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Antioxidants
Volume 11
Issue 3
10.3390/antiox11030562
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Article

Enhanced Photosynthetic Capacity, Osmotic Adjustment and Antioxidant Defenses Contribute to Improve Tolerance to Moderate Water Deficit and Recovery of Triploid Citrus Genotypes

by
Radia Lourkisti
1,*,
Yann Froelicher
2,3,
Raphaël Morillon
2,4,
Liliane Berti
1 and
Jérémie Santini
1
1
Laboratoire de Biochimie et Biologie Moléculaire du Végétal, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR), 6134 Sciences pour l’Environnement (SPE), Université de Corse, 20250 Corte, France
2
Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR AGAP Institut, INRAE, Institut Agro, University Montpellier, 34398 Montpellier, France
3
CIRAD, UMR AGAP, 20230 San Giuliano, France
4
CIRAD, UMR AGAP Institut, 34398 Montpellier, France
*
Author to whom correspondence should be addressed.
Antioxidants 2022, 11(3), 562; https://doi.org/10.3390/antiox11030562
Submission received: 18 February 2022 / Revised: 10 March 2022 / Accepted: 11 March 2022 / Published: 16 March 2022
(This article belongs to the Special Issue Environmental Stress and Antioxidant Defences)
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Abstract

Currently, drought stress is a major issue for crop productivity, and future climate models predict a rise in frequency and severity of drought episodes. Polyploidy has been related to improved tolerance of plants to environmental stresses. In Citrus breeding programs, the use of triploidy is an effective way to produce seedless fruits, one of the greatest consumer expectations. The current study used physiological and biochemical parameters to assess the differential responses to moderate water deficit of 3x genotypes compared to 2x genotypes belonging to the same hybridization. Both parents, the mandarin Fortune and Ellendale tangor, were also included in the experimental design, while the 2x common clementine tree was used as reference. Water deficit affects leaf water status, as well as physiological and detoxification processes. Triploid genotypes showed a better ability to maintain water status through increased proline content and photosynthetic capacity. Moreover, less oxidative damage was associated with stronger antioxidant defenses in triploid genotypes. We also found that triploidy improved the recovery capacity after a water deficit episode.
Keywords: antioxidant system; ROS accumulation; osmolytes; enzymatic antioxidant; Citrus; polyploidy; drought stress antioxidant system; ROS accumulation; osmolytes; enzymatic antioxidant; Citrus; polyploidy; drought stress

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MDPI and ACS Style

Lourkisti, R.; Froelicher, Y.; Morillon, R.; Berti, L.; Santini, J. Enhanced Photosynthetic Capacity, Osmotic Adjustment and Antioxidant Defenses Contribute to Improve Tolerance to Moderate Water Deficit and Recovery of Triploid Citrus Genotypes. Antioxidants 2022, 11, 562. https://doi.org/10.3390/antiox11030562

AMA Style

Lourkisti R, Froelicher Y, Morillon R, Berti L, Santini J. Enhanced Photosynthetic Capacity, Osmotic Adjustment and Antioxidant Defenses Contribute to Improve Tolerance to Moderate Water Deficit and Recovery of Triploid Citrus Genotypes. Antioxidants. 2022; 11(3):562. https://doi.org/10.3390/antiox11030562

Chicago/Turabian Style

Lourkisti, Radia, Yann Froelicher, Raphaël Morillon, Liliane Berti, and Jérémie Santini. 2022. "Enhanced Photosynthetic Capacity, Osmotic Adjustment and Antioxidant Defenses Contribute to Improve Tolerance to Moderate Water Deficit and Recovery of Triploid Citrus Genotypes" Antioxidants 11, no. 3: 562. https://doi.org/10.3390/antiox11030562

APA Style

Lourkisti, R., Froelicher, Y., Morillon, R., Berti, L., & Santini, J. (2022). Enhanced Photosynthetic Capacity, Osmotic Adjustment and Antioxidant Defenses Contribute to Improve Tolerance to Moderate Water Deficit and Recovery of Triploid Citrus Genotypes. Antioxidants, 11(3), 562. https://doi.org/10.3390/antiox11030562

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