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Leaf physico-chemical and physiological properties of maize (Zea mays L.) populations from different origins

AutorRevilla Temiño, Pedro ; Fernández, Victoria ; Álvarez-Iglesias, Lorena ; Medina Pueyo, Eva Teresa ; Cavero Campo, José
Palabras claveContact angles
Drought stress
Gas exchange rates
Plant surfaces
Surface free energy
Zea mays
Fecha de publicaciónoct-2016
CitaciónRevilla P, Fernández V, Álvarez-Iglesias L, Medina ET, Cavero J. Leaf physico-chemical and physiological properties of maize (Zea mays L.) populations from different origins. Plant Physiology and Biochemistry 107: 319–325 (2016)
ResumenIn this study we evaluated the leaf surface properties of maize populations native to different water availability environments. Leaf surface topography, wettability and gas exchange performance of five maize populations from the Sahara desert, dry (south) and humid (north-western) areas of Spain were analysed. Differences in wettability, stomatal and trichome densities, surface free energy and solubility parameter values were recorded between populations and leaf sides. Leaves from the humid Spanish population with special regard to the abaxial side, were less wettable and less susceptible to polar interactions. The higher wettability and hydrophilicity of Sahara populations with emphasis on the abaxial leaf surfaces, may favour dew deposition and foliar water absorption, hence improving water use efficiency under extremely dry conditions. Compared to the other Saharan populations, the dwarf one had a higher photosynthesis rate suggesting that dwarfism may be a strategy for improving plant tolerance to arid conditions. The results obtained for different maize populations suggest that leaf surfaces may vary in response to drought, but further studies will be required to examine the potential relationship between leaf surface properties and plant stress tolerance.
Descripción7 Pags.- 5 Tabls.- 1 Fig.
Versión del editorhttp://dx.doi.org/10.1016/j.plaphy.2016.06.017
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