click below
click below
Normal Size Small Size show me how
Photosynthesis Rxns
For 330 Photosynthetic reactions from Chapin et al 2011
Term | Definition |
---|---|
Carbohydrates | Any of a group of organic compounds that includes sugars, starches and celluloses that are produced by photosynthetic plants and contain only carbon, hydrogen, and oxygen in the ratio 1:2:1. |
Carbon fixation reaction | Those reactions in photosynthesis that use the products of the light-harvesting reactions to reduce CO2 to sugars; also termed light-independent reactions or dark reactions. |
Carboxylase | Enzyme that catalyzes the reaction of a substrate with CO2. |
Chlorophyll | Green pigment involved in light capture by photosynthesis. |
Chloroplast | Organelles that carry out photosynthesis. |
Gross primary production | Net carbon input to ecosystems, i.e., net photosynthesis expressed at the ecosystem scale (g C m–2 yr–1). |
Irradiance | Radiant energy flux density received at a surface, i.e., the quantity of radiant energy received at a surface per unit time. |
Light-harvesting reaction | Reactions of photosynthesis that transform light energy into chemical energy; also termed light-dependent reactions, or light reactions. |
Mesophyll cells | Photosynthetic cells in a leaf. |
Net photosynthesis | Net rate of carbon gain measured at the leaf level. |
Oxygenase | Enzyme that catalyzes a reaction with oxygen. |
Photorespiration | Production of CO2 due to the oxygenation reaction catalyzed by Rubisco; a process that recovers most products of the oxygenase activity of Rubisco. |
Photosynthesis | Biochemical process that uses light energy to convert CO2 to sugars; synonymous at the ecosystem scale with gross primary production. |
Rubisco | Ribulose bisphosphate carboxylase; photosynthetic enzyme that catalyzes the initial carboxylation in C3 photosynthesis. |