To begin I will explain my topic a little further: in my thesis I’m researching a product added to beer to make it brighter. The connection with vision and taste perception is obvious. The question then becomes is it nescesarry to make food look good for it to taste good?
I will give a definition of taste and perception:
Perception is the process by which we take in raw sensations from our environment using our senses and interpret these sensations using our past knowledge and understanding of the world in order that the sensation, or what we are sensing, becomes meaningful to us.
Taste is one of the five senses, affected by the contact of soluble substances on the tongue. Although humans can distinguish between a wide range of flavours, the sensation of taste is actually a response to a combination of several stimuli, including texture, temperature, and smell, as well as taste. 
http://www.gerardkeegan.co.uk/tsp/arm_project_1_gail.pdf ,McHugh, G., An investigation into taste perception, HND Social Science