摘要
选取了11种豆科木本植物,比较了它们的根部外部形态和解剖结构特点,分析这些特点与结瘤的关系。结果表明,结瘤豆科植物的根系松软,颜色较浅,为白色或土黄色;不能结瘤的植物根系坚硬,颜色较深,为黑色或深褐色。石蜡切片观察,结瘤豆科植物和非结瘤豆科植物在根的表皮部分存在着明显差异,而在皮层和中柱部分差异不明显。非结瘤豆科植物的表皮细胞排列致密且整齐;而结瘤豆科植物表皮细胞较薄,切片时容易收缩破损。非结瘤豆科植物的根表皮细胞外切向壁的厚度比结瘤豆科植物的要厚,颜色也较深。豆科植物的表皮细胞外切向壁厚度似乎能够反映豆科植物从不结瘤到结瘤的进化过程。
Eleven wood legume plants were selected and their morphologic and anatomical characteristics were compared in order to analysis the relationship between the root structure and their nodulation, The results indicated that the roots of nodules legume plants are soft and tint in color, whereas the roots of no-nodules legume plants are firm and fuscous, Comparing their root anatomic structure with paraffin slice, the evidence difference existed in the parts of epidermis, but no difference in the cortex and stele, The epidemic cells of no-nodules legume plants arrange compact and orderliness, however, the cells of nodules legume plants are thin and destroyed easily when slice, The outer tangential wall of no-nodules legume plants epidermal cells is thicker and darker than that of nodule legume plants, It may reflect an evolutionary process from no-nodules legume plants to nodules legume plants.
出处
《林业科技开发》
2006年第4期20-23,共4页
China Forestry Science and Technology
基金
国家自然科学基金资助项目"非结瘤豆科树种不结瘤原因的研究"(30170765)
