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. 2019 Mar 18;180(2):1066–1080. doi: 10.1104/pp.18.01238

Figure 5.

Figure 5.

Water use efficiency conferred by deficiency in ABA coreceptors. A, Thermogram of 43-d-old wild-type Col-0 and Arabidopsis mutants deficient of ABI1 (abi1) and ABI2 (abi2). Scale bar = 2 cm. B, The averaged leaf temperature from (A) and the leaf area of the plants at day 48 grown under well-watered conditions. C to J, Analysis of the double mutant abi1abi2 and the triple mutant abi1abi2hab1 in comparison to Col-0 (Col) and the RCAR6-3 line (R6) under progressive drought. C, Thermogram. Scale bar = 2 cm. D, Leaf temperature. E, Leaf area at day 22 (open column) of the progressive drought experiment. At day 22, the plants were grown 40 d at well-watered conditions (SWC ≥ 60%, Ψ ≥ −0.08 MPa). The size of the plantlets at day 0 of the experiment is indicated by filled columns in (E). F, Growth of the plants expressed as an increase in the projected leaf area. Note the decrease in leaf area caused by wilting and starting for Col-0 from day 40. G, Wilted Col-0 and turgescent rosettes of other plant lines at day 46. Scale bar = 4 cm. H, Consumed water. I) Above-ground dry matter. The values above the columns indicate the percentage gain in WUE compared with Col-0. J, WUE at the end of the terminal drought at day 58. In (A) to (I), mean ±sem, n = four biological replicates per line, **P < 0.01, ***P < 0.001 (one-way ANOVA) compared with Col-0.