Claim · model-written summary
Etioplasts from pcd1 seedlings metabolized biliverdin IX alpha to phytochromobilin.
- Taxon
- pea
Lathyrus oleraceust0 - Material
- pcd1e0
- Organ / stage
- etioplaste0
- Outcome
- metabolize biliverdin (BV) IX[alpha]e0
Not reportedGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“etioplast preparations from pcd1 seedlings can metabolize biliverdin (BV) IX[alpha] but not heme to phytochromobilin”
t0“pea”
Title
The Phytochrome-Deficient pcd1 Mutant of Pea Is Unable to Convert Heme to Biliverdin IX[alpha].
J. L. Weller; M. J. Terry; C. Rameau; et al. The Plant Cell 1996. doi:10.1105/tpc.8.1.55
Other claims from this paper (15)
- Observation The pea mutant selected under white light had pale color and elongated internodes.
- Observation Light-grown pcd1 plants had yellow-green foliage.
- Observation Light-grown pcd1 plants had reduced chlorophyll content.
- Observation Light-grown pcd1 plants had an abnormally high chlorophyll a/b ratio.
- Observation Etiolated pcd1 seedlings were developmentally insensitive to far-red light.
- Observation Etiolated pcd1 seedlings showed a reduced response to red light.
- Observation Etiolated pcd1 seedlings had no spectrophotometrically detectable phytochrome.
- Observation Phytochrome A apoprotein was present at wild-type level in etiolated pcd1 seedlings.
- Intervention effect Red light did not deplete phytochrome A apoprotein in etiolated pcd1 seedlings.
- Observation Crude phytochrome preparations from etiolated pcd1 tissue lacked spectral activity.
- Intervention effect Phycocyanobilin assembly yielded a spectrum characteristic of an apophytochrome-phycocyanobilin adduct in pcd1 preparations.
- Mechanism The pcd1 phenotype was attributed to deficient phytochrome chromophore synthesis.
- Observation Etioplasts from pcd1 seedlings could not metabolize heme to phytochromobilin.
- Mechanism pcd1 plants were severely impaired in converting heme to biliverdin IX alpha.
- Mechanism Heme conversion to biliverdin IX alpha was inferred to be enzymatic and required for phytochrome chromophore synthesis and normal photomorphogenesis.