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Abstract

Leaf physiological responses, chlorophyll content and stomata density of two cultivars Xestawi and Suranni (Olea europaea L.) transplants grown under two levels of light intensity (100% and 50%) of full light and different concentrations of calcium and boric acid (0.25% and 0.50%) and (50 and 100 mg.L-1) respectively were studied in addition to control. These studies aimed to discuss the effect of light intensity and some chemical compounds on some physiological responses of olive transplants [net photosynthesis, stomata transpiration, stomata conductance rates and water use efficiency (WUE), in addition chlorophyll a, chlorophyll b, stomata density and guard cell thickness]. The result showed that all above parameters significantly increased in 100% light intensity except in the case of water use efficiency, it decreased in 100% light intensity. While the effect of mineral compounds on all of the parameters were varied. The transplants treated with 100 mg.L-1 boric acid showed higher net photosynthesis, transpiration and stomatal conductance. Hence, higher rates of water use efficiency, stomata density, guard cell thickness and chlorophyll b were found in transplants treated with both concentrations of calcium (0.25% and 0.50%).

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