Title: Lecture 20: Photosynthesis
1 Lecture 20 Photosynthesis
By the end of this lecture you should be able
to Describe photosynthesis as an ecological as
well as a physiological process. Provide an
overview of the mechanics of photosynthesis. Conc
epts and terms light and dark reactions, redox
reactions Discuss anatomical features of leaves
important for photosynthesis. Concepts and
terms leaf anatomy, chloroplast structure,
grana, stroma
Describe the energy transformations in the light
reactions. Concepts and terms light
absorption, chlorophyll, photosystems I and II,
action spectrum, NADPH, ATP, cyclic and
non-cyclic e flow. Describe chemiosmosis. Describe
the Calvin cycle. Concepts and terms RUBISO,
3PG Assigned reading Chapter 10 in the text.
2Figure 10.0 Sunbeams
3Figure 10.1 Photoautotrophs
4Autotroph
From Larcher.
5Photosynthesis and respiration are redox
reactions.
6Average bond energies, kcal/molas found in CO2
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10Figure 10.4 An overview of photosynthesis
cooperation of the light reactions and the Calvin
cycle (Layer 1)
11Figure 10.4 An overview of photosynthesis
cooperation of the light reactions and the Calvin
cycle (Layer 2)
NADP Nicotinamide Adenine Dinucleotide Phosphate
12Figure 10.4 An overview of photosynthesis
cooperation of the light reactions and the Calvin
cycle (Layer 3)
13Photosynthetically active radiation.. 400 to 700
nm.
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16- Non-cyclic electron transport
- Photophosphorylation
17Cyclic electron transport
18Chemiosmosis
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20Figure 10.x1 Melvin Calvin
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22Photosynthesis can be broadly separated into
light reactions - light dependent dark
reactions - light independent
Light reactions are involved in the
oxidation of water to oxygen reduction of NADP
to NADPH and ATP occur in thylakoid
membranes Dark reactions use NADPH and ATP to
fix CO2 into CH2O occur in stroma matrix of
chloroplasts
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