Acclimation and adaptation components of the temperature dependence of plant photosynthesis at the global scale

Dushan P Kumarathunge, Belinda E Medlyn, John E Drake, Mark G Tjoelker, Michael J Aspinwall, Michael Battaglia, Francisco J Cano, Kelsey R Carter, Molly A Cavaleri, Lucas A Cernusak, Jeffrey Q Chambers, Kristine Y Crous, Martin G De Kauwe, Dylan N Dillaway, Erwin Dreyer, David S Ellsworth, Oula Ghannoum, Qingmin Han, Kouki Hikosaka, Anna M JensenJeff W G Kelly, Eric L Kruger, Lina M Mercado, Yusuke Onoda, Peter B Reich, Alistair Rogers, Martijn Slot, Nicholas Smith, Lasse Tarvainen, David Tissue, Henrique F Togashi, Edgard S Tribuzy, Johan Uddling, Jeffrey M Warren, Danielle A Way

Research output: Contribution to journalArticlepeer-review

Abstract

Summary The temperature response of photosynthesis is one of the key factors determining predicted responses to warming in global vegetation models (GVMs). The response may vary geographically, owing to genetic adaptation to climate, and temporally, as a result of acclimation to changes in ambient temperature. Our goal was to develop a robust quantitative global model representing acclimation and adaptation of photosynthetic temperature responses. We quantified and modelled key mechanisms responsible for photosynthetic temperature acclimation and adaptation using a global dataset of photosynthetic CO2 response curves, including data from 141 C3 species from tropical rainforest to Arctic tundra. We separated temperature acclimation and adaptation processes by considering seasonal and common-garden datasets, respectively. The observed global variation in the temperature optimum of photosynthesis was primarily explained by biochemical limitations to photosynthesis, rather than stomatal c
Original languageEnglish
Pages (from-to)768-784
JournalNew Phytologist
DOIs
StatePublished - 2019

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