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Cells of the root tip of a maize plant

Cells of the root tip of a maize plant

B060/0056

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY

Caption

False-colour transmission electron micrograph (TEM) of cells in the root tip of a maize plant, Zea mays. Plant cells are distinct from animal cells in having an additional external envelope, the plant cell wall, outside the plasma membrane. In this micrograph, the cell wall, made of proteins & polysaccharides, appears as the thin layer between the cells. The wall defines the shape of the cell & expands as it grows. The prominent, round organelle in each cell is the nucleus, which contains a smaller, dark-staining nucleolus. The white areas in the cytoplasm are vacuoles. Magnification: x1140 at 35mm size. Green tint ("leech"). Original is BW B215/01M. Reference: MICROCOSMOS, figure 6.1, page 108.

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