烟叶烘烤过程中叶片组织结构变化的研究

利用树脂包埋、半薄切片法对烘烤调制过程中烟叶组织结构的连续变化作了一定的研究，结果如下：（1）随着烘烤过程的进行，烟叶的栅栏组织、海绵组织逐渐收缩变薄，而上下表皮厚度变化细微，维管束的结构变化较为迟缓。（2）至干筋初期，栅栏组织、海绵组织和上下表皮的细胞均已破裂瓦解，内部结构混为一体。细脉中的维管束也开始破裂溶解，支脉和主脉的维管束结构还基本保持完整状态。

Studies on the Variations of Leaf Tissue Structure in Flue-curing Process of Flue-cured Tobacco

The variations of tobacco leaf tissue structure in the flue-curing proccess were studied by using resin embedding and semicutting section. The main results were as follows: (1)The palisade tissue and spongy tissue of tabcco leaf gradually shrinked and turned thin as flue-curing was going on,but the thickness of the upper-episperm and lower-episperm changed only a litte and the vasscular bundle changed slowy ; (2)At the beginning of vein-dryed,the cells of palisade tissue,spongy tissue and epidermis,had broken and collapsed,and their interior material had been mixed,and the vascular bundles of veinlet began to burst and dis-solve too,but the vascular structure of lateral veins and midribs did not change.