The amyloplast usually possessed a larger, very low electron density starch grain which mainly was long shuttle and there were some higher electron density partition or wedge structure in it.
它的基质很少,多含有呈长梭形的、电子密度非常低的淀粉粒,并有一些电子密度较高的条带结构。
2
The fundamental characteristics of movement of density flow are similar with those of the saline wedge.