Articles | Volume 20, issue 1
https://doi.org/10.5194/we-20-19-2020
https://doi.org/10.5194/we-20-19-2020
Standard article
 | 
12 May 2020
Standard article |  | 12 May 2020

Pollen morphological variability correlates with a large-scale gradient of aridity

Hindel Fatmi, Souhaïl Mâalem, Bouchra Harsa, Ahmed Dekak, and Haroun Chenchouni

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Cited articles

Amer, W. M. and Amany, S. A.: Infra-specific pollen diversity of Atriplex halimus L. in Egyptian flora, International Journal of Research Studies in Biosciences, 2, 36–48, 2014. 
Angiosperm Phylogeny Group: An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III, Bot. J. Linn. Soc., 161, 105–121, https://doi.org/10.1111/j.1095-8339.2009.00996.x, 2009. 
Beaulieu, J. M., Leitch, I. J., Patel, S., Pendharkar, A., and Knight, C. A.: Genome size is a strong predictor of cell size and stomatal density in angiosperms, New Phytol., 179, 975–986. https://doi.org/10.1111/j.1469-8137.2008.02528.x, 2008. 
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Short summary
This study determines the diversity of pollen morphotypes of Atriplex halimus (Amaranthaceae) along a large-scale climatic gradient. Occurrences of 10 pollen grain shapes were quantified at seven climates across a humid-to-hyperarid gradient. We discuss how the evolutionary effects of climate gradients on pollen morphology and variability in dryland induce a high level of specialization to maximize trade-offs between adaptation to severe ecological conditions and pollination efficiency.