Claim · model-written summary
Relative growth rates of internode length and diameter were negatively correlated with the volumetric solid fraction of the internode.
- Taxon
- Xanthium canadense
Xanthium strumarium var. canadensee1 - Organ / stage
- internodee0
- Outcome
- Relative growth rates of internode length and diametere0
- Direction
- negatively correlatede0
- Qualifier
- volumetric solid fraction of the internodee0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative growth rates of internode length and diameter were negatively correlated to the volumetric solid fraction of the internode”
e1“Xanthium canadense plants were grown either solitarily (S-plants) or in a dense stand (D-plants) until flowering”
Title
Stem extension and mechanical stability of Xanthium canadense grown in an open or in a dense stand
Ryoji Watari; Hisae Nagashima; Tadaki Hirose Annals of Botany 2014. doi:10.1093/aob/mcu088
Other claims from this paper (13)
- Intervention effect Internodes were longer in dense-stand Xanthium canadense plants than in solitary plants.
- Intervention effect Basal diameter did not differ significantly between dense-stand and solitary Xanthium canadense plants.
- Intervention effect Internode dry mass density was higher in solitary than in dense-stand Xanthium canadense plants.
- Intervention effect Young's modulus of elasticity and breaking stress were higher in dense-stand than in solitary Xanthium canadense plants.
- Observation Young's modulus of elasticity and breaking stress were higher in lower metamers of Xanthium canadense.
- Association Within a stand, Young's modulus and breaking stress were positively related to internode dry mass density in Xanthium canadense.
- Intervention effect The buckling safety factor was higher in solitary than in dense-stand Xanthium canadense plants.
- Observation Dense-stand Xanthium canadense plants approached the buckling limiting value of 1.
- Intervention effect Lateral wind force resistance was higher in solitary than in dense-stand Xanthium canadense plants.
- Observation Lateral wind force resistance increased with growth in solitary Xanthium canadense plants.
- Mechanism Critical buckling height increased with height growth, mainly through stem stiffness and diameter and a lower crown/stem mass ratio.
- Mechanism Lateral wind force resistance was enhanced by increased tissue strength and diameter in Xanthium canadense.
- Mechanism Increasing tissue stiffness and strength with height growth plays a role in keeping a safety margin against mechanical failure in Xanthium canadense.