Fig. 3

Microstructure characterization of tobacco leaves: (a) SEM of epidermal tissues; (b) Cell shape with irregular and wavy pattern; (c) SEM of cross-section of the tobacco leave; (d) Enlargement of the SEM of cross-section of the tobacco leave.
Microstructure characterization of tobacco leaves: (a) SEM of epidermal tissues; (b) Cell shape with irregular and wavy pattern; (c) SEM of cross-section of the tobacco leave; (d) Enlargement of the SEM of cross-section of the tobacco leave.