中间偃麦草和长穗偃麦草解剖结构的扫描电镜观察

运用扫描电镜观察了中间偃麦草Elytrigia intermedia和长穗偃麦草E. elongata的根、茎、叶以及根茎的形态解剖结构，结果显示：2种植物的根形态均由表皮、皮层和中柱组成，表皮着生大量根毛，内皮层细胞壁5面加厚，在横切面上呈马蹄形；茎与根茎的维管束分内外两圈分布，中央有髓腔；叶片形态由表皮、叶肉和叶脉3部分构成，表皮细胞包括长细胞、附属物、气孔器细胞和泡状细胞。中间偃麦草和长穗偃麦草的叶片表皮微形态上存在显著差异，其中长穗偃麦草叶脉上分布3～4列乳突，而中间偃麦草叶脉上则分布3～4列刺毛，另外在根皮层细胞中发现了发达的类似通气组织的结构，产生原因亟待进一步研究。

SEM observation on anatomical structure of Elytrigia elongata and E. intermedia

The anatomical structure of root,stem,leaf and rhizome of Elytrigia elongata and E.intermedia was examined under the scanning electron microscope(SEM).The anatomical structure of root transverse section was consisted with epidermis,cortex and stele.The number of root hairs appeared in the epidermis,and the endodermis cell had 5 thickened walls and was the horseshoe-shaped in the transverse section.Two circles of vascular bundles and a central pith cavity showed in the stem and rhizome morphology.The leaf wa...