The simplest ORGAN. ORGANS ORGANS - have one or more FUNCTIONS and composed of SEVERAL TISSUES ROOTS...
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Transcript of The simplest ORGAN. ORGANS ORGANS - have one or more FUNCTIONS and composed of SEVERAL TISSUES ROOTS...
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The simplest ORGAN
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ORGANSORGANS - have
one or more FUNCTIONS and composed of SEVERAL TISSUES
ROOTS are the simplest
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FUNCTIONS of ROOTSANCHORAGE
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FUNCTIONS of ROOTSABSORBING and
CONDUCTING Water and Nutrients
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FUNCTIONS of ROOTSFOOD STORAGE
TaprootsFascicled roots
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FUNCTIONS of ROOTSFOOD STORAGE in Cortex
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FUNCTIONS of ROOTSAll ROOTS are for:
AnchorageAbsorbing and
Conducting Nutrients
Food Storage
Some can REPRODUCE by root cuttings
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CLASSIFICATION of ROOTSBased on
ORIGINATION
PRIMARYSECONDARYADVENTITIOUS
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CLASSIFICATION of ROOTSBased on TYPE of
ROOT SYSTEM
TaprootFibrousFascicled
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ROOT ANATOMYRegion of
Maturation (Differentiation)
Region of Elongation
Meristem Region
Quiescent Zone
Root Cap
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ROOT ANATOMYDicots
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ROOT ANATOMYMonocots
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ROOT ANATOMYSecondary or Lateral root generation
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ROOT PHYSIOLOGYWater and Nutrient
CONDUCTION is comprised of THREE ACTIONS
ROOT PRESSURECAPILLARITYTRANSPIRATION
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ROOT PHYSIOLOGYROOT
PRESSURE
OSMOSIS
Pathway A – Intercellular Spaces
Pathway B – Root Hairs
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ROOT PHYSIOLOGYROOT PRESSURE
Casparian Strip
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ROOT PHYSIOLOGYCAPILLARY ACTION (or Capillarity)
Adhesion Cohesion
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ROOT PHYSIOLOGYTRANSPIRATIONAL
PULL (or Transpiration)
As WATER EVAPORATES or DIFFUSES from the surface of a leaf, and as cells replace water , the continuous loss of water PULLS it up through plant
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SPECIALIZED ROOTS and ASSOCIATIONSPROP ROOTS
CLIMBERS
PNEUMATOPHORES
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SPECIALIZED ROOTS and ASSOCIATIONSEPIPHYTES
CONTRACTILE ROOTS
PARASITIC ROOTS
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ROOT ASSOCIATIONSMYCORRHIZAL
Associations”Fungus Root”MUTUALISTIC
fungus/plant relationship
Helps absorb WATER and NUTRIENTS for PLANT
Plant provides SUGARS for FUNGUS
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ROOT ASSOCIATIONSMYCORRHIZAL Associations
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ROOT ASSOCIATIONSBACTERIAL Associations
MUTUALISTIC bacterial/plant relationship
BACTERIA absorbs NITROGEN from atmosphere, and converts it into AMMONIUM (NH4
-) a NUTRIENT for PLANTS
PLANT provides SUGARS for BACTERIA