Abstract:

In order to study the sensitivity of rice male sterile lines to GA3, and the relationship with surface structures of flag leaf, seven rice male sterile lines with different sensitivity to GA3 were selected from the breeding units and product units. Their surface structures of flag leaf were observed by electron microscope. The results showed that papillae number, siliceous cell area, length and width of stoma on the leaf surfaces of the different rice male sterile lines were completely different. Compared to the rice male sterile lines insensitive to GA3, the rice male sterile lines sensitive to GA3 had less papillae, smaller siliceous cell area, more stoma and more papillae on the stoma. The sensitive degree to GA3 of rice male sterile lines had a certain relationship between papillae number, siliceous cell area, stomata number and papillae number on the stoma.