Claim · model-written summary
Extended photoperiods increased yields by 15–20%, without statistical significance.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- extended photoperiod treatmentse0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 15–20%e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“extended photoperiod treatments increased shoot fresh weight and yields of tomato plants by, respectively, 40–57% ( P <0.05) and 15–20% ( P >0.05)”
Title
Dominique-André Demers; Martine Dorais; Chris H Wien; et al. Scientia Horticulturae 1998. doi:10.1016/s0304-4238(98)00097-1
Other claims from this paper (15)
- Intervention effect Extended photoperiods increased shoot fresh weight by 40–57%.
- Intervention effect Photoperiods beyond 14 h did not further improve growth and yields.
- Observation Continuous light caused leaf chlorosis after seven weeks.
- Intervention effect Continuous light improved early growth and yield relative to 14 h light.
- Intervention effect Continuous light reduced growth rate later in the experiment.
- Intervention effect At experiment end continuous light generally lowered total growth and yield relative to 14 h light.
- Intervention effect Reducing fruit load increased vegetative growth.
- Intervention effect Reducing fruit load decreased yields.
- Intervention effect Fruit load reduction did not change photoperiod response.
- Intervention effect Photoperiod did not affect leaf mineral composition.
- Intervention effect Continuous light increased leaf starch content.
- Intervention effect Continuous light increased leaf sugar content.
- Intervention effect Fruit pruning did not alter the carbohydrate response to photoperiod.
- Intervention effect Fruit pruning did not affect onset or severity of continuous-light leaf chlorosis.
- Mechanism The authors proposed leaf carbohydrate accumulation rather than sink limitation as the cause of continuous-light growth and yield reductions and chlorosis.