Significant Links Between Photosynthetic Capacity, Atmospheric CO 2 and the Diversification of C 3 Plants During the Last 80 Million Years.

Autor: Schweiger AH; Institute of Landscape and Plant Ecology, Department of Plant Ecology, University of Hohenheim, Stuttgart, Germany., Schweiger JM; Centre for Organic Farming, University of Hohenheim, Stuttgart, Germany.
Jazyk: angličtina
Zdroj: Ecology letters [Ecol Lett] 2024 Oct; Vol. 27 (10), pp. e14523.
DOI: 10.1111/ele.14523
Abstrakt: Changing CO 2 concentrations will continue to affect plant growth with consequences for ecosystem functioning. The adaptive capacity of C 3 photosynthesis to changing CO 2 concentrations is, however, insufficiently investigated so far. Here, we focused on the phylogenetic dynamics of maximum carboxylation rate (V cmax ) and maximum electron transport rate (J max )-two key determinants of photosynthetic capacity in C 3 plants-and their relation to deep-time dynamics in species diversification, speciation and atmospheric CO 2 concentrations during the last 80 million years. We observed positive relationships between photosynthetic capacity and species diversification as well as speciation rates. We furthermore observed a shift in the relationships between photosynthetic capacity, evolutionary dynamics and prehistoric CO 2 fluctuations about 30 million years ago. From this, we deduce strong links between photosynthetic capacity and evolutionary dynamics in C 3 plants. We furthermore conclude that low CO 2 environments in prehistory might have changed adaptive processes within the C 3 photosynthetic pathway.
(© 2024 The Author(s). Ecology Letters published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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