Beilstein J. Nanotechnol.2018,9, 175–186, doi:10.3762/bjnano.9.20
vascular bundles, are regarded as paedomorphic tracheids, which are specialised to prevent cell collapse under drought stress and allow for building growth-induced mechanical pre-stresses.
Keywords: hydraulics; mechanical pre-stress; paedomorphosis; self-sealing; wide band tracheids; Introduction
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potential ecological aspects and paedomorphosis.
Results
Anatomy
Figure 2 shows anatomical details of the succulent leaves of D. cooperi. The leaf shape ranges from oval near the base to round at the apex. Cross-sections reveal a centripetal arrangement of five tissue layers, each having a characteristic
tension during ontogeny and which are more efficient in supporting the larger adult woody plant body. However, in some species, adult plants remain locked in the production of initial wide-band tracheid in their wood. This can be interpreted as a case of paedomorphosis [12][13]. In leaves of D. cooperi
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Figure 1: Delosperma cooperi. (a) Flowering plants cultivated outdoors in the Botanic Garden Freiburg, German...