[dschiptsov]

Actually, it is not the parts of a plant that matters most, but the soil in which the plant grows. The very same tomatoes grown on fertile slopes of Himalaya or on North Indian Plain has very different compounds in it than hydroponic ones. This why Nepalese or Indian tomatoes are so tasty. Even such a crude instrument as tongue could tell the difference. It also will tell if a soup has been cooked with bones or not.