Wheat in wine recipes

Anybody know why wine recipes often use wheat in the mix. For flavour or for something else?
Nigel

 

Mainly for nutrient for the yeast. A lot of flower type wines have the flavour but not enough organic matter for the yeast to feed off.

Often substituted by yeast nutrient, which you can buy in brewing shops.

 

If you use wheat,barley or rye make sure it clean and there is no Egot in the sample

 

Thanks for the info. Looks like yeast nutrient then.
Nigel