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LM of a section through a lime tree stem

LM of a section through a lime tree stem

B725/0199

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Credit

RICHARD KIRBY, DAVID SPEARS LTD / SCIENCE PHOTO LIBRARY RICHARD KIRBY, DAVID SPEARS LTD / SCIENCE PHOTO LIBRARY

Caption

Light micrograph of a transverse section through a six year old lime tree (Tilia sp.) stem. The image shows the pith (dark, centre), six annual rings of xylem (multicoloured area surrounding pith) & an outer layer (cortex) containing roughly-triangular areas of phloem (green), striped with pink phloem fibres. The xylem is composed of vertical, tube- like cells which conduct the sap upwards from the roots. It contains a radiating system of vascular rays (dark lines), which supply it with nutrients. The phloem is responsible for the distribution of the carbohydrates produced by photosynthesis in the leaves. Magnification: x3 at 35mm size.

Release details

Model release not required. Property release not required.

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