Modified roots
Many vegetables are modified roots, such as radishes and carrots, which store energy in the form of starches and sugars.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Robert Bear and David Rintoul, The Plant Body. November 17, 2013."
http://cnx.org/content/m47400/latest/
OpenStax CNX
CC BY 3.0.