BIOL-1507EL Lecture Notes - Lecture 9: Vascular Bundle, Vascular Plant, Endodermis

• School: Laurentian
• Department: Biology / Biologie
• Course: BIOL-1507EL
• Professor: Nasserulla

Document Summary

Cross section of root in primary growth dicot monocot. E pidermis (i ncluding root hairs : a single layer of cells covering the root. Water and minerals absorbed by plants, through the epidermis, and root hairs greatly increases the surface area of the epidermis: the region between the epidermis and the vascular cylinder. The ground tissue of the cortex, parenchyma, which function in storage. In some species the cortex may include collenchyma mostly below the epidermis. E ndodermis: the inner most layer of the cortex, endodermal cells are with suberin band, beneath the endodermis, a layer of cells, from which lateral root will develop. In most dicot roots the stele or the vascular cylinder form a solid core of xylem and phloem. The xylem radiates from the center with the phloem developing in the wedge between the spokes. In many monocots roots the vascular tissue consists of central core parenchyma (pith) surrounded by alternating rings of xylem and phloem (ex.