Primary Root Tissues and Structure

Primary Root Tissues and Structure - Primary Root Tissues...

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Primary Root Tissues and Structure The organization of tissues in the primary root is simpler than in the primary stem because no leaves  are produced on the roots and, consequently, there is no need to connect the vascular system  laterally to offshoots. The primary body, produced by the three primary meristems, consists of a  central cylinder of vascular tissue, the  stele , surrounded by large storage parenchyma cells—the  cortex —on the outside of which lies a protective layer of cells—the  epidermis Epidermis The root hairs of the young epidermal cells vastly increase the surface area through which  movement of materials can occur. The thread-like hairs are simply enlargements of the protoplast  that extend outward into the soil. They have little wall material and are extremely fragile and easily  broken. The root epidermis of some plants is covered by a thin, waxy 
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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