I certainly see what feel you are going for with this image and i beleive the single most element that's holding it back it the lighting. This image would leap off the screen if you would either increase your exposure time or simply add more light. This would also make the texture of these fruits much more visiable.
Let's say that you didn't have access to lighting equipment at the time nor a tripod increase exposure time, then you could help this photography out by playing around with the levels. This would make the colors more vibrant and pleasing to the eye. Adobe Photoshop (3 and up) has fantastic levels functions (color correction functions) that can allow you to enhance your image greatly and best of all it's totally legal to play around with the levels in the challenges.
A few other things... removing the stickers from the lemons would also add to this image. They are a bit distracting and take away from the overall feel. You could even try arranging all the lemons in the same way...ie all facing north, to give more of a rythmic pattern to the image.
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