The differences in pollen morphology between the control and bcmf26a/b were observed from the uninucleate microscope stage to the trinucleate microscope stage. aP, aborted pollen; E, epidermis; En, endothecium; ML, middle layer; Msp, microspore; P, pollen; Tp, tapetum; Tds, tetrads; Bm, binucleate microscope; MP, mature pollen.
Source: wiktionary