Claim · model-written summary
Grain 15N concentration was lower than that of the whole panicle by about 10 to 15%
- Taxon
- Oryza sativa
Oryza sativae0 - Organ / stage
- grainse6
- Outcome
- concentrations of 15N in the grainse6
- Direction
- lowere6
- Value
- about 10 to 15%e6
- Comparator
- whole paniclee6
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Translocation and distribution of nitrogen top-dressed at early ripening stage in rice plant (Oryza sativa L. cv Chyukyoasahi) were studied by using 15N as a tracer.”
e6“The concentrations of 15N in the grains were lower than that of the whole panicle about 10 to 15% during a period when active absorption and translocation of top-dressed nitrogen was occurring. Moreover, increasing rate of 15N in whole panicle exceeded that in the grains during early stage.”
Title
Kunio ARAI; Yasuhiro KONO Japanese Journal of Crop Science 1980. doi:10.1626/jcs.49.175
Other claims from this paper (16)
- Observation After top-dressing, 15N was detected in culms, leaf sheaths and panicle by 3 hr and in leaf blades 3 hr later
- Association 15N in these organs increased markedly up to 48 hr after top-dressing
- Association 15N in culms decreased after 48 hr following top-dressing
- Association 15N in leaf sheaths decreased after 72 hr following top-dressing
- Association 15N in leaf blades decreased after 96 hr following top-dressing
- Association 15N in panicle continued to increase during the experimental periods
- Observation Retranslocation of incorporated 15N into leaf blades began between 96 hr and 120 hr after top-dressing
- Mechanism The 15N in panicle at 72 hr (about 25% of total nitrogen) was likely transported directly from roots rather than from leaf blades
- Observation Much of the top-dressed 15N was distributed to early developing grains on each primary branch
- Observation The 15N distribution pattern among primary branches was coincident with the spikelet differentiation order
- Observation 15N was incorporated into grains on top and middle primary branches by 3 hr after top-dressing
- Observation 15N was incorporated into grains on the bottom primary branch at 6 hr after top-dressing
- Observation Percentages of total nitrogen translocated to grains of all primary branches showed little difference until 120 hr
- Association After 120 hr the 15N percentage of newly incorporated nitrogen decreased in grains on the bottom primary branch
- Association The increasing rate of 15N in the whole panicle exceeded that in grains during early stage
- Mechanism Some nitrogen transported directly from roots to panicle is incorporated into rachis, rachis-branches and husks before retranslocation to growing grains