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Plant Structure and Function: Roots Monocot Root Dicot Root Cortex Pericycle Epidermis Mag: 100X Mag: 400X Mag: 100X Vascular Tissue: Xylem Phloem Mag: 400X How does the root control movement of materials into the vascular tissue? Epidermis Cortex Endodermal Cells Casparian Strip Wax coated cells that blocks water And forces materials to move through the endodermal cells Root Hairs Path of absorbed solutes Xylem cells Comparison: Actual root tip to diagram Mag. 40x Vascular tissue Pericycle Endodermis, (layer of cells outside the pericycle) Apical meristem Root Cap Mag. 40x Mag 100x Corn Root Tip Apical Meristem Area of Cell division Root cap Dividing cells What stage of mitosis are these in? Epidermis Mag. 400x Wheat Root Hairs Epidermal Cell with root hair extension Mag. 100x Root hair Lateral Root Growth Mag 100x Epidermal cell Root Hair Mag 400x Lateral roots beginning to grow from the pericycle Pericycle Air,Water and Soil Root Adaptations Multiple layers of cells make up the epidermis. Which plant would need extra protection? No Epidermis, has cells that store air. Which plant would need a supply of air? One layer of cells in the Epidermis Rhizobium Root Nodule Which part is the root cross section and which is the bacteria nodule? Nodule, (Lacks vascular tissue) What structures give away the answer? Root(Notice Vascular Tissue) Mag. 100x
