普通野生稻(Oryza sativa L.f.spoalanca)和栽培稻(O.sativa L.)叶片的成熟叶绿体性状基本结构相似。普通野生稻叶片叶绿体体积较小,基粒数和基粒片层数少,基质密度低,但基质片层数较多,具有较多嗜锇体颗粒。栽培籼稻叶片成熟叶绿体积累大量的淀粉,且在叶绿体旁伴随着结构发育良好的线粒体和过氧化物体。普通野生稻直立类型具有类似的特征,而匍伏类型没有。这些现象说明栽培稻是由普通野生稻演变而来,也说明栽培籼稻与一年生直立类型野生稻有较密切的关系。
The basic structure of mature chloroplasts of leaves of the wild rice (Oryza sativa L. f. spontanca) was found to be similar to that of cultivated rice Oryza saliva L. ). The chloroplasts of cultivated rice had more grana, more grana lamellae and showed greater electron density of the cytoplasm than those of the wild rice species.The chloroplasts of wild rice had more stroma lamellae and more osmiophilic bodies than those of the cultivated rice.The chloroplasts of cultivated rice which contained a number of starch granules were adjacent to mitochondria and peroxisomes. Starch granules were observed in the chloroplast of annual wild rice, but not in the perennial wild rice. These results support the theory that the rice line of Southern China might have originated from O. sativa L. f. spontanca and showed that the cultivated rice was more closely relation to the annual wild rice than to the perennial wild rice.