title: Proceedings: Threshold-dependent phenomena in photomorphogenic processes.
mesh_terms: D002734:Chlorophyll / Q000096:biosynthesis; D003580:Cytochromes / Q000378:metabolism; D004789:Enzyme Activation; D008027:Light; D010788:Photosynthesis; D010944:Plants / Q000378:metabolism*; D013997:Time Factors
chemical_list: D003580:Cytochromes; D002734:Chlorophyll