Summary
Due to recent interest in the significance of multilayered structures (MLSs) and MLS-like structures in green algal and land plant systematics and evolution, the putative MLSs ofTrentepohlia aurea swarmers were re-examined using conventional TEM of serial thin sections, and high-voltage electron microscopy (HVEM) of thick sections. Features not previously reported to occur in trentepohlialean algae include a structure connecting MLSs to adjacent basal bodies, the lamellar nature of the sub-microtubular layer of the MLS, and the presence of appendages on microtubules overlying the lamellar strip. Reasons are given for concluding that the MLSs ofTrentepohlia and other members of theTrentepohliales are possibly homologous to MLSs ofGlaucophyceae and the MLS-like structures ofFriedmannia. It is proposed that increased attention to the details of MLS structure may be crucial to an understanding of the divergence of main lines of green algal evolution.
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Graham, L.E. An ultrastructural re-examination of putative multilayered structures inTrentepohlia aurea . Protoplasma 123, 1–7 (1984). https://doi.org/10.1007/BF01283176
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DOI: https://doi.org/10.1007/BF01283176