东北桤木叶表皮盾状腺毛的形态及其变化过程

The Morphology and Process Changes of Peltate Glandular hairs in Alnus mandshurica Leaf Epidermis

利用电镜扫描技术，观察东北桤木叶片表面，发现其远轴面表皮上具有盾状腺毛。其由2个基细胞、4个柄细胞和20-25个头部细胞组成，随着分泌物质的积累，细胞逐渐破裂。幼叶远轴面表皮无盾状腺毛，仅有气孔分布。观察东北桤木叶片横切面，发现其为异面叶，远轴面表皮上的盾状腺毛细胞与叶脉维管组织相连。外文资料显示用于表述桤木属表皮上的盾状腺毛的名词较多，该毛状体应为“Peltate glandular hairs”。同时建议对“Glandular scales”、“Pehate gland”、“Pehate scale”、“Pehate glandular hairs”等名词进行规范统一。另外有关东北桤木叶表皮上毛状体从原表皮细胞的发生过程及其分泌物的成份，需进一步研究。

Using scanning electron microscopy techniques to observe the leaves surface of Alnus mandshurica and find it far axial epidermis with pehate glandular hairs. It made up of two-cells, four stem cells and 20 - 25 head-cells ,with the accumulation of secretion material, cells rupture, finally disappear. Theree is no peltate glandular hairs far axial epidermis, in young leawes only has stoma distribution. The cross section of A. mandshudca leaves showed it belongs to bifacial leaf, cells of far axial epidermis with pehate glandular hairs connect with leaf vein vascular tissue, the author consider this peltate glandular hairs shoule belong to ＂Peltate glandular hairs＂, and suggest that the nouns of ＂Glandular scales＂, ＂Peltate gland＂, ＂Peltate scale＂, ＂Peltate glandular hairs＂ should be normalized. The process of shields-glandular in A. mandshurica leaf epidermis and the component of secretion material need to be further studied.