BISC208 Lecture Notes - Lecture 5: Vascular Tissue, Endodermis, Plant Stem

• School: University of Delaware
• Department: Biological Sciences
• Course: BISC208
• Professor: Safran Catherine

Document Summary

Domestication via selective breeding (artificial selection) creates new species. Gm: works by inserting foreign plasmid sequences into the chromosomal dna of the host plant. Dermis: epidermis, trichome, guard cells, root hair . Meristem: usually grows at the tip of the plant or the roots. A central vascular cylinder is protected by a concentric single cell layer called epidermis. Endodermis: the central vascular cylinder is protected by a concentric cell layer. Root structure: radial symmetry, made of epidermis, cortex, endodermis, pericycle layer, vascular tissue cylinder. Stem structure: pith (ground tissue; dicots) Primary xylem: stiff fibers in wall of these elements (lignin/structural support: unspecialized parenchyma thin-walled cells = ground tissue. Primary phloem: transports organic compounds and certain materials: sieve-tube elements (living cells, companion cells aid sieve-tube element metabolism, supportive fibers. Leaf structure: from shoot apical meristem. Guard cells stomata (found on stems too) Trichomes hairs (for protection: ground. Parenchyma mesophyll (palisade and spongy parenchyma: vascular.