不同烟草品种叶下表皮微形态学特征的研究

A study on micromorphological characters of foliar epidermis of different tobacco varieties

利用扫描电镜及光学显微镜对烤烟、晒烟及野生烟共29个品种叶下表皮微形态学特征进行了观察,发现相同类型的烟草品种间表现出一些共同特征,但不同类型的烟草品种间其叶下表皮做形态学特征又存在一定的差异。烤烟气孔外拱盖内缘较丰富,晒烟次之,野生烟在所观察的品种中只有1种类型;烤烟气孔密度和长度的变幅比较大,晒烟则比较稳定;烤烟、晒烟细胞间多有突起,保卫细胞极区常见“T”型加厚,绝大多数有角质环边;而所观察的两个野生烟品种均无细胞间突起,无保卫细胞极区加厚,亦无角质环边。这些观察结果为烟草分类研究提供了有价值的参考依据。同时本文还探讨了烟草亲本与子代之间在叶下表皮做形态学特征上的关联性。

In the present paper,the characters on the abaxial foliar epidermis of 29 different varieties of to-bacco were observed under light and scanning electron microscopes. The results showed that abaxial foliar epidermis are different among tobacco varieties. It provides basis for taxonomy the varieties of tobacco. At same time,we also discuss the relationship of micromophological characters of tobacco foliar epidermis be-tween parent and generation.