Some facts

Tomato is Red due to the presence of Lycopene.


Turmeric is Yellow due to presence of Curcumin.
 

Colour of Carrot is due to presence of Carotene.
  


Some times Potato is green due to presence of Solanine .it is a toxin so green potato should not be eaten.
  

Apple is red due to presence of Anthocynin.


Papaya is yellow due to presence of caraxanthin.
 

Beet is dark red due to presence of Betalin.
 

Onion contains Sulfenic acid, due to this tear appears in Eyes.
 

Red colour of Onions is due to presence of  anthocyanidins.

Plants harmones that induced cell division is Kinins.