鹅掌楸属种间F_1杂种与亲本的叶下表皮微形态研究

A STUDY ON LEAF ABAXIAL EPIDERMIS MICROMORPHOLOGY OF INTERSPECIFIC F 1 HYBRID AND PARENTS IN LIRIODENDRON GENUS

鹅掌楸属种间正、反交Ｆ１杂种及双亲的扫描电镜（ＳＭＥ）观察表明：马褂木和反交Ｆ１的下表皮细胞具明显乳突，北美鹅掌楸和正交Ｆ１则呈现平坦状；北美鹅掌楸和正交Ｆ１下表皮气孔密度显著高于马褂木与反交Ｆ１；杂种与双亲的下表皮蜡质纹饰和气孔器形态没有表现出明显差异；正、反交Ｆ１的气孔开口明显大于双亲。

The leaf abaxial epidermis micromorphologic characters of Liriodendron reciprocal cross hybrids and parents were observed under scanning electron microscope (SME). The results are as follows: Liriodendron chinense (Hemsl.) Sarg. and minus crossing F 1 have obviously papillar cell in abaxial epidermis, that of L. tulipifera Linn. and plus crossing F 1 is flat. Stomatal density of L. tulipifera Linn. and plus crossing F 1 are much denser than that of L. chinense (Hemsl.) Sarg. and minus crossing F 1. There are no significant differences in abaxial epidermal waxy ornamentation and stomatal apparatus form between hybrids and parents. Reciprocal cross hybrids have larger stomatal apparatus opening than parents′.