Energy dissipation in C3 plants under drought

Functional Plant Biology : FPB
J Flexas, Hipólito Medrano

Abstract

A general quantification of the relative contribution of different light energy dissipation processes to total dissipation under different drought conditions is lacking. Here we compare six studies, including enough data for such a general quantification, to build up a general pattern of the relative importance of several energy dissipation mechanisms in response to drought in C3 plants. Such a general pattern apparently emerges independently of specific acclimation to drought, but largely dependent on CO2 availability in the chloroplasts, which may be regulated under drought by adjustments in stomatal and mesophyll conductances. Under irrigation and saturating light, more than 50% of absorbed light is thermally dissipated, while photosynthesis dissipates 20-30% and photorespiration 10-20%. Under mild drought, the contribution of photosynthesis decreases, and that of photorespiration increases in a compensatory manner. During moderate to severe drought, the contribution of both photosynthesis and photorespiration decreases, and thermal dissipation increases up to 70-90% of the total light absorbed. The contribution of other processes, like the Mehler reaction, is shown to be very low under both irrigation and drought. Therefore...Continue Reading

Citations

May 23, 2008·Physiologia Plantarum·Philippus Daniel Riekert van Heerden, Robert Laurie
Jun 1, 2016·Frontiers in Plant Science·Stefania ToscanoDaniela Romano
Nov 7, 2016·Photosynthesis Research·Hazem M KalajiWojciech Bąba
Apr 23, 2011·Journal of Experimental Botany·Marta S LopesChristine H Foyer
Jul 20, 2019·Plants·Cátia BritoCarlos M Correia
Feb 23, 2020·Ecological Applications : a Publication of the Ecological Society of America·Levi T HelmXi Yang
May 22, 2004·Physiologia Plantarum·Luke HendricksonWah Soon Chow
Jul 19, 2013·Photosynthesis Research·Marek ZivcakSuleyman I Allakhverdiev
May 29, 2014·Journal of Experimental Botany·Albert Porcar-CastellJoseph A Berry
Jun 11, 2014·International Journal of Phytoremediation·Fernanda S FarneseJosé Cambraia
May 24, 2020·Plant Biotechnology Journal·Qiang ZhaoYang-Yang Li
Oct 13, 2020·Plant Signaling & Behavior·Qianwei LiuChao Li
Aug 30, 2005·Plant Physiology·Miquel Ribas-CarboJaume Flexas
Sep 1, 2021·Plant, Cell & Environment·Petra D'OdoricoIngo Ensminger

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