红树植物导管数量多、管孔小、机械组织为韧型纤维，薄壁组织次生加厚明显是适应环境的特征。
Many vessel numbers, small pore, libriform fibres (mechanical tissue)and obvious secondary thickening of xylem tissue are the features of adaptation to the environment.
导管与纤维管胞均具明显的螺纹加厚。
Vessel and fibre - tracheid are both spiral thickening distinctly.
研究棉株生理年龄对棉纤维加厚发育及纤维比强度形成的影响。
Effects of physiological age of cotton plant on the physiological mechanism of fiber thickening development and fiber strength were studied.
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