Starch granules related to the development of chloroplastsin Ammopiptanthus mongolicus
A chloroplast in Ammopiptanthus mongolicus general possesses 1~3 starch granules that are different in morphologic features,there mainly are 4 types.The first type,its electron-density is lower,but the outer part is higher than the central part and forms a ring area.Thought it is so,the electron-density in even in the two parts.The starch granule is usually oval,near thylakoidal morphology is normal and the structure is also very clear.The second type,its electron-density gradually changes low from out to inside.The majority of them is oval,near thylakoidal structure is clear.The third type,its outer part is higher than the central part,but its central part is not even in electron-density,the shape of the starch granules is various,near thylakoidal structure is nuclear.The fourth type,its electron-density is very low and quite even,but its shape is irregular and near thylakoidal structure has disintegrated or is disintegrating.Above-mentioned results show that the morphologic changes of starch granules are obvious relation with the development of their chloroplasts.