How do xylem and phloem work together

Companion cells — transport of substances in the phloem requires energy. One or more companion cells attached to each sieve tube provide this energy. A sieve tube is completely dependent on its companion cell s.

Comparison of transport in the xylem and phloem Xylem Phloem Type of transport Physical process Requires energy Substances transported Water and minerals Products of photosynthesis including sugars and amino acids dissolved in water Direction of transport Upwards Upwards and downwards.

Physical process. Requires energy. Location in vascular bundle Phloem occur on outer side of the vascular bundle. Xylem occupies the center of the vascular bundle. Anatomy Xylem is formed by tracheary elements like tracheids and vessels predominantly.

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Log in ». Terms of use Privacy policy. Transportation of food and nutrients such as sugar and amino acids from leaves to storage organs and growing parts of plant. Bidirectional Moves up or down the plant's stem from "source to sink". Learn about animals, plants, evolution, the tree of life, ecology, cells, genetics, fields of biology and more. A confirmation email has been sent to the email address that you just provided. Check your emails and make sure you click the link to get started on our 6-week course.

Basic Biology: An Introduction. Also available from Amazon , Book Depository and all other good bookstores. Know the answer? Why not test yourself with our quick 20 question quiz. Phloem The phloem carries important sugars, organic compounds, and minerals around a plant.

Sieve-tube members Sieve-tube members are living cells that create chains of cells running the length of the plant. Xylem The xylem is responsible for keeping a plant hydrated.

Tracheids Tracheids are long thin cells that are connected together by tapered ends. Vessel elements Vessel elements are shorter and wider than tracheids and are connected together end-on-end. Xylem and phloem in leaves Photosynthesis in leaves requires a lot of water from the xylem and produces a lot of sugar for the phloem. Vascular bundles from stems meet at the base of the stem to merge with the root stele. Last edited: 26 August Want to learn more?

Unlike xylem, phloem vessels contain cytoplasm, and this goes through holes from one cell to the next. Phloem transports sucrose and amino acids up and down the plant. This is called translocation. In general, this happens between where these substances are made the sources and where they are used or stored the sinks.