Photoperiodic regulation of the seasonal pattern of photosynthetic capacity and the implications for carbon cycling.

Proceedings of the National Academy of Sciences of the United States of America
William L BauerleRobert F Reynolds

Abstract

Although temperature is an important driver of seasonal changes in photosynthetic physiology, photoperiod also regulates leaf activity. Climate change will extend growing seasons if temperature cues predominate, but photoperiod-controlled species will show limited responsiveness to warming. We show that photoperiod explains more seasonal variation in photosynthetic activity across 23 tree species than temperature. Although leaves remain green, photosynthetic capacity peaks just after summer solstice and declines with decreasing photoperiod, before air temperatures peak. In support of these findings, saplings grown at constant temperature but exposed to an extended photoperiod maintained high photosynthetic capacity, but photosynthetic activity declined in saplings experiencing a naturally shortening photoperiod; leaves remained equally green in both treatments. Incorporating a photoperiodic correction of photosynthetic physiology into a global-scale terrestrial carbon-cycle model significantly improves predictions of seasonal atmospheric CO(2) cycling, demonstrating the benefit of such a function in coupled climate system models. Accounting for photoperiod-induced seasonality in photosynthetic parameters reduces modeled global ...Continue Reading

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Citations

Apr 9, 2013·Photosynthesis Research·Alistair Rogers
Sep 15, 2012·Tree Physiology·Albert Porcar-Castell, Sari Palmroth
Mar 7, 2014·Journal of Experimental Botany·Howard Thomas, Helen Ougham
Aug 22, 2014·Plant, Cell & Environment·Danielle A Way, Rebecca A Montgomery
Oct 12, 2013·Global Change Biology·James S ClarkCarl Salk
Mar 29, 2014·Global Change Biology·Taehee HwangJason P Love
Jan 15, 2014·Global Change Biology·Edward R BrzostekRichard P Phillips
Apr 9, 2015·Frontiers in Plant Science·Christine Y ChangIngo Ensminger
Nov 29, 2016·The New Phytologist·Alistair RogersSönke Zaehle
Dec 8, 2016·Plant, Cell & Environment·Grace L MinerDennis D Baldocchi
Feb 16, 2017·Anais Da Academia Brasileira De Ciências·Letícia C GarciaJosé P Lemos-Filho
Apr 4, 2019·Global Change Biology·Taejin ParkRanga B Myneni
Nov 5, 2019·Plant, Cell & Environment·Elena GrandaVíctor Resco de Dios
Nov 7, 2019·International Journal of Biometeorology·Dina F ZhirnovaEugene A Vaganov
May 13, 2020·Global Change Biology·Emmanuelle FréchetteIngo Ensminger
Oct 3, 2018·Ecology and Evolution·Rachel C KehoeF J Frank van Veen
Apr 29, 2020·Proceedings of the National Academy of Sciences of the United States of America·Rebecca A MontgomeryPeter B Reich
Feb 26, 2016·Ecological Applications : a Publication of the Ecological Society of America·Ashehad A AliCathy J Wilson

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