单芽狗脊营养器官的解剖学研究
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国家科技支撑计划(2015BAD04B02)


Anatomical Study on Vegetative Organs of Woodwardia unigemmata
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    摘要:

    采用离析法和石蜡切片法对单芽狗脊营养器官进行形态解剖研究。结果表明:单芽狗脊叶为异面叶,上、下表皮细胞均为不规则型,仅下表皮有气孔器分布;叶柄维管束有2~6个,自叶柄基部向上至叶轴仅有2个较大的维管束;根状茎薄壁细胞之间有多个维管束散生分布,且富含丰富的淀粉粒;皮层在根的横切结构中占比较大,木质部的发育方式为外始式;单芽狗脊珠芽的发育过程分为三个阶段,珠芽原基的形成期、珠芽原基的分化期、成熟期。

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    The morphological anatomy of the vegetative organs of the Woodwardia unigemmata was studied by the method of segregation and paraffin sectioning. It indicated that: W. unigemmata leaves were heterologous leaves. The upper and lower epidermis cells were irregular, and only the lower epidermis had stomatal distribution. There are 2 to 6 vascular bundles in petiole, only 2 larger vascular bundles from petiole base up to leaf axis. Rhizome have multiple vascular bundles scattered among the parenchyma cells, and rich starch grains in parenchyma cells. Cortex takes up a large proportion in the transverse structure of roots, and xylem develops in an exogenous manner. The development process of W. unigemmata bulbil can be divided into three stages: the formation stage of bulbil primordium, the differentiation stage and the maturation stage of bulbil primordium.

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叶红环,廖海民,苟光前,等.单芽狗脊营养器官的解剖学研究[J].西北植物学报,2019,39(7):1154-1162

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  • 在线发布日期: 2019-09-05
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