White leaves

We noticed our new apple tree looking white around the leaves and stem,this was bought a few weeks ago and arrived in a bit of a state,the leaves were all curled up and unhappy looking,so we didn't plant it at first as we thought it was maybe dying off and we got a replacement after complaining,after a week or so left in the container it seemed to get a bit healthier maybe it just needed watering,a few days ago we decided to plant it and noticed these white leaves it seems to be the new one's that are affected and in three separate areas of the tree,can anybody let me know what this could be?
There's a few pics I took I hope you can see them ok.

 

Good evening @wiseowl is there anything I can do to help the tree we are beginner's
in the gardening world so not got a clue