蓖麻秆木质部的显微构造
首发时间:2010-02-25
摘要:蓖麻秆初生木质部以导管为主,其纹孔形式呈现由环纹导管、螺纹导管、梯纹导管,最后到孔纹导管的变化。次生木质部总体上类似于阔叶材中的散孔材,异Ⅰ型射线,轴向薄壁组织为稀疏傍管型和星散型,其纤维细胞观察到角隅加厚现象。这一现象将使得蓖麻秆具有比其同密度材料更好的力学强度;此外角隅加厚将造成解离测得的纤维细胞的壁厚偏厚,导致纤维的壁腔比增加,使得蓖麻纤维的评价产生偏差。
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The Microstructure Of The Xylem Of Ricinus Communis L.(castor) Stalks
Abstract:The primary xylem of the Ricinus Communis L.(castor) Stalks is primarily constructed by the vessels, they change from annular vessels to spiral vessels, scalariform vessels, finally reticulated vessels. Generally speaking , the secondary xylem is similar to wood diffuse-porous; rays with multiseriate portion(s) as wide as uniseriate portions, all ray cells upright and /or square; axial parenchyma diffuse and axial parenchyma scanty paratracheal; angular thickening is observed in the fibers. This phenomenon makes the castor stalks has better strength compared to the materials with the same density. Besides, the angular thickening will cause the positive bias in measuring the thickness of the fiber cells, which will cause the wrong evaluation to fibers.
Keywords: castor stalks microstructure angular thickening
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No.4024551667812671****
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