在亚热带自然生长的植物大多数不耐冻结,即使耐冻也只能在-3～-10℃范围内不受冻害。暖带性的大多数树种,不论是常绿阔叶树或是落叶树也只能耐-5～-17℃的冻结。温带落叶树比暖带性树种显著耐冻,能耐-20～-30℃的低温。这些温带性落叶树及暧带性树种的芽、韧皮组织、木质 Most plants naturally growing in the subtropical zone are not resistant to freezing, and even freeze-tolerant plants are not affected by frost damage only in the range of -3 to -10 ° C. Most of the warm tropical species, either evergreen broad-leaved trees or deciduous trees can only be resistant to -5 ~ -17 ℃ freezing. Temperate deciduous trees significantly warmer than the warm temperate species, resistant to -20 ~ -30 ℃ low temperature. These temperate deciduous trees and the bud of warm temperate tree species, phloem, woody