6. Modified Stem of a Plant

The basic functions of plant stems are; support, transport and storage of water and nutrients, and the production of new tissues. A modified stem of a plant is any stem that serves a purpose outside of these standard characteristics, typically as an adaptation to an unconventional environment. Vines are an example of a modified stem that allow a plant to climb various surfaces and provide additional stability. In the image, the vines of a crossvine plant can be seen climbing a metal rod.