13) Primary Growth of Plants

13) Primary Growth of Plants - AP Biology Primary Growth of...

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AP Biology Primary Growth of Plants - Main purpose = to elongate the plants vertically - Meristems contribute to the growth of the plants Meristems = any embryonic tissue that generates cells - Especially, apical meristems are involved in the primary growth of plants Apical Meristems = Meristems, located at the tips of plants (shoots and roots) - It occurs in everywhere: roots, stems, and leaves 1) Primary Growth of Roots a) The apical meristem is covered by root cap (a protective coat that covers the apical meristem; secretes polysaccharide lubricate) b) It consists of three parts: zone of cell division, zone of elongation, and zone of differentiation – Figure 1 Zone of cell division = cells (e.g root hairs) are produced from apical meristems Zone of elongation = cells elongate right behind zone of cell division; this enables the roots push deeper into the ground Zone of differentiation (maturation) = cells are differentiated and become functional (distinct) tissues
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13) Primary Growth of Plants - AP Biology Primary Growth of...

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