玉兰油细胞的发育及其与器官结构发育的关系

利用石蜡切片法及半薄切片法对玉兰茎、叶、花和种子中油细胞的发育进行了研究，结果表明：在所研究的各器官中油细胞以相同的方式发生。油细胞原始细胞因其细胞质染色较深、细胞核大明显及液泡化程度低而易与周围组织细胞分辨，以后，原始细胞逐渐液泡化，最终形成一个中央大液泡，其细胞质及细胞核呈一薄层，当油细胞成熟时，其细胞质和细胞核解体，而大液泡充满整个油细胞腔，成为储油的囊，在一些油细胞中，可观察到怀形构造，但

STUDIES ON DEVELOPMENT OF OIL CELLS AND ITS RELATIONSHIP WITH DEVELOPMENT OF STRUCTURES OF MAGNOLIA DENUDATA DESR. ORGANS

The development of oil cells in stem, leaf, flower and seed of Magnolia denudata was studied with the methods of paraffine section and semithin section. The results indicate that oil cells initiate in the same pattern from all the organs examined. Oil cell initials are easily identified from the tissue arounded by their densely cytoplasm, bigger and apparent nucleus and low vacuolization. With the gradual vacuolization of the oil cell, a large vacuole is formed. After the oil cell reaches its fully maturity, the cytoplasm and the nucleus are disintegrated. So the whole volume of the oil cell is filled by the large vacuole, which becomes oil sac finially.In some oil cells,the cupule can be observed, but the occurance of lysis cavaties from oil cells raported by other authors is not found. In addition,the development steps of oil cells are not consistent with those of the structure of organs and they are distributed. Plate 1, Ref 10