Plant Structure and Function
Plant Structure and Function
Plant Body
The unique
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
Meristems – region of undifferentiated cells that can
divide rapidly.
Apical meristems – shoots and tip of roots (primary
growth)
Lateral meristems – thickening of the cambium
(secondary growth)
Plant Tissues
Plant Tissues
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
Apical Meristem
Inside the stem
Closer look at leaves
Closer LOOK at Leaves
Leaf veins
Primary structure of roots
Root structures
Root structures
Secondary growth
Secondary grwoth
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
Modified stems
Many plants have modified stem structures that function in storage or
reproduction.
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.
cladodes
Plant Body
The unique
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
Meristems – region of undifferentiated cells that can
divide rapidly.
Apical meristems – shoots and tip of roots (primary
growth)
Lateral meristems – thickening of the cambium
(secondary growth)
Plant Tissues
Plant Tissues
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
Apical Meristem
Inside the stem
Closer look at leaves
Closer LOOK at Leaves
Leaf veins
Primary structure of roots
Root structures
Root structures
Secondary growth
Secondary grwoth
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
Modified stems
Many plants have modified stem structures that function in storage or
reproduction.
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.
cladodes