Fig. 4.

The TEM images of seed embryo cell under each treatment. (a) the cell structure of normal seeds (×5000); (b) the cell structure of seeds with −10 °C for 10 h (×5000); (c) the cell structure of seeds with −20 °C for 10 h (×6000); (d) the cell nuclear structure of normal seeds (×15000); (e) the cell nuclear structure of seeds with −10 °C for 10 h (×15000); (f) the cell nuclear structure of seeds with −20 °C for 10 h (×25000); (g) the phospholipid molecules of normal seeds (×70000); (h) the phospholipid molecules of seeds with −10 °C for 10 h (×60000); (i) the phospholipid molecules of seeds with −20 °C for 10 h (×70000).