Claim · model-written summary
Primary walls of angiosperm cells appear formed in specific localized growth regions rather than by plastic extension and apposition.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Verbatim
t0“ANGIOSPERM LEAVES”
e0“the primary walls of angiosperm cells are formed in specific, localized growth regions, rather than by plastic extension and apposition”
Title
DEVELOPMENT OF THE CUTICULAR LAYERS IN ANGIOSPERM LEAVES
R. H. Schieferstein; W. E. Loomis American Journal of Botany 1959. doi:10.1002/j.1537-2197.1959.tb07063.x
Other claims from this paper (8)
- Observation The primary cuticle appears to form rapidly on the walls of any living cell exposed to air.
- Observation Surface wax is present on the mature leaves of about half of the 50 or 60 species studied.
- Observation In young leaves wax is extruded at random through the newly formed cuticle and accumulates in reticulate to semicrystalline patterns.
- Observation No wax pores through the cuticle or primary wall can be observed in electron micrographs of dewaxed mature leaves.
- Observation Wax accumulations on older leaves are generally subcuticular and may involve the entire epidermal wall.
- Association Isolated cuticular membranes from Hedera helix increased slightly in permeability to water with leaf age.
- Association Permeability of Hedera helix cuticular membranes to 2,4-D decreased 50 times with leaf age.
- Observation Enlargement of the outer surface of epidermal cells of leaves occurs at the margins of the surface, so earlier formed cuticle and wax are undisturbed.