Fig. 4.

Effects of C4 transactivation on Q0990>>C4 embryonic cotyledons and 2-week-old J0571>>C4 third leaf sizes (A) and cell numbers (B, C). (A) Compared to WT, Q0990>>C4 (left) had similar sized embryonic cotyledons and J0571>>C4 (right) had slightly larger third leaves in 2-week-old plants; length (black) or width (white) of cotyledons (µm) or leaves (mm x 10^–2). (B, C) Compared to WT, Q0990>>C4 embryonic cotyledons had more midvein vascular cells (black) without concurrent increases in mesophyll cell number (white) (B) and J0571>>C4 leaves had more mesophyll cells (C); cell number data are for ~63,000 µm² of field of view for cross-sections (B) and longitudinal sections (C). Values are mean ± SE for ≥3 leaves/cotyledons. 1, C4.1; 2, C4.2; 3, C4.3.