Fig. 3

Observation of paraffin sections of anther of Y66 and Y73 plants at different developmental stages. Y66 sterile plant anther section at pollen maturation stage (A), pre-flowering stage (B and C), flowering stage (D). Y66 fertile plant anther section at pollen maturation stage (E), pre-flowering stage (F and G), flowering stage (H). Y73 sterile plant anther section at pollen maturation stage (I), pre-flowering stage (J and K), flowering stage (L). Y73 fertile plant anther section at pollen maturation stage (M), pre-flowering stage (N and O), and flowering stage (P). Ep: epidermis; En: endothecium; Ta: tapetum; PG: pollen grain; EPG: empty pollen grain; St: stomium; V: vascular bundle; C: connective. Scale bar: A, B, E, F, I, J, M, and N: 100 μm; C, D, G, H, K, L, O, and P: 200 μm