Fig. 5
Changes in (a) the mesophyll thickness (Tmes), (b) cell wall thickness (Tcw), (c) volume fraction of intercellular air spaces (fias) and (d) chlorophyll surface area exposed to leaf intercellular air spaces per leaf area (Sc/S) in tomato seedlings under the well-watered (CK) and drought treatments. Data are means ± standard error (SE) (n=6). Different letters denote statistically significant differences between treatments (P < 0.01)