Claim · model-written summary
The mature bark of E. capensis shows conspicuous radial expansion of secondary phloem by periclinal divisions of axial parenchyma (proliferation tissue), not reported elsewhere.
- Taxon
- E. capensis
Ekebergia capensise0 - Organ / stage
- mature barke0
- Outcome
- conspicuous radial expansion of secondary phloeme0
- Qualifier
- which has not been reported elsewheree0
Verbatim
e0“The mature bark of E. capensis shows conspicuous radial expansion of secondary phloem by periclinal divisions of axial parenchyma (proliferation tissue), which has not been reported elsewhere”
Title
Ekaterina Kotina; Mariam Oyefunke Oyedeji-Amusa; Ben-Erik Van Wyk; et al. Trees 2025. doi:10.1007/s00468-025-02661-7
Other claims from this paper (7)
- Observation The studied South African Meliaceae species share subepidermal initiation of periderm, phloem fibers and compound sieve plates.
- Observation All studied species share stretching bark showing conspicuous expansion without regular shedding.
- Mechanism Continuity of the stretching bark is maintained by anticlinal divisions of phellogen cells and by the formation of expansion cracks.
- Observation Lenticels, found in all studied taxa except Trichilia, are derived from non-disrupted periderm, unlike expansion cracks.
- Association Reticulate fracturing of mature bark in Ekebergia and Trichilia is presumably associated with elastic parenchymatous layers covered by a rigid periderm.
- Mechanism The authors hypothesize that elastic layers redistribute the stressing forces of radial wood increment into tensile forces stretching the periderm, which cracks vertically, horizontally and diagonally.
- Observation Diagnostic bark characters were revealed that identify the studied taxa.
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Spodoptera frugiperda