Different Metabolic Roles for Alternative Oxidase in Leaves of Palustrine and Terrestrial Species
Autor/a
Del-Saz, Nestor Fernandez
Douthe, Cyril
Carriqui, Marc
Ortiz, Jose
Sanhueza, Carolina
Rivas-Medina, Alicia
McDonald, Allison
Fernie, Alisdair R.
Ribas-Carbo, Miquel
Gago, Jorge
Flexas, Jaume
Fecha de publicación
2021-11-04ISSN
1664-462X
Resumen
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.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
633 - Cultivos y producciones
Páginas
16
Publicado por
Frontiers Media
Publicado en
Frontiers in Plant Science
Citación
Del-Saz, Nestor Fernandez, Cyril Douthe, Marc Carriquí, Jose Ortíz, Carolina Sanhueza, Alicia Rivas-Medina, and Allison McDonald et al. 2021. "Different Metabolic Roles For Alternative Oxidase In Leaves Of Palustrine And Terrestrial Species". Frontiers In Plant Science 12. doi:10.3389/fpls.2021.752795.
Número del acuerdo de la subvención
EC/H2020/753301/EU/Exploring the role of the mitochondrial alternative respiration in carotenoid biosynthesis during tomato fruit ripening/ARCATOM
MINECO-FEDER/Programa Estatal de generación del conocimiento y fortalecimiento científico y tecnológico del sistema I+D+I/PGC2018-093824-B-C41/ES/RAICES ECOFISIOLOGICAS Y EVOLUTIVAS DE LA TOLERANCIA A ESTRESES MULTIPLES EN PLANTAS/
MICIU/Programa Estatal de promoción del talento y su empleabilidad en I+D+I/RYC2019-027244-I/ES/Metagenomics and integrative biology tools to improve sustainable livestock systems/
Program
Genòmica i Biotecnologia
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