The stems and leaves of the tomato plant are poisonous. However, they are only toxic if consumed in large quantities. The only edible parts of the tomato plant are the unripe or ripened tomatoes. The toxic principles in tomato plants are demissine and solanine, also known as glycoalkcoloids.
About this Author
Pamela Gardapee is a writer with more than seven years writing Web content. Being functional in finances, home projects and computers has allowed Gardapee to give her readers valuable information. Gardapee studied accounting, computers and writing before offering her tax, computer and writing services to others.