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Energy Metabolism: Photosynthesis - Coggle Diagram
Energy Metabolism: Photosynthesis
Energy & reducing power :recycle: :
Reducing power
Ability of an electron carrier to force electrons onto another compound
6CO2 + 6H20 + sunlight
Other electron carriers
Cytochromes
Small electron carriers that contain iron
Plastoquinones
Class of lipid soluble electron carrier
Plastoyanin
Copper containing electron carrier
Energy carriers
Process that converts light energy to a chemical energy
Photosynthesis
:check:
Light dependent reactions
The set of reactions directly driven by light (also called the thylakoid reaction)
The stroma reactions
Known as "the dark reactions" ATP & NADPH interact with carbon dioxide & actually produce carbohydrate
Calvin- Benson cycle or C3 cycle
Reactions take place in the stroma, mediated by enzymes that are not bound to thylakoid membranes
Anabolic metabolism
Large molecules are constructed from the smaller ones
ATP & NADPH can be used within the cell & last only briefly
The simple sugar glucose & disaccharide sucrose are stable enough to be moved from cell to cell
Is the process that uses light energy to synthesize something, can be applied to many different reactions
Requires sunlight, carbon dioxide, and water as substances to produce oxygen, G3P
Environmental & inter factors
Light :
Light has three very important properties
Quality
Refers to the spectrum of light available to a plant
Leaves at the tops of trees are typically are exposed to the full spectrum where as the leaves that are lower receive light that has been depleted of red and blue wavelengths
quantity
Refers to the lights brightness or intensity this is affected by several factors
duration
Refers to how long the light will be available to the plant
Leaf structure
Helps the plant minimize water loss, absorb carbon dioxide & reduce external surface area by training photosynthesis to reduce external surface area by cylindrical leaves
Water
The amount of water availabe greaty affects photosynthesis
Most plants keep their stomata open during the day, permitting entry of carbon dixide
At night carbon dioxide cannot be used and the stomata are closed
C4 Metabolism
The ratio of the amount of carbon dioxide fixed by photosynthesis compared to the amount of water lost by transpiration
A set of metabolic reactions in which carbon dioxide is fixed temporarily into organic acids that are transported to bundle sheaths where they release the carbon dioxide and C3 photosynthesis
Metabolism is mechanism by which carbon dioxide is absorbed, transported through, and concentrated in a leaf
Acid metabolism & Crassulacean
Is a second metabolic adaptation that improves conservation of water while permitting photosynthesis
This metablim is selectively advantageous in a very hot dry climate where survival rather than rapid growth is most important
Synthesis of ATP
Is the transfer of electrons from the intermembrane space, through the inner membrane back to the matrix. The combination provides energy for ATP to be made
Chemiosmotic phosphorylation Is the synthesis of ATP from ADP & phosphate using the energy of an osmotic gradient of electron charge
