Claim · model-written summary
Chloroplast number rose linearly with daily light to a saturation of 250 J d−1.
- Taxon
- Spinach
Spinacia oleraceat0 - Treatment
- daily quantity of lighte0
- Outcome
- chloroplast number per celle0
- Direction
- increaseinferrede0
- Value
- 250 J d−1e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a linear relationship occurring between chloroplast number per cell and the daily quantity of light given to discs up to a saturating value of 250 J d−1.”
t0“Spinach”
Title
Factors Affecting Chloroplast Replication in Spinach
J. V. POSSINGHAM; JENNIFER W. SMITH Journal of Experimental Botany 1972. doi:10.1093/jxb/23.4.1050
Other claims from this paper (10)
- Observation Chloroplast number per cell increased logarithmically over seven days.
- Observation Replication proceeded similarly in cultured discs and intact leaves.
- Intervention effect Cytokinins did not affect chloroplast replication.
- Intervention effect Cytokinins stimulated fresh-weight growth of discs.
- Association Chloroplast replication was optimal at 25 °C.
- Association Chloroplast size was maximal at 12 °C.
- Intervention effect Light stimulated chloroplast replication.
- Intervention effect Daylength did not affect chloroplast formation.
- Association Chloroplast number and cell size were generally related, without evidence of causality.
- Association Events preceding replication may progress at similar rates in light and dark.