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@ARTICLE{Jeon:52809,
      author       = {Jeon, S. L. and Hegewald, E.},
      title        = {{A} revision of the species {D}esmodesmus perforatus and
                      {D}. tropicus ({S}cenedesmaceae, {C}hlorophyceae,
                      {C}hlorophyta)},
      journal      = {Phycologia},
      volume       = {45},
      issn         = {0031-8884},
      address      = {Lawrence, KS},
      publisher    = {Soc.},
      reportid     = {PreJuSER-52809},
      pages        = {567 - 584},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {We have made a synopsis of the morphology, ultrastructure,
                      taxonomy, distribution and genetics of two widely
                      distributed but little known species because this is
                      important for the general understanding of species
                      delineation in green algae. The taxa Desmodesmus perforatus
                      and D. tropicus have in common central gaps between
                      coenobial cells, but otherwise according to the type
                      descriptions and type illustrations, they are
                      morphologically well defined and easy to distinguish.
                      However, in screening the literature, the situation becomes
                      confusing and a clear delineation seems to be impossible. To
                      solve the question of whether the two species are in fact
                      different, or extremes of a single morphologically variable
                      taxon, we isolated strains from different localities
                      worldwide as well as strains of the related taxon D.
                      maximus. The strains were studied under both optical and
                      electron microscopes (EM) and the ITS-2r DNA of available
                      strains was compared. With the results of the studied
                      strains, and a comparison with natural populations, we could
                      delimit the taxa D. perforatus var. perforates, D.
                      perforatus var. iberaensis and D. tropicus and revise the
                      literature data. Under the optical microscope, populations
                      are clearly distinguishable, although single specimens may
                      not be. According to ITS-2 rDNA all strains of D. perforatus
                      (except Hegewald 1998-18) and D. tropicus differ by 10 bases
                      and D. perforatus var. perforates and D. perforatus var.
                      iberaensis by 2 bases. Regarding the compensatory base
                      changes (CBC), there are zero exchanges between D.
                      perforates and D. tropicus (except strain Hegewald 1998-18)
                      but D. tropicus and D. perforatus var. iberaensis have one
                      CBC. A stepwise exchange of bases was shown for CBCs. Other
                      accepted taxa are D. perforatus f. bicaudatus (Compere) E.
                      Hegewald, D. tropicus var. longiclathratus (Tell) S.L. Jeon
                      $\&$ E. Hegewald and D. perforatus var. mirabilis (Massjuk)
                      E. Hegewald. A sister group to D. perforatus and D. tropicus
                      is D. maximus. This taxon is similar in EM cell wall
                      structure to D. perforatus and D. tropicus, but has no holes
                      between the cells.},
      keywords     = {J (WoSType)},
      cin          = {ICG-III},
      ddc          = {580},
      cid          = {I:(DE-Juel1)VDB49},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences / Marine $\&$ Freshwater Biology},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000240360600009},
      doi          = {10.2216/05-63.1},
      url          = {https://juser.fz-juelich.de/record/52809},
}