Rise in Oral Allergies

I found this very interesting.  In Europe, they have found that more and more children are allergic to vegetables and fruits.  

While they do not have specific reasons, yet, speculation and theories are looking closely at the modern western lifestyle and diet.  Interestingly enough, car exhaust emissions make for a rise in pollen allergies and therefore may be affecting fruit pollination.  

My question - could this also be in part to GMO's? I know that European countries have stricter laws against integrating engineered produce into the markets... but what if?