Fig. 9.

Transmission electron microscopy of tapetum development of bcmf2 transgenic Chinese cabbage. (A) A large number of elaioplasts emerged in the bcmf2 tapetum at the late uninucleate stage. (B) At the early binucleate stage, the elaioplasts increased and enlarged further in the bcmf2 tapetum. (C) Tapetum in the bcmf2 transgenic plant begins to degenerate during the late binucleate stage. (D and E) A few elaioplast appeared in tapetum at the late uninucleate stage and the early binucleate stage of the empty vector-transformed plants. (F) At the trinucleate pollen stage, tapetum of the empty vector-transformed plants was still relatively complete. Ep, elaioplast.