Please enable JavaScript.
Coggle requires JavaScript to display documents.
CH:10 Photosynthesis (environmental and internal factors (Light: quality,…
CH:10 Photosynthesis
environmental and internal factors
Light: quality, quantity and duration
quality of sunlight= color/wavelengths
quantity of light= brightness
light compensation point= respiration
light csn burn pigments
leaves absorb carbon dioxide
no water= hardly no photosynthesis
energy wasting process= photorespiration
PEP carboxylase
CAM= metabolic adaptation
bacteriochloryphyll
CAM species: lilies, cacti, agaves, grapes, peppers, etc.
light-dependent Reactions
synthesis of ATP :
H2O --> H+ plus OH-
ATP synthase: ATP<--ADP & phosphate
chloroplast, thylakoid. stroma, lumen,
electron transport chain to P700 & P680
production for ATP
energy is transferred to reaction center
chl a to chl b wavelengths= resonance
accessory pigments (carotenoids)
photosynthetic pigments
#
350nm tp 750nm= photosynthesis for plants
electromagnetic radiation spectrum
Photosynthesis
photosystem II
Plat uses H+ and discards O2
water breaks down in H+
O2 discarded through stomata
P680
backeard process of photosystem I
photosystem I
strong reducing agent
protein in the thylakoid membrane
absorbed in membrane bound
P700=red light at 700nm
The Stroma Reaction
carbon dioxide to carbohydrate in stroma
3-phosphoglycerate (PGA)
RUBISCO= 2 protein subunits
without RUBISCO= no life
carbon is reduced and energized
anabolic metabolism
anabolism
short term storage: ATP & NADPH
intermediate storage: sugar is moved cell to cell
long term storage: starch, lipids
anabolic synthesis: gluconeogenesis
amylose and amylopectin are starch
starch converts to sucrose
energy and reducing power
Energy Carriers
photosynthesis
light energy --> chemical energy
energized pigments into endergonic
pigments receive light
produce ATP
each molecule is recycled
photophosphorylation, chloroplast in light
other Electron carriers
cytochromes small proteins
cytochromes are intrinsic membrane protein
nonremoval unless membrane destroyed
Plastoquinones pick up 2e- and bind 2p+
plastocyanin example copper
photosynthesis: carbon dioxide+water=carbohydrate
Reducing power
oxidized ex. carbon dioxide
oxidized compound= oxygen
reduced compound= hydrogen
NAD+ and NADP+=oxidizing agents
#
tendency to accept or donate electrons
