meristems Flashcards
3 basic types of plant tissues
- dermal tissue
- ground tissue
- vascular tissue
dermal tissue
outer covering against physical and pathogenic agents + prevents water loss
ground tissue
thin walled cells for storage, photosynthesis, support and secretion
vascular tissue
Xylem + Phloem; used for transport of water, minerals, nutrients and provide support
MERISTEMATIC TISSUE:
derived of aggregates of small cells with the same function as stem cells; undifferentiated and used for growth
apical meristems
Differentiated based on position in plant (primary meristem)
Occurs at roots and stems
Shoot Apex: apical meristem and surrounding tissue which uses mitosis and cell division
Stem growth increases with light and carbon dioxide exposure
lateral meristems
Growth in plant thickness (secondary growth)
Occurs at cambium, often in trees + shrubs (woody plants)
Vascular Cambium: produces secondary vascular tissue
Cork Cambium: produces cork cells of outer bark ( in trees)