Claim · model-written summary
SAMs of Lycopodiaceae and Isoetaceae with plural initial cells have low PD densities, equivalent to those of seed plants.
- Taxon
- Lycopodiaceae and IsoetaceaeLycopodiaceaeIsoetaceaee0
- Outcome
- PD densitiese0
- Direction
- lowe0
- Comparator
- seed plantse0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Verbatim
e0“SAMs of Lycopodiaceae and Isoetaceae with plural initial cells have low PD densities, equivalent to those of seed plants”
Title
Ryoko Imaichi; Rie Hiratsuka American Journal of Botany 2007. doi:10.3732/ajb.94.12.1911
Other claims from this paper (7)
- Observation Angiosperm and gymnosperm SAMs have low plasmodesmatal densities.
- Observation Among angiosperm and gymnosperm SAMs, there was no difference in plasmodesmatal density between stratified (tunica-corpus) and unstratified structures.
- Observation SAMs of ferns, including Psilotum and Equisetum, have average PD densities more than three times higher than those of seed plants.
- Observation Selaginellaceae SAMs with single apical cells have high PD densities.
- Association PD networks are strongly correlated with SAM organization: SAMs with single and plural initial cells have the fern-type and seed-plant-type PD networks, respectively.
- Observation The two SAM organizations may have evolved separately in lycophytes and euphyllophytes.
- Mechanism The SAM organizations may be associated with gain or loss of the ability to form secondary PD in lycophytes and euphyllophytes.