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C4 photosynthesis is an important example of convergent evolution in plants, having arisen in eudicots, monocots and diatoms. Comparisons between such diverse groups are confounded by phylogenetic and ecological differences, so that only broad generalisations can be made about the role of C4 photosynthesis in&#xd;&#xa;determining ecophysiological traits. However, 60% of C4 species occur in the grasses (Poaceae) and molecular phylogenetic techniques confirm that there are between 8 and 17 independent origins of C4 photosynthesis in the Poaceae. In a screening experiment, we compared leaf physiology and growth traits across several major&#xd;&#xa;independent C3 &#x26; C4 groups within the Poaceae, asking 1) which traits differ consistently between photosynthetic&#xd;&#xa;types and 2) which traits differ consistently between clades within each photosynthetic type

Ecophysiological traits of grasses: resolving the effects of photosynthetic pathway and phylogeny