ROOTS Secondary Xylem |
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The image at left depicts two secondary xylem vessel members connected at their perforation plates to form a vessel. Xylem vessels transport water and nutrients from the soil to the various parts of the vine. Xylem vessel elements are formed and then go through a process of programmed cell death called apoptosis. Once this process is completed, the vessels are devoid of their contents and are free to function as conducting tubes. |
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Longitudinal Section 400X |
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The secondary vessel elements
in the image of the maceration at left have scalariform pits. The
perforation plates at their ends are simple-showing no perforations. |
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Root Maceration |
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