Figure 2: Photosynthesis parameters of four Douglas-fir provenances averaged over May and July of 2010 and 2011 for two field sites, Schluchsee and Wiesloch. | Scientific Reports

Figure 2: Photosynthesis parameters of four Douglas-fir provenances averaged over May and July of 2010 and 2011 for two field sites, Schluchsee and Wiesloch.

From: Variation in short-term and long-term responses of photosynthesis and isoprenoid-mediated photoprotection to soil water availability in four Douglas-fir provenances

Figure 2

(A) Assimilation rates (A), (B) stomatal conductance (gs), (C) intrinsic water-use efficiency (IWUE), (D) dark respiration rate (R), (E) carbon stable isotope discrimination (Δ13CWSOM), (F) maximum quantum yield of dark-adapted needles (Fv/Fm), (G) effective quantum yield of light-adapted needles (ΦPSII), and (H) non-photochemical quenching (NPQ). Data obtained from Schluchsee in May 2010 was excluded (see material and methods for further details). Significant differences between provenances (p < 0.05) are indicated by different letters.

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