In the chloroplast of Polygonum viviparum, the central parts of the starch grains were heavy in electron-density, whereas the outer parts were light.
In the chloroplast of Polygonum viviparum, the central parts of the starch grains were heavy in electron-density, whereas the outer parts were light.
在珠芽萝的叶绿体中，淀粉粒的电子密度内外不均匀，外周电子密度低，中央电子密度高。