Which tissue moves sugars from leaves to other parts of the plant?

Which tissue moves sugars from leaves to other parts of the plant?

• A. Xylem
• B. Phloem
• C. Cambium
• D. Pith

Answer: (B)

Sugars produced in leaves are moved through the phloem, the tissue specialized for translocating organic nutrients from sources (like photosynthetic leaves) to sinks (growing tissues, roots, fruits). This transport, called translocation, relies on companion cells and sieve tube elements to load sucrose into the phloem and then unload it where it’s needed. The movement follows a pressure-flow mechanism: loading sugars into the phloem at the source draws in water, raising pressure and pushing sap toward areas with lower pressure at sinks, where sugars are unloaded and water return to the xylem. In contrast, xylem mainly carries water and minerals from roots upward, cambium is a growth layer that produces new xylem and phloem, and pith serves as internal ground tissue for storage. So the tissue that moves sugars from leaves to other parts of the plant is the phloem.

Sugars produced in leaves are moved through the phloem, the tissue specialized for translocating organic nutrients from sources (like photosynthetic leaves) to sinks (growing tissues, roots, fruits). This transport, called translocation, relies on companion cells and sieve tube elements to load sucrose into the phloem and then unload it where it’s needed. The movement follows a pressure-flow mechanism: loading sugars into the phloem at the source draws in water, raising pressure and pushing sap toward areas with lower pressure at sinks, where sugars are unloaded and water return to the xylem. In contrast, xylem mainly carries water and minerals from roots upward, cambium is a growth layer that produces new xylem and phloem, and pith serves as internal ground tissue for storage. So the tissue that moves sugars from leaves to other parts of the plant is the phloem.