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采用石蜡切片技术和光学显微技术,对生长在土壤中和水生环境中红豆杉根进行形态与解剖结构比较研究。结果表明,水培红豆杉经诱导后生出了大量不定根组成的新根系。新生气生根外观稍细,表皮排列较紧密,具有较为明显的角质层,表面密被细长的根毛;水生根外观稍粗,表皮细胞角质层不清楚,根毛较稀疏且短。水生根的皮层细胞层次较气生根略多。气生根与水生根中央的维管柱,初生木质部与初生韧皮部束数与土生根类似,均为2束,但细胞组成较少,结构明显简单。水培红豆杉的根次生生长发生较迟,次生生长与次生结构均较弱,表皮脱落被一两层周皮所代替,而皮层保留时间较长。
Paraffin sections and optical microscopy were used to study the morphology and anatomy of Taxus root in soil and aquatic environment. The results showed that a large number of new root system composed of adventitious roots was produced after inducing by Taxus chinensis. Freshly rooted roots slightly thinner, the epidermis arranged more closely, with a more pronounced stratum corneum, surface dense slender root hair; Aquatic root appearance a little thick, epidermal cells stratum corneum is unclear, root hair more sparse and short. Aquatic roots of cortical cells than the slightly higher levels of air. The number of vascular bundles in aerial root and aquatic root was similar to that of primary root xylem and primary phloem, both of them were two bundles, but the cell composition was less and the structure was obviously simple. The secondary root growth of Taxus chinensis appeared later, the secondary growth and secondary structure were weaker, the epidermis was replaced by one or two layers of periderm, while the cortex retained for a longer time.