organization of tissues in flowering plants is part of the reason why they are the dominant group of the plant kingdom.
Monocots and Dicots
Meristems – region of undifferentiated cells that can
Apical meristems – shoots and tip of roots (primary
Lateral meristems – thickening of the cambium
Xylem – conducts water and mineral ions; fluids can move laterally and vertically.
Tracheids – dead at maturity
Vessel members – dead at maturity Phloem – conducts sugars and organic solutes
Sieve tubes – alive at maturity; distributes sugars all throughout the plant.
Primary Structure of shoots
Inside the stem
Closer look at leaves
Closer LOOK at Leaves
Primary structure of roots
Structure of wood
Tree rings and old secrets
Tree rings are used to estimate average annual rainifall, Date archeological ruins, gather evidence of wildfires, floods,
Landslides and glacier movements. Tree rings and old secrets
Many plants have modified stem structures that function in storage or
STOLONS – also called runners; may look like roots but they have nodes.
Rhizomes and bulbs
Fleshy, scaly stems that typically grow under the soil. It is the main stem of the plant and as a primary
A underground stem encases in overlapping layers of thickened modified leaves called
Corms and tubers
A thickened underground stem that stores nutrients.
Unlike bulbs, a corm is solid rather than layered.
It has a basal plate for
Thickened portions of underground stolons, primary storage of tissues.
They do not have basal plate like corms and bulbs.