Download 21.1 Plant Cells and Tissues

Reproductive
Adaptations Contribute to
20.1
21.1 Plant
Cells and Tissues
Angiosperm Success
Anatomy of a Typical Flower
20.1
21.1
Reproductive
Adaptations
Plant
Cells and
TissuesContribute to
Angiosperm Success
Adaptations:
•
•
•
•
Sepals
Petals
Stamen
Carpal/Pistil
20.1
21.1
Plant Cells and Tissues
Adaptations
• Double Fertilization
– Embryo
– Endosperm
Embryo
• Seeds
– Seed coat
– Embryo
– Cotyledon
20.1
21.1
Plant Cells and Tissues
Asexual Reproduction In Angiosperms
• Vegetative Reproduction: dropped stems or shoots that
establish new roots and become clones.
20.2
21.1 Plant Cells and Tissues
KEY CONCEPT
Plants have specialized cells and tissue systems.
20.2
21.1 Plant Cells and Tissues
A Plant’s Roots and Shoots System
• Root system
– Fibrous Root
vs Tap Root
• Shoot system
– Stems
20.2
Tissue
Types
& #2
21.1 Plant
Cells
and#1Tissues
Plant organs are made of three tissue systems.
• Dermal tissue covers the
outside of a plant.
– protects the plant
stem
– secretes cuticle of leaves
– forms outer bark of trees
• Ground tissue is found
inside a plant.
– provides support
– stores materials in roots
and stems
– Photosynthesis (in the
shoot)
leaf
root
Tissueand
TypeTissues
#3
20.2
21.1 Plant Cells
• Vascular tissue: hollow tube shaped, used for transport
– xylem transports water
and minerals
– phloem transports
photosynthetic products
(sugar)
Cell Type
20.2
21.1 Plant Cells
and #1
Tissues
Plant tissues are made of three basic cell types.
• Parenchyma cells are the
most common plant cell
type.
– store starch, oils and
water
– Photosynthesis and
Cellular Respiration
– help heal wounds to
the plant
– have thin flexible walls
& large central vacuole
21.1
20.2 Plant Cells and Tissues
• Collenchyma cells provide support to a growing plant.
– they are strong and flexible.
– celery strings are strands of collenchyma.
– they have unevenly thick cell walls.
20.2
21.1 Plant Cells and Tissues
• Sclerenchyma cells are the strongest plant cell type.
– second cell wall hardened by lignin
– die when they reach maturity
– used by humans to make linen and rope