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Percent of third- and fourth-order veins (y-axis) with a given sieve element number per minor loading vein (x-axis) for Italian (open circles), Col-0 (gray triangles), and Swedish (black squares) A. thaliana ecotypes grown under moderate light (400 μmol photons m−2 s−1) in (A) warm (25°C) or (B) cool (14°C) conditions. Second-order polynomial line fit for Italian (dashed line), Col-0 (dotted line), and Swedish (solid line) ecotypes.
