I have unwrapped my mesh (using the seam placed in the center). I have scaled the object and applied transformations (Ctrl+A) . After applying the texture and unwrapping there is a partition edge between the texture. How to remove that edge partition or what wrong am I doing with the unwrap? The texture I've applied is 256x256. Do I need a larger size image? It looks dull and not sharp like the original.
You have to use a higher resolution texture (256X256 is really small) and hide the seams using texture paint brushes. Here's the result which uses the higher resolution texture and corrective brushes.
NOTE: Don't forget to save your painted texture in the UV Editor!