenon is completely natural for thousands of years during the long-term phylogenetic development of the seed, so the seeds gradually adapt to the effects of snow on them. Snow water harmful to the biological heavy water content saved, therefore, the effect of snow on endosperm and embryo is different from the general warm water. In this case, the hypothermia at the time of seed germination should be considered as a factor of the particularity of water. After this kind of snow water is immersed in protoplasts of seed cells, it is possible