WebbAbstract: Phytochrome is the photoreceptor that controls red light-mediated morphogenesis in higher plants. It exists in two photointerconvertible forms, a red light … WebbPhytochrome is a soluble chromoprotein consisting of the N-terminal photosensory and C-terminal dimerization moieties. Close homologues of plant phytochromes are widely found in prokaryotes. Recently, the crystal structures of the core photosensory module of bacterial phytochromes are resolved.

39.1B: The Phytochrome System and Red Light Response

WebbPhytochrome is a soluble chromoprotein of ∼120 kDa, to which a linear tetrapyrrole chromophore is covalently attached. The holoprotein undergoes photoreversible conversion between two spectrally distinct forms, the far-red light-absorbing form (Pfr) and the red light-absorbing form (Pr). Of these two forms, Pfr is biologically active. Webb31 juli 2003 · Phytochrome is a dimeric chromoprotein which regulates various aspects of plant development from seed germination to flowering. Upon absorption of red light, … tmhain

Dimers of the N-terminal domain of phytochrome B are ... - PubMed

The phytochrome pigment was discovered by Sterling Hendricks and Harry Borthwick at the USDA-ARS Beltsville Agricultural Research Center in Maryland during a period from the late 1940s to the early 1960s. Using a spectrograph built from borrowed and war-surplus parts, they discovered that red light was very effective for promoting germination or triggering flowering responses. The red light responses were reversible by far-red light, indicating the presence of a photoreversible pig… WebbPhytochrome is a conjugated protein as it has chromophore as prosthetic group. It is a photodetector pigment in the plant. It is sensitive to the red and far-red region of the … WebbEfforts to elucidate the mechanism of phytochrome action have focused considerable attention on the physicochemical properties of the chromoprotein and on the molecular … tmhacc