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  How do vascular plants perform photosynthesis in extreme environments? An integrative ecophysiological and biochemical story

Fernández-Marín, B., Gulías, J., Figueroa, C. M., Iñiguez, C., Clemente-Moreno, M. J., Nunes-Nesi, A., et al. (in press). How do vascular plants perform photosynthesis in extreme environments? An integrative ecophysiological and biochemical story. The Plant Journal. doi:10.1111/tpj.14694.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-81B7-A Version Permalink: http://hdl.handle.net/21.11116/0000-0005-81BA-7
Genre: Journal Article

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 Creators:
Fernández-Marín, Beatriz1, Author
Gulías, Javier1, Author
Figueroa, Carlos M.1, Author
Iñiguez, Concepción1, Author
Clemente-Moreno, María José1, Author
Nunes-Nesi, Adriano1, Author
Fernie, A. R.2, Author              
Cavieres, Lohengrin A.1, Author
Bravo, León A.1, Author
García-Plazaola, José I.1, Author
Gago, Jorge1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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Free keywords: chloroplast ultrastructure, photosynthetic pigments, VAZ, stomatal conductance, mesophyll conductance, Rubisco
 Abstract: Abstract In this work, we review the physiological and molecular mechanisms that allow vascular plants to perform photosynthesis in extreme environments, such as deserts, polar and alpine ecosystems. Specifically, we discuss the morpho/anatomical, photochemical and metabolic adaptive processes that enable a positive carbon balance in photosynthetic tissues under extreme temperatures and/or severe water limiting conditions in C3 species. Nevertheless, only a few studies describe the in situ functioning of photoprotection in plants from extreme environments, given the intrinsic difficulties of fieldwork in remote places; however, they cover a substantial geographical and functional range, which allowed us to describe some general trends. In general, photoprotection relies on the same mechanisms as those operating in the remaining plant species, ranging from enhanced morphological photoprotection to increased scavenging of oxidative products such as reactive oxygen species. Much less information is available about the main physiological and biochemical drivers of photosynthesis: stomatal conductance (gs), mesophyll conductance (gm) and carbon fixation mostly driven by Rubisco carboxylation. Extreme environments shape adaptations in structures, such as cell wall and membrane composition, the concentration and activation state of Calvin-Benson cycle enzymes, and Rubisco evolution, optimizing kinetic traits to ensure functionality. Altogether, these species display a combination of rearrangements, from the whole plant level to the molecular scale, to sustain a positive carbon balance in some of the most hostile environments on Earth.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Accepted / In Press
 Pages: -
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 Rev. Method: -
 Identifiers: DOI: 10.1111/tpj.14694
BibTex Citekey: doi:10.1111/tpj.14694
 Degree: -

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Title: The Plant Journal
  Other : Plant J.
Source Genre: Journal
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Publ. Info: Oxford : Blackwell Science
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0960-7412
CoNE: https://pure.mpg.de/cone/journals/resource/954925579095_1