FIGURE 9.
(A,B) Transpiration rate, (C,D) minor vein density, (E,F) the ratio of minor vein tracheary to sieve elements, and (G,H) the ratio of minor vein tracheary to sieve element cross-sectional area for leaves of Italian (circles), Col-0 (triangles), and Swedish (squares) A. thaliana ecotypes grown at cool (14°C = blue-green symbols) or hot (36°C = olive-green symbols) leaf temperature as a function of the average (A,C,E,G) annual precipitation and (B,D,F,H) monthly precipitation during the growing season at the site from which each ecotype was obtained.