Figure 2.

Analyzing the anther cytology of 327A and 327B at different periods. (A–F) are anther paraffin sections of maintainer line 327B at different periods; (G–L) are paraffin sections of anther of sterile line 327A at different periods. (A,G) are spore-forming cell stages; (B,H) are the microspore mother stage; (C,I) are the meiosis phase; (D,J) are the tetrad periods; (E,K) are the binuclear phase; (F,L) is the mature stage. E: epidermal layer; EN: endodermis; ML: middle layer; T: tapetum layer; Sp: spore-forming cell; MMC: pollen mother cell; Msp: microspore; PG: pollen grains; dT: apoptotic tapetum layer; dTM: apoptotic tapetum and microspore. Scale= 100 μm.)