Abstract
Over three years (2004-2006), the chlorophyll concentration, surface and specific leaf weight, density, surface area, and stomate opening sensitivity were measured on different almond varieties growing in different soils and climates and with varying water availability. In almond, different anatomic and physiologic leaf behaviours are observed in response to specific water stress situations. Varieties such as ‘Guara’ have good cuticle isolation while others, such as ‘Masbovera’, have a high sensitivity to stomate closure. These preliminary results show a correlation between the chlorophyll meter (SPAD) reading and specific leaf weight. Also, leaf surface is a genetic character, which suffers slight modifications due to environmental conditions. There is an inverse correlation between stomate density and stomate surface. Likewise, a correlation between leaf water potential and leaf saturation permits calculation of the stomate closure sensitivity for each cultivar.
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