In plants, Xylems are responsible for transport of

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amino acids.

food.

oxygen.

water.

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UPSC CISF-AC-EXE – 2021

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Xylem is one of the two types of transport tissue in vascular plants (the other being phloem). The primary function of xylem is to transport water and some dissolved nutrients from the roots to the rest of the plant and also provides structural support.

Xylem tissue consists of tracheary elements (tracheids and vessel elements), which are dead cells that form continuous tubes for water transport, along with parenchyma cells, fibers, and sometimes sclereids. The movement of water in xylem is primarily driven by transpiration pull, evaporation of water from leaves.

Phloem is responsible for transporting sugars (food produced during photosynthesis, primarily sucrose) from the leaves to other parts of the plant where they are needed for growth or storage. Amino acids are also transported in the phloem. Oxygen is obtained by plants directly from the atmosphere through stomata and lenticels for cellular respiration.

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