Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species

The alternative oxidase pathway (AOP) is associated with excess energy dissipation in leaves of terrestrial plants. To address whether this association is less important in palustrine plants, we compared the role of AOP in balancing energy and carbon metabolism in palustrine and terrestrial environm...

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Autores principales:	Nestor Fernandez Del-Saz, Cyril Douthe, Marc Carriquí, Jose Ortíz, Carolina Sanhueza, Alicia Rivas-Medina, Allison McDonald, Alisdair R. Fernie, Miquel Ribas-Carbo, Jorge Gago, Igor Florez-Sarasa, Jaume Flexas
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	alternative oxidase pathway (AOP) cytochrome oxidase pathway (COP) electron partitioning to the AOP (τa) primary metabolism terrestrial species palustrine species Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/41640bbd042447a08055e0b16be53107
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spelling	oai:doaj.org-article:41640bbd042447a08055e0b16be531072021-11-04T07:30:14ZDifferent Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species1664-462X10.3389/fpls.2021.752795https://doaj.org/article/41640bbd042447a08055e0b16be531072021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.752795/fullhttps://doaj.org/toc/1664-462XThe alternative oxidase pathway (AOP) is associated with excess energy dissipation in leaves of terrestrial plants. To address whether this association is less important in palustrine plants, we compared the role of AOP in balancing energy and carbon metabolism in palustrine and terrestrial environments by identifying metabolic relationships between primary carbon metabolites and AOP in each habitat. We measured oxygen isotope discrimination during respiration, gas exchange, and metabolite profiles in aerial leaves of ten fern and angiosperm species belonging to five families organized as pairs of palustrine and terrestrial species. We performed a partial least square model combined with variable importance for projection to reveal relationships between the electron partitioning to the AOP (τa) and metabolite levels. Terrestrial plants showed higher values of net photosynthesis (AN) and τa, together with stronger metabolic relationships between τa and sugars, important for water conservation. Palustrine plants showed relationships between τa and metabolites related to the shikimate pathway and the GABA shunt, to be important for heterophylly. Excess energy dissipation via AOX is less crucial in palustrine environments than on land. The basis of this difference resides in the contrasting photosynthetic performance observed in each environment, thus reinforcing the importance of AOP for photosynthesis.Nestor Fernandez Del-SazCyril DoutheMarc CarriquíJose OrtízCarolina SanhuezaAlicia Rivas-MedinaAllison McDonaldAlisdair R. FernieMiquel Ribas-CarboJorge GagoIgor Florez-SarasaIgor Florez-SarasaJaume FlexasFrontiers Media S.A.articlealternative oxidase pathway (AOP)cytochrome oxidase pathway (COP)electron partitioning to the AOP (τa)primary metabolismterrestrial speciespalustrine speciesPlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	alternative oxidase pathway (AOP) cytochrome oxidase pathway (COP) electron partitioning to the AOP (τa) primary metabolism terrestrial species palustrine species Plant culture SB1-1110
spellingShingle	alternative oxidase pathway (AOP) cytochrome oxidase pathway (COP) electron partitioning to the AOP (τa) primary metabolism terrestrial species palustrine species Plant culture SB1-1110 Nestor Fernandez Del-Saz Cyril Douthe Marc Carriquí Jose Ortíz Carolina Sanhueza Alicia Rivas-Medina Allison McDonald Alisdair R. Fernie Miquel Ribas-Carbo Jorge Gago Igor Florez-Sarasa Igor Florez-Sarasa Jaume Flexas Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species
description	The alternative oxidase pathway (AOP) is associated with excess energy dissipation in leaves of terrestrial plants. To address whether this association is less important in palustrine plants, we compared the role of AOP in balancing energy and carbon metabolism in palustrine and terrestrial environments by identifying metabolic relationships between primary carbon metabolites and AOP in each habitat. We measured oxygen isotope discrimination during respiration, gas exchange, and metabolite profiles in aerial leaves of ten fern and angiosperm species belonging to five families organized as pairs of palustrine and terrestrial species. We performed a partial least square model combined with variable importance for projection to reveal relationships between the electron partitioning to the AOP (τa) and metabolite levels. Terrestrial plants showed higher values of net photosynthesis (AN) and τa, together with stronger metabolic relationships between τa and sugars, important for water conservation. Palustrine plants showed relationships between τa and metabolites related to the shikimate pathway and the GABA shunt, to be important for heterophylly. Excess energy dissipation via AOX is less crucial in palustrine environments than on land. The basis of this difference resides in the contrasting photosynthetic performance observed in each environment, thus reinforcing the importance of AOP for photosynthesis.
format	article
author	Nestor Fernandez Del-Saz Cyril Douthe Marc Carriquí Jose Ortíz Carolina Sanhueza Alicia Rivas-Medina Allison McDonald Alisdair R. Fernie Miquel Ribas-Carbo Jorge Gago Igor Florez-Sarasa Igor Florez-Sarasa Jaume Flexas
author_facet	Nestor Fernandez Del-Saz Cyril Douthe Marc Carriquí Jose Ortíz Carolina Sanhueza Alicia Rivas-Medina Allison McDonald Alisdair R. Fernie Miquel Ribas-Carbo Jorge Gago Igor Florez-Sarasa Igor Florez-Sarasa Jaume Flexas
author_sort	Nestor Fernandez Del-Saz
title	Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species
title_short	Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species
title_full	Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species
title_fullStr	Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species
title_full_unstemmed	Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species
title_sort	different metabolic roles for alternative oxidase in leaves of palustrine and terrestrial species
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/41640bbd042447a08055e0b16be53107
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Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species

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