designed by pyeongsug kim ©2009 [email protected]@att.net si session shoots(stem & leaves)...
TRANSCRIPT
Designed by Pyeongsug Kim ©2009 [email protected]
SI session
Shoots(Stem & leaves)
Topic 23, 24
Spring 2010
Dr. Hughey’s Bio 3 (Lab.)Picture from http://www.cactus-art.biz/schede/ALLUAUDIA/Alluaudia_procera/Alluaudia_procera/Alluaudia_procera.htm
Alluaudia procera
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A
BF
G
H
I
C
D
E
A:B:C:D:E:F:G:H:I:
ProtodermLeaf promordiumProcambiumGround meristemBud primordiumApical meristemLeaf traceNodeLeaf trace gap
____- the ground tissue occupying the center of a root or shoot.Pith
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In stems
(Eudicot/Monocot) (Eudicot/Monocot)
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(Eudicot/Monocot) (Eudicot/Monocot)
Stem! Root!
Pith
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(Eudicot/Monocot)(Eudicot/Monocot)
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(Eudicot/Monocot) (Eudicot/Monocot)
From Dr.Hughey’s Bio3 Class slide
From Dr.Hughey’s Bio3 Class slide
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Need to know how to build Dichotomous key ….
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Epidermis in leavesEpidermis in leaves-Stomata (Guard cells) exchange gas water is lost through here. arranged in parallelparallel rowsrows in ________ scattered in ________
monocotsdicots
monocotsdicots
Eudicot- random stomata. Monocot- parallel stomata.From Dr.Hughey’s Bio3 Class slide
monocotsdicots
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-_________ a waterproof layer reducing water loss from the plant surface through Evaporation.
Epidermis in leavesEpidermis in leavesCuticle
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MesophyllMesophyll-Ground tissue -specialized for photosynthesis.
__________________ ~ Rich in chloroplasts ~ Photosynthesis
_________________ ~ less chloroplast than the palisade. ~ many intercellular air spaces between cells. ~interconnected and communicate with the stomata. ~ Allow to access the gases
Palisade parenchyma
Spongy parenchyma
__________-Plants that are adapted to arid habitats
____________- Plants that require a large supply of water or grow wholly or partly submerged in water.
___________- Plants that require an environment that is neither too wet nor too dry.
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Mesophytes
Hydrophytes
Xerophytes
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___________-Ground tissue-Specialized photosynthesis
Mesophyll
________ parenchyma(upper)
________ parenchyma(lower)
PalisadeSpongy
C
D
A B
HGFE
A:B:C:D:E:F:G:H:I:
XylemUpper epidermisPalisade parenchymaSpongy parenchymaLower epidermisStomaPhloemTrichomeBundle sheath
I
Mesophytes!
__________-Large intercellular spaces for buoyancy
__________-Plants that require a large supply of water or grow wholly or partly submerged in water.-Stomata in lower epidermis.
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Hydromorphic leaf
E
F
AB
CD
GH I J
A:B:C:D:E:F:G:H:I:J:
Sclereid Upper EpidermisVein(vascular tissue)StomaPalisade parenchymaSpongy parenchymaTrichomeIntercellular space(buoyant)Lower epidermisBundle sheath
Hydrophyte
__________-Plants that are adapted to arid habitatsXerophyte
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A BC
F G H J
D
E
I
A:B:C:D:E:F:G:H:I:J:
CuticleVein(vascular tissue)Upper epidermisPalisade parenchymaSpongy parenchymaLower epidermisTrichomeGuard cellStomatal cryptsBundle sheath
______________-Thick waxy cuticle, stomatal crypts in lower side
Xeromorphic leaf
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______________the normal separation of the leaf from the stem.
Abscission
_________ layer - Break occur
_________ layer - Forms a leaf scar
Separation
Protective