Claim · model-written summary
There is a developmental limit to the maximum biomass allotted to stem construction.
- Taxon
- Equisetum hyemale
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Equisetum hyemalee0 - Outcome
- maximum allotment of biomass invested in the construction of stemse5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“vertical stems of Equisetum hyemale”
e5“there is a developmental limit to the maximum allotment of biomass invested in the construction of stems”
Title
SAFETY FACTORS IN VERTICAL STEMS: EVIDENCE FROMEQUISETUM HYEMALE
Karl J. Niklas Evolution 1989. doi:10.1111/j.1558-5646.1989.tb02613.x
Other claims from this paper (5)
- Observation The model predicts that the wall thickness of hollow internodes must be at least 15% of the external shoot radius.
- Observation The model predicts that hollow stems sustain an additional proportion of their own weight.
- Observation Internodal wall thickness is adjusted with increasing stem height, converging on predicted safety limits.
- Association The elastic modulus of stems changes with the ratio of apoplast to symplast areas in transverse sections.
- Mechanism Hollow stems are designed for safety rather than economy in construction.