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Stomatal and mesophyll conductances to CO2 in different plantgroups: Underrated factors for predicting leaf photosynthesisresponses to climate change?
In this study we predicted responses of several representative species among angiosperms, gymnosperms and ferns to increasing CO2 and temperature. Our results show that species with lower photosynthetic capacity – such as some ferns and gymnosperms – would be proportionally more favored under these foreseen environmental conditions. The main reason for this difference is the lower diffusion limitation imposed by gs and gm in plants having high capacity for photosynthesis among the angiosperms, which reduces the positive effect of increasing CO2. However, this apparent advantage of low-diffusion species would be canceled if the two conductances – gs and gm – acclimate and are down regulated to high CO2, which is basically unknown, especially for gymnosperms and ferns. Hence, for a better understanding of different plant responses to future climate, studies are urged in which the actual photosynthetic response/acclimation to increased CO2 and temperature of ferns, gymnosperms and other under-evaluated plant groups is assessed.
Publication titlePlant Science
Department/SchoolSchool of Natural Sciences
PublisherElsevier Sci Ireland Ltd
Place of publicationCustomer Relations Manager, Bay 15, Shannon Industrial Estate Co, Clare, Ireland
Rights statement© 2014 Elsevier Ireland Ltd. All rights reserved.