Painted fruit and veg reveal plant origins

Colourful still life paintings of bowls of fruit have been a favourite of artists for generations, and there are thousands of examples in art galleries across the world. Now, two friends from Belgium - one an art historian, and the other a plant biologist - are asking for your help to find paintings that reveal clues about how some of our modern foods came into being. This unusual project came about when the two of them were on holiday in St Petersburg, and visited a museum - as Ive de Smet told Katie Haylor...