Transcript SI Powerpoint: Cells and Tissues of Plant - Chemistry-i

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Angiosperms
Cells and Tissues
Topic 21
Spring 2010
Dr. Hughey’s Bio 3 (Lab.)
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Apical
Meristems regions of tissue at the tips of shoots and
______________
roots that forms new cells.
Three Primary meristems
Protoderm, Procambium, and Ground meristem
Three Primary tissues
Dermal tissue, Ground tissue, and Vascular tissue
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Give rise to..
Primary Tissues
Protoderm
Give rise to..
Dermal Tissue
Procambium
Give rise to..
Vascular tissue
Ground meristem
Give rise to..
Ground tissue
3 Primary meristems
Ground tissue
Dermal tissue
Vascular tissue
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Tissue System – Dermal, Vascular, and Ground
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Designed by Pyeongsug Kim, ©2010
Dermal Tissue
1) Epidermis
Cell types - ____________________.
Guard cells & Trichomes
Protection & __________
aeration
Trichomes
Guard cells
Trichomes
_________- A hairlike or bristlelike
outgrowth, as from the epidermis of a
plant.
Stoma
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Vascular Tissue #2
• Phloem- principal food-conducting
tissue in vascular plants; living at
maturity; not lignified.
• Gymnosperm Sieve Elements
– Sieve cell- elongate & tapering; with
sieve areas.
– Albuminous cell- elongate & tapering;
delivers substances to sieve cells.
• Angiosperm Sieve Elements
– Sieve-tube element- elongate &
tapering; with a sieve plate.
– Companion cell- variable; delivers
substances to sieve-tube elements.
From Dr. Hughey’s Bio3 Slide
Vascular Tissue - Xylem & Phloem
Xylem
- (Water-conducting / Food-conducting) tissue
- Tracheary Elements
______________
Tracheid
______________
Vessel element
Pholem
-(Water-conducting / Food-conducting) tissue
- Sieve Elements
______________________
Sieve cell & Albuminous cell in gymnosperm.
____________________________
Sieve-tube element & Companion cell in angiosperm
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Xylem
Pholem
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Pits
Pits
(little dots)
Perforation plate of Vessel element
Xylem / phloem
Tracheid / Vessel element
Found in ….
No!
-Seedless plant ____
No!
-Gymnosperms ____
-Angiosperms Yes!
____
Tracheid & fibers
Xylem / phloem
Tracheid / Vessel element
Found in ….
-Seedless plant Yes!
____
-Gymnosperms Yes!
____
-Angiosperms Yes!
____
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Xylem
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Sieve Elements
Xylem / phloem
Gymnosperms / Angiosperms
Xylem / phloem
Gymnosperms / Angiosperms
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A
Xylem / Phloem
Gymnosperms / Angiosperms
D
B
C
Cross section
A: Sieve-tube elements (mature)
B: Companion cells
C:P-Protein(Phloem-protein)
D:Parenchyma
E: Sieve plate
F: Companion cells
P-Protein(Phloem-protein)
Longitudinal section
E
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F
Ground Tissue
Parenchyma, Collenchyma, &
Sclerenchyma
Parenchyma
-Parenchyma cells
- ______________,
Photosynthesis storage, and secretion
Collenchyma
-Collenchyma cells
-Support
______________________
young growing tissues
Sclerenchyma
- Fibers
________________
and sclereids
-Support (strengthen) and storage.
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Picture from http://www.britannica.com/EBchecked/topic-art/222226/388/Cell-types-and-tissues
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A
B
E
A: Epidermis
B: Cortex
C:Pith (Parenchyma tissue)
D:Vascular bundle
E: Pith rays
Sclerenchyma
C
D
Sclereid
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E
A
B
F
A: Collenchyma
B: Parenchyma
C: Parenchyma
D: Epidermis
E: Collenchyma
F: Vascular bundle
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D
C
A
B
C
D
E
A:Parenchyma
B:Phloem
C:Vascular Cambium
D:Xylem
E:Phloem
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Vascular bundle
Dermal Tissues
Most epidermal cells lack chloroplasts.
Guard cells contain chloroplasts and
regulate gas exchange between the
inside of the leaf and the surrounding
air.
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Tissue System
and Its Functions
Component
Tissues
Dermal Tissue
System
• protection
• prevention of
water loss
Epidermis
Periderm (in older
stems and roots)
Ground Tissue
System
• photosynthesis
• food storage
• regeneration
• support
• protection
Parenchyma tissue
Collenchyma tissue
Sclerenchyma
tissue
Vascular Tissue
System
• transport of water
and minerals
• transport of food
Xylem tissue
Phloem tissue
From http://www.phschool.com/science/biology_place/biocoach/plants/tissue.html
Location of Tissue
Systems
Vascular
Tissue
Xylem Tissue
Phloem Tissue
Function
• Conduct water and
dissolved minerals
• Support
• Conduct food and other
organic substances
Cell Types
Unique to This
Tissue
Tracheids, Vessel members
Companion
cells
Picture from http://www.phschool.com/science/biology_place/biocoach/plants/vascular.html
Sieve-tube
elements
Ground Tissue
Parenchyma
Tissue
Collenchyma
Tissue
Sclerenchyma
Tissue *
Function
• Photosynthesis
• Food storage
• Healing and
tissue
regeneration
• Support in
young stems,
roots, and
petioles
• Rigid support
• Protection
Cell Types in
This Tissue
Parenchyma
cells
Collenchyma
cells
Sclereid cells &
fiber cells
*Some texts include tracheids and vessels as components of sclerenchyma tissue.
Picture from http://www.phschool.com/science/biology_place/biocoach/plants/ground.html
Please, please, please…… Fill in the blank!
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