Water-use efficiency in Flaveria species under drought-stress conditions
Environmental conditions that promote photorespiration are considered to be a major driving force for the evolution of C4 species from C3 ancestors. The genus Flaveria contains C3 and C4 species as well as a variety of intermediate species. In this study, we compare the water-use efficiency of intermediate Flaveria species to that of C3 and C4 species. The results indicate that under both well-watered and a drought-stress condition, C3–C4 and C4-like intermediacy in Flaveria species improve water-use efficiency as compared to C3 species.
Additional key wordsdrought stress Flaveria intermediate species water-use efficiency
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This work was supported by Portuguese Foundation for Science and Technology (FCT): grant reference SFRH/BPD/41700/2007.
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