Claim · model-written summary
Alburnous matter is apparently deposited by a fluid descending from the leaves that secretes through the bark.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Verbatim
t0“the alburnum of trees”
e3“the alburnous matter being apparently deposited (as I have endeavoured to prove in former memoirs) by a fluid which descends from the leaves, and subsequently secretes through the bark”
Title
XX. On the origin and office of the alburnum of trees
Thomas Andrew Knight Philosophical Transactions of the Royal Society of London 1808. doi:10.1098/rstl.1808.0021
Other claims from this paper (4)
- Observation In succulent horse chestnut shoots, alburnum is deposited in ridges beneath the cortical vessels.
- Observation The number of alburnum ridges at the base of each leaf corresponds accurately to the number of leaf-trace apertures through which vessels pass into the bark.
- Mechanism The bark deposits the alburnous matter, according to the earlier experiments the author cites.
- Mechanism The alburnous tubes more probably retain fluid as reservoirs than afford a passage upwards.