Apical stem of pondweed. Coloured Scanning Electron Micrograph (SEM) of the apical stem of the pondweed, Elodea sp. The tip of the stem (at top) is rounded; it is in this region that growth occurs with subsequent elongation of the stem. Cell detail can be seen. Behind the apical tip are developing whorls of young leaves. Elodea sp. is an aquatic plant which inhabits ponds and larger bodies of freshwater. Both the stem and leaves may grow completely submerged underwater, although the solitary female flower is raised to the surface by a long stalk to enable pollination to take place. Magnification: x50 at 6x7cm size.
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