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In most plants, the leaves contain the most chloroplasts and are the major sites of photosynthesis. Within a leaf, the chloroplasts are concentrated in the cells of the mesophyll, the inner layer of tissue (Figure 8-2).Figure 8-2Photosynthesis takes place in cellular organelles called chloroplasts. In this sunflower, the greatest numbers of chloroplasts are located in the leaves.ithin a leaf, the chloroplasts are concentrated in the cells of the mesophyll, the inner layer of tissue (Figure 8-2). Figure 8-2Photosynthesis takes place in cellular organelles called chloroplasts.
The majority of chloroplasts found in a leaf are located in the  cells of the palisade layer.ecause that is where the energy from the sun  is trapped, therefore the plant needs to have many chloroplasts in  order to capture the light energy.  â¦   The palisade cells are long and wide in order to increase the  surface area of contact with the sun.. 12 people found this useful.