Question

What are sieve tubes?

Answer 1

In plant anatomy, sieve tube elements, also called sieve tube members, are a specialised type of elongated cell in the phloem tissue of flowering plants. The ends of these cells are connected with other sieve tube members, and together they constitute the sieve tube. The main function of the sieve tube is the transport of carbohydrates, primarily sucrose, in the plant (e.g., from the leaves to the fruits and roots).