Electron micrographs of wheat microspores after pretreatment using transmission electron microscopy.

Abstract

<p>Figures a-c show differences in thickness of intine, number of cytoplasmic organelles and amount of starch accumulated in amyloplasts. (A) represents type I developmental pathway, (B) represents type II developmental pathway, and (C) represents type III developmental pathway. am =  amyloplast, ex =  exine wall, in =  intine layer, mt =  mitochondria, gl =  Golgi apparatus, p =  proplastid, rer =  rough endoplasmic reticulum, st =  starch.</p