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Results 1 - 10 of 11 > >>
EC Number
General Information
Commentary
Reference
malfunction
a PORA null mutant (porA-1) and PORA RNAi lines display severe photoautotrophic growth defects, which can be partially rescued on sucrose-supplemented growth media. Elimination of PORA during skotomorphogenesis results in reductions in the volume and frequency of prolamellar bodies, and in photoactive Pchlide conversion; it is shown that an Arabidopsis thaliana porB-1 porC-1 double mutant can be functionally rescued by the addition of ectopically expressed PORA, which suffices in the absence of either PORB or PORC to direct bulk chlorophyll synthesis and normal plant development
malfunction
an enzyme-less mutant grows photoautotrophically in moderate light and contains a maximum of 20% of the wild type chlorophyll level
malfunction
it is shown that a porA-1 null mutant (porA mutant) carries a second dissociation insertion in another gene closely linked to the PORA gene that is expected to affect the phenotype of the porA mutant
malfunction
map-based cloning of the faded green leaf (fgl) locus in Oryza sativa is performed, and reveals that fgl harbors a 1-bp deletion in the coding region of OsPORB, resulting in a frameshift mutation and premature translational termination. Mutant is complemented by OsPORB
malfunction
overexpression of PORC in Arabidopsis thaliana reduces the accumulation of protochlorophyllide in high light-grown plants that results in minimal generation of 1O2 and plants are protected from 1O2-mediated oxidative damage caused by high light. PORC overexpression protects the plants from oxidative herbicidal action of 5-aminolevulinicacid. Overexpression of PORC results in coordinated upregulation of gene/protein expression of several Chl biosynthetic pathway enzymes resulting in enhanced Chl synthesis in light-grown plants
malfunction
RNAi based simultaneous silencing of all forms of light-dependent NADPH:protochlorophyllide oxidoreductase genes results in the accumulation of protochlorophyllide in tobacco
physiological function
in leaf of etiolated seedlings, prolamellar bodies are smaller in the etioplasts of mutant plants than in the wild type. In field-grown seedlings, the chloroplasts in the light-green sectors of mutant leaves exhibit decreased thylakoid stacking with a few plastglobules. PorB is essential for both prolamellar bodies and photoactive protochlorophyllide formation in dark conditions for light-dependent chlorophyll synthesis; low levels of isoform PorA are sufficient for leaf greening in rice, even in the absence of isoform PorB activity
physiological function
isoform POR1 supports photoacclimation, whereas isoform POR2 is responsible for daily chlorophyll synthesis
physiological function
LHPP (light-harvesting POR:Pchlide complexes) assembly is indispensable for barley POR functions and seedling greening
physiological function
OsPORA mainly functions in the early stages of leaf development; OsPORB is essential for maintaining light-dependent chlorophyll synthesis throughout leaf development, especially under high-light conditions
Results 1 - 10 of 11 > >>