grana

The inside of a chloroplast with the granum circled.

叶绿的内部构造与颗粒盘旋。

The uniformity of chloroplast grana lamellae,, the numbers and cristae of mitochondria, and the concentration of nucleus karyolymph were different among different mature grade leaves.

熟度叶片超微结构变化明显，主要表现在叶绿片层结构整齐程度、线粒个数和嵴数以及细液浓度上。