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International Journal of Plant Biology is published by MDPI from Volume 13 Issue 1 (2022). Previous articles were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence, and they are hosted by MDPI on mdpi.com as a courtesy and upon agreement with PAGEPress.
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Article

Ecophysiological Response and Morphological Adjustment of Argania spinosa L. Skeels under Contrasting Climates: Case Study of Marginal Populations

by
Mohamed Ait Bihi
1,
Fatima Ain-Lhout
2,3,*,
Abdelhakim Hatimi
1,
Fadma Fahmi
1 and
Saida Tahrouch
1
1
Laboratory of Plant Biotechnology, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
2
Department of Environment and Life Sciences, Faculty of Applied Sciences, Ibn Zohr University, Agadir, Morocco
3
Faculté des Sciences Appliquées, Campus Universitaire Ait Meloul, Route Nationale N10, BP 6146 Cité Azrou, Ait Melloul 86150, Morocco
*
Author to whom correspondence should be addressed.
Int. J. Plant Biol. 2021, 12(1), 9404; https://doi.org/10.4081/pb.2021.9404
Submission received: 18 October 2021 / Revised: 18 November 2021 / Accepted: 19 November 2021 / Published: 5 January 2022

Abstract

In this paper, we investigated the seasonal physiological performance and morphological adjustment of Argania spinosa growing under contrasting climatic and biogeographic conditions.Two marginal populations were selected in the main distribution area of the species, one at the Northwest and the other one at the South-west. Trees from the North showed a Mediterranean pattern in Photosynthetic performances, exhibiting maximal carbon assimilation during spring and minimum in summer. In contrast, trees from the South showed a different pattern with maximum values recorded in winter and minimum in spring. Photochemical efficiency of PSII results evidenced the absence of damage to PSII in both sites, probably due to an efficient energy dissipation processed by carotenoid pigments. We recorded increased LMA values in the South, which improves drought resistance. Increasing stomatal length and decreasing stomatal density were registered during the drought season in both populations. A. Spinosa is sensitive to changes in the length of drought stress at its Southern limit. The scarcity of rainfall leading to persistent drought has limited the distribution of the species to the banks of dry Wadis and depressions, where it finds some water compensations during summer. In the North, the summer drought severely impacted the species carbon assimilation.
Keywords: drought; photosynthesis; stomatal conductance; relative water content drought; photosynthesis; stomatal conductance; relative water content

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MDPI and ACS Style

Ait Bihi, M.; Ain-Lhout, F.; Hatimi, A.; Fahmi, F.; Tahrouch, S. Ecophysiological Response and Morphological Adjustment of Argania spinosa L. Skeels under Contrasting Climates: Case Study of Marginal Populations. Int. J. Plant Biol. 2021, 12, 9404. https://doi.org/10.4081/pb.2021.9404

AMA Style

Ait Bihi M, Ain-Lhout F, Hatimi A, Fahmi F, Tahrouch S. Ecophysiological Response and Morphological Adjustment of Argania spinosa L. Skeels under Contrasting Climates: Case Study of Marginal Populations. International Journal of Plant Biology. 2021; 12(1):9404. https://doi.org/10.4081/pb.2021.9404

Chicago/Turabian Style

Ait Bihi, Mohamed, Fatima Ain-Lhout, Abdelhakim Hatimi, Fadma Fahmi, and Saida Tahrouch. 2021. "Ecophysiological Response and Morphological Adjustment of Argania spinosa L. Skeels under Contrasting Climates: Case Study of Marginal Populations" International Journal of Plant Biology 12, no. 1: 9404. https://doi.org/10.4081/pb.2021.9404

APA Style

Ait Bihi, M., Ain-Lhout, F., Hatimi, A., Fahmi, F., & Tahrouch, S. (2021). Ecophysiological Response and Morphological Adjustment of Argania spinosa L. Skeels under Contrasting Climates: Case Study of Marginal Populations. International Journal of Plant Biology, 12(1), 9404. https://doi.org/10.4081/pb.2021.9404

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