BISC 1414 Chapter Notes - Chapter 35: Plant Stem, Gas Exchange, Osmosis
12 Jul 2018
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They enclose the shoot apical meristem, which gives rise to leaves, buds, and all primary tissue of the stem. 10: water storage in cacti, carbohydrate storage in some food plants, thorns that reduce herbivory (eating of plants, slide of a cross section through the herbaceous dicot stem. They become vertically aligned to form sieve tubes, and their cytoplasm is interconnected through sieve plates located at the ends of the cells: sieve plates are not usually seen in cross sections. 13: companion cells, which are small, nucleated parenchyma cells connected to sieve-tube cells by means of cytoplasmic strands, xylem tissue is made up of two cell types, tracheids, which are elongated, thick-walled cells with closed, tapered ends. Dead at functional maturity, and their interior spaces are interconnected through pits in the cells walls: vessel elements. Which are cylindrical cells that are large in diameter and dead at functional maturity.
