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为深入研究落叶松系统发育过程及育种工作,对落叶松不同种和日本落叶松不同家系叶片横切面构造及形状进行了研究。结果表明,它们的叶横切面构造,都是由表皮、叶肉的皱褶细胞、树脂道、机械组织、气孔和维管束组成。下皮细胞数目和分布层次不同、气孔带数和气孔数不同、叶片中段宽度和厚度不同、横切面形状也不同。从针叶下皮细胞分布看,我国长白落叶松和苏联远东分布的长白落叶松,在系统发育上不属同一阶段;日本落叶松和欧洲落叶松基本属于古老的系统发育类型。
In order to further study the development and breeding of larch system, the cross-section structure and shape of leaves of different species of Larch and Japanese Larch were studied. The results showed that their leaf cross-section structures consisted of epidermis, follicular cells of mesophyll, resinous pathways, mechanical tissues, stoma and vascular bundles. The number and distribution of subcutaneous epithelial cells were different, with different stomatal numbers and stomatal numbers. The width and thickness of middle leaves were different, and the cross-sectional shapes were also different. From the perspective of the distribution of coniferous epithelial cells, the Larix olgensis and the Larix olgensis distributed in the Soviet Union in the Far East are not in the same stage of phylogenetic distribution. The Japanese larch and European larch basically belong to the ancient phylogenetic types.