title: Light harvesting and chloroplast electron transport in NADP-malic enzyme type C4 plants.
abstract: The structure of thylakoids in chloroplasts and the organization of the electron transport chain changed dynamically during the evolution of C4 photosynthesis, especially in the nicotinamide adenine dinucleotide phosphate (NADP)-malic enzyme type C4 species. Stacked grana membranes are strongly reduced in the bundle sheath chloroplasts of these plants, where photosystem II activity is diminished and cyclic electron transport around photosystem I mainly occurs. This change optimizes the ATP/NADPH production ratio in bundle sheath chloroplasts to drive the metabolic cycle of C4 photosynthesis. This review summarizes the current model of light harvesting and electron transport in the NADP-malic enzyme type C4 plants and discusses how it changed during the evolution of C4 photosynthesis.
authors.affiliation: Department of Bioscience, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan. Electronic address: munekage@kwansei.ac.jp.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Nakajima Munekage
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D002736:Chloroplasts / Q000378:metabolism*; D004579:Electron Transport / Q000502:physiology; D008291:Malate Dehydrogenase / Q000378:metabolism*; D009249:NADP / Q000378:metabolism; D010788:Photosynthesis / Q000502:physiology; D045331:Photosystem I Protein Complex / Q000378:metabolism
chemical_list: D045331:Photosystem I Protein Complex; D009249:NADP; D000255:Adenosine Triphosphate; D008291:Malate Dehydrogenase; C031917:malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+)