| 独叶草形态学研究 II．根状茎的解剖 |
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| 引用本文： | 胡正海,李广民.独叶草形态学研究 II．根状茎的解剖[J].中国科学院研究生院学报,1979,17(2):23-29. |
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| 作者姓名： | 胡正海 李广民 |
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| 作者单位： | (西北大学生物系) |
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| 摘 要： | 本文为独叶草形态学研究的一部分，主要报道其根状茎结构的初步观察结果。根状茎的初
生结构的基本图案类似一般多年生草本植物的根状茎。但其维管束连接成简状，缺乏髓射线，
以后产生的次生维管组织中亦缺乏明显的射线。木质部的导管主要为梯纹加厚。梯纹导管的分
子的穿孔板呈水平的和不同程度的倾斜状的，水平的和一部分倾斜状的穿孔板上只具有单个
大穿孔，而另一些倾斜状的穿孔板上，呈一种复穿孔到单穿孔的过渡形式。参照Bailey(1956)
指出的管状分子的演化是不可逆的观点，联系到毛茛科植物一般具有单穿孔的导管，应属于一种原始的结构特征。独叶草的营养叶,鳞片叶和芽苞叶都具有单叶隙，前者具四个叶迹,后两
者都具有一个双重性的叶迹。参照前人的看法，联系独叶草的叶,花和导管分子中的一些原始性状推测，可能如Foster(1960，1961)曾指出的，在三叶隙和多叶隙占多数的毛莨科中，独叶草的单叶隙可能是一种原始的形态。
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Morphological studies of Kingdonia uniflora F. Balfour et W. W. Smith II. The anatomy of rhizome |
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| Hu Zheng-Hai,Lee Kong-Ming.Morphological studies of Kingdonia uniflora F. Balfour et W. W. Smith II. The anatomy of rhizome[J].Journal of the Graduate School of the Chinese Academy of Sciences,1979,17(2):23-29. |
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| Authors: | Hu Zheng-Hai Lee Kong-Ming |
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| Institution: | (Department of Biology, North-Westrn University) |
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| Abstract: | In the present paper, as a part of our morphological studies on Kingdonia, the
preliminary results of observations on the structure of its rhizome are included.
The fundamental pattern of the primary structures of the rhizome of Kingdonia
is simillar to that of most perennial herbaceous plants. However, a cylindrical stele
formed from the connecting vascular tissues is generally present. In the primary
tissue, or even in the secondary vascular tissue, no consipicious vascular ray is obser-
ved. Most vessel elements of the rhizome are with scalariform thickening. A single
large porferation is usually present on the horizontal plate, while on the oblique
plate several small pores are observable, besides a large one. This represents the
transformation from multiple porferation to singe porferation of the trachae being
indicated in the rhizome of Kingdonia. According to Bailey's veiwpoint,the evolu-
tion of the vessel element, is irreversible, so this phenomena occuring in the rhizome
of Kingdonia would indicate a primitive character.
The gap of the leaf members, including the foliago leaves, scale leaves and cata-
phylls is unilacunar. Four traces are indicated in the foliage leaves and a double
trace apears in both the scale leaves and catophylls. In Ranunculaceae, trilacunar
gaps and multilacunar gaps are generally occuring in most plants. According to the
viewpoint of previous author and based on the primitive, features of its leaf, flower
and vessel' elements, it is probably that the unilacunar gap of Kingdonia is a primi-
tive character as Foster A. S. (1960, 1961) had pointed out.
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