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A meta-analysis of mesophyll conductance to CO2 in relation to major abiotic stresses in poplar species

View ORCID ProfileRaed Elferjani, Lahcen Benomar, Mina Momayyezi, Roberto Tognetti, Ülo Niinemets, Raju Y. Soolanayakanahally, View ORCID ProfileGuillaume Théroux-Rancourt, Tiina Tosens, Mebarek Lamara, Francesco Ripullone, Simon Bilodeau-Gauthier, Mohammed S. Lamhamedi, Carlo Calfapietra
doi: https://doi.org/10.1101/2020.10.19.346270
Raed Elferjani
1Réseau Reboisement Ligniculture Québec, Université TÉLUQ, Montréal, QC H2S 3L5, Canada
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  • ORCID record for Raed Elferjani
Lahcen Benomar
2Forest Research Institute, University of Québec in Abitibi-Témiscamingue, Rouyn-Noranda, QC, J9X 5E4, Canada
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  • For correspondence: lahcen.benomar.1@gmail.com
Mina Momayyezi
3Department of Viticulture and Enology, University of California, Davis, CA95616 USA
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Roberto Tognetti
4Università degli Studi del Molise, Via De Sanctis, 86100, Campobasso, Italy
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Ülo Niinemets
5Estonian University of Life Sciences, Kreutzwaldi 1, 51006 Tartu, Estonia
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Raju Y. Soolanayakanahally
6Indian Head Research Farm, Agriculture and Agri-Food Canada, Indian Head, SK, S0G 2K0, Canada
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Guillaume Théroux-Rancourt
7Institute of Botany, University of Natural Resources and Life Sciences, Gregor-Mendel-Strasse 33, 1180 Vienna, Austria
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Tiina Tosens
5Estonian University of Life Sciences, Kreutzwaldi 1, 51006 Tartu, Estonia
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Mebarek Lamara
2Forest Research Institute, University of Québec in Abitibi-Témiscamingue, Rouyn-Noranda, QC, J9X 5E4, Canada
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Francesco Ripullone
8University of Basilicata, Via Ateneo Lucano 10, 85100 Potenza, Italy
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Simon Bilodeau-Gauthier
9Direction de la recherche forestière, 2700 rue Einstein, Québec, QC, G1P 3W8, Canada
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Mohammed S. Lamhamedi
9Direction de la recherche forestière, 2700 rue Einstein, Québec, QC, G1P 3W8, Canada
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Carlo Calfapietra
10Institute of Agro-Environmental & Forest Biology (IBAF), National Research Council (CNR), Via Marconi 2, Porano (TR) 05010, Italy
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Abstract

Mesophyll conductance (gm) determines the diffusion of CO2 from the substomatal cavities to the site of carboxylation in the chloroplasts and represents a critical limiting factor to photosynthesis. In this study, we evaluated the average effect sizes of different environmental constraints on gm in Populus spp., a forest tree model. We collected raw data of 815 A-Ci response curves from 26 datasets to estimate gm, using a single curve-fitting method to alleviate method-related bias. We performed a meta-analysis to assess the effects of different abiotic stresses on gm. We found a significant increase in gm from the bottom to the top of the canopy that was concomitant with the increase of maximum rate of carboxylation and light-saturated photosynthetic rate (Amax). gm was positively associated with increases in soil moisture and nutrient availability, but insensitive to increasing soil copper concentration, and did not vary with atmospheric CO2 concentration. Our results showed that gm was strongly related to Amax and to a lesser extent to stomatal conductance (gs). Also, a negative linear relation was obtained between gm and specific leaf area, which may be used to scale-up gm within the canopy.

Footnotes

  • Highlight Our meta-analysis on the variation of mesophyll conductance under abiotic stresses shows a noticeable response to light gradient, soil moisture and nitrogen availability and a significant relationship with specific leaf area

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Posted October 21, 2020.
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A meta-analysis of mesophyll conductance to CO2 in relation to major abiotic stresses in poplar species
Raed Elferjani, Lahcen Benomar, Mina Momayyezi, Roberto Tognetti, Ülo Niinemets, Raju Y. Soolanayakanahally, Guillaume Théroux-Rancourt, Tiina Tosens, Mebarek Lamara, Francesco Ripullone, Simon Bilodeau-Gauthier, Mohammed S. Lamhamedi, Carlo Calfapietra
bioRxiv 2020.10.19.346270; doi: https://doi.org/10.1101/2020.10.19.346270
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A meta-analysis of mesophyll conductance to CO2 in relation to major abiotic stresses in poplar species
Raed Elferjani, Lahcen Benomar, Mina Momayyezi, Roberto Tognetti, Ülo Niinemets, Raju Y. Soolanayakanahally, Guillaume Théroux-Rancourt, Tiina Tosens, Mebarek Lamara, Francesco Ripullone, Simon Bilodeau-Gauthier, Mohammed S. Lamhamedi, Carlo Calfapietra
bioRxiv 2020.10.19.346270; doi: https://doi.org/10.1101/2020.10.19.346270

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