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Samenvatting PPH-10806 Structuur en Functie van Planten Fysiologie

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uitgebreide samenvatting van PPH-10806 Structuur en Functie van Planten het fysiologie gedeelte. Behaalde resultaat: 8.0

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Structuur en Functie van Planten
Fysiologie

Fotosynthese
Fotosynthese  energiehuishouding van plant

Oude theorie fotosynthesereactie
 CO2 + H2O + licht  (CH2O) + O2
 O2 splitst af van CO2
Oude theorie klopt niet  bij fotosynthesereactie wordt water gesplitst
 CO2 + 2H2O + licht  (CH2O) + H2O + O2

Fotosynthese
 Splitsing van water zorgt voor vrijkomen van zuurstof
 Gebruikte CO2 wordt vastgelegd  reductie, kost energie
 6 x fotosynthesereactie = 1 glucose

Licht opvangen  m.b.v. pigmenten in chloroplasten
 Chlorofyl-A
 Chlorofyl-B
 Caroteen
Chlorofyl  absorbeert blauw en rood, weerkaatst groen
Caroteen  absorbeert blauw en groen, weerkaatst oranje

Licht absorberen  elektron naar hoger energielevel  excited state
Terugkeren elektron naar lager energielevel  ground state
 Fluorescentie
o Energie in vorm van warmte wordt vrijgegeven in foton
 Resonance energy transfer
o Energie getransporteerd naar ander pigment
 Elektronenacceptor
o Elektron wordt getransporteerd naar dichtbijgelegen molecuul

Fluorescentielicht  ALTIJD ROOD ONGEACHT KLEUR GEABSORBEERDE LICHT
 Maat voor hoeveelheid energie die niet nuttig gebruikt kan worden
o Meten stress en gezondheid van plant
 Meer fluorescentie  meer stress

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