C4 photosynthesis originated as an adaptation to low atmospheric CO2 concentrations 30–35 million years ago ([Sage, 2016][1]). Although accounting for only 3% of the vascular plants on earth, C4 plants… Click to show full abstract
C4 photosynthesis originated as an adaptation to low atmospheric CO2 concentrations 30–35 million years ago ([Sage, 2016][1]). Although accounting for only 3% of the vascular plants on earth, C4 plants contribute 25% of terrestrial photosynthesis ([Westhoff and Gowik, 2010][2]), thus providing a
               
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