Control of chloroplast formation by light.
Light controls the formation of plastid ultrastructure and the synthesis of chlorophyll, plastid membrane constituents and Calvin cycle enzymes. A respective light-mediated regulation of the genetic apparatus in the nucleus and the plastid compartment has been reported. Three photoreactions are involved in the regulation: (1) the protochlorophyll (ide) leads to chlorophyll (ide) a photoconversion, (2) the formation of physiologically active phytochrome and (3) light absorption by a blue light receptor (cryptochrome). The chloroplast formation in higer plants is chiefly controlled by active phytochrome, while in lower plants cryptochrome is the prevailing regulatory factor.
D002734:Chlorophyll / Q000096:biosynthesis; D002736:Chloroplasts / Q000502:physiology / Q000528:radiation effects* / Q000648:ultrastructure; D008027:Light; D008563:Membrane Lipids / Q000378:metabolism; D008565:Membrane Proteins / Q000096:biosynthesis; D010788:Photosynthesis; D010940:Plant Proteins / Q000096:biosynthesis; D010944:Plants
D008563:Membrane Lipids; D008565:Membrane Proteins; D010940:Plant Proteins; D002734:Chlorophyll