Figure 2

Physiological analysis of Slyc and Sper leaves under moderated and severe drought stress. (a) Water potential, (b) osmotic potential, (c) Chlorophyll fluorescense and (d) electron transport rate (photosynthesis), (e) proline concentration, for leaves of Sper (black bars) and Slyc (grey bars) under optimal (Control), moderated (MD) and severe (SD) drought treatment. Results are expressed as mean ± SE. Data with different letters across water stress and tomato species indicate significant differences according Tukey statistical test (P ≤ 0.05).