ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Maize root. Polarised light micrograph of a section through the root of a maize plant (Zea mays) showing a vascular cylinder. The cylinder is comprised of a central cluster of parenchyma cells, surrounded by fused vascular bundles and the endodermis. The largest vessels seen here are metaxylem, part of the xylem tissue in the vascular bundles. Xylem transports water and mineral nutrients from the roots throughout the plant, while phloem, the other component of the bundles, transports carbohydrates and plant hormones. Magnification: x8.
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