Claim · model-written summary
Reduced illumination lowered leaf density.
- Taxon
- H. mantegazzianum
Heracleum mantegazzianume1 - Treatment
- decreased illumination to 20 µmol/(m2 s) PARe0
- Outcome
- leaf densitye0
- Direction
- reducinge0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants adapted to decreased illumination to 20 µmol/(m2 s) PAR (summer period modeling) by lengthening petioles, reducing leaf density, and increasing the size of the light-harvesting complex of leaf pigments”
e1“Growing H. mantegazzianum at an illumination of 250 µmol/(m2 s) PAR (spring period modeling) showed that during the initial stage of juvenile growth”
Title
I. V. Dalke; R. V. Malyshev; Yu. A. Smotrina; et al. Russian Journal of Ecology 2025. doi:10.1134/s1067413624602732
Other claims from this paper (9)
- Observation At 250 µmol/(m2 s) PAR, juvenile growth rate was 80 mg/g dry mass day.
- Observation At spring light levels, most biomass was allocated to leaves.
- Observation At spring light levels, net photosynthesis was high.
- Intervention effect Reduced illumination lengthened petioles.
- Intervention effect Reduced illumination enlarged the leaf pigment light-harvesting complex.
- Intervention effect Light limitation reduced relative growth rate to 14 mg/(g dry mass day).
- Intervention effect Restored light activated growth.
- Intervention effect Restored light promoted storage of plastic substances in underground organs.
- Mechanism Authors interpret seasonal structural and functional changes as efficient light use in spring and autumn and lower metabolic activity in summer shade.