DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Asparagus stem tip. Light micrograph of a section through the tip of a narrow-leaved asparagus (Asparagus tenuifolius) stem. At the tip of the shoot is the apical meristem (top), which produces cells by mitosis (cell division). Lower down on the stem are primordia (red bumps), which lead to axillary buds and leaves. The apical meristem contains a core of ground tissue and procambium strands (longitudinal red strikes). Magnification: x4 when printed 10 centimetres wide.
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