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江浙地区４个席草品种地上茎的表面都有纵行条纹，条纹的深浅、数量影响了茎表面的光洁度。基本组织厚度、纤维束、维管束的排列方式、大小、纤维细胞平均长度及它们单位体积内的数量在４个品种中的差异影响了席草４个品种茎秆的坚韧性。髓部细胞的特化、富含气体的海绵状组织的形成及基本组织内出现的腔隙道使席草茎秆具有较好的弹性和耐压力。
In Jiangsu and Zhejiang areas, the surface of stems of four seats grass varieties had longitudinal stripes and the depth of stripes, which affected the surface finish of stems. The differences of the four tissue types, such as thickness of basic tissue, arrangement of fiber bundles, arrangement of vascular bundles, size, average length of fibroblasts and their number per unit volume, affected the tenacity of four varieties of mat. The specialization of the myeloid cells, the formation of gas-rich spongy tissue and the presence of tunnels in the basal tissue give the mat grass a good elasticity and pressure resistance.