The companion cells are part of the

Dave333

4 years ago

The companion cells are specialized parenchyma cells in the phloem tissues of the angioman-fluids. They are nucleated living cells with several ribosomes, plastids, and mitochondria.

audrey400

3 months ago

The phloem is the tissue responsible for translocation (moving food from the leaves to the rest of the plant). Sieve tube elements do the actual carrying, but they lose their nucleus as they mature to make more room for food flow.
Because the sieve tube has no nucleus, the companion cell acts as its "brain" or life-support system, providing the energy and proteins needed for the sieve tube to function.