Stems allow water and minerals to move from the roots to the leaves and food (glucose) to go from the leaves to the roots . Hold up the leaves which undergo photosynthesis (requiring water and producing glucose).
Roots & stems moodle
Roots & Stems Notes
Cross Section of Roots• Epidermis – Protects against water loss – Outer covering• Cortex – Storage of photosynthetic products – Active in the uptake of water and minerals• Pith – Centermost region of the root
Cross Section of Roots• Endodermis – Prevents water from getting into the middle of roots – Water can only enter through root hairs• Pericycle – Allow for lateral root growth – Outermost layer of the central vascular system
Cross Section of Stem3. Meristematic Tissues – Apical meristem (1° - increase height of plant) – Lateral meristem (2° - increase width of plant) – Vascular cambium • Produces more xylem towards the inside and more phloem towards the outside – Cork cambium • Produces more cork and cortex
Cross Section of Stem4. Storage Tissues – Cortex (only found in dicot stems) – Pith (found in both dicot & monocot stems)