Topic
Desmidiaceae
About: Desmidiaceae is a research topic. Over the lifetime, 160 publications have been published within this topic receiving 2050 citations.
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Papers
Book•
1 Jan 1904
Abstract: PROGRESS in the study of a difficult group such as the Desmidiacese depends to a very large extent on the publication from time to time of treatises giving an adequate representation of the momentary state of our knowledge. In the past, we have been indebted to de Brebisson, Lundell, Ralfs, and others for works that gave a great impetus to the study of this group. During the latter half of the nineteenth century, Ralfs “British Desmids “indeed formed the standard work of reference, but as the years advanced it became more and more out-of-date, and a new monograph was long overdue when the publication of Messrs. West's “British Desmidiaceae” commenced in 1904. There can be no doubt that this work, which in thoroughness and general excellence far exceeded anything hitherto produced in this direction, marked a great step forward, epitomising as it did the extensive researches that had been carried out in the last quarter of the last century, and placing at the disposal of the scientific world the prolonged and unrivalled experience of two of the foremost algologists of the time. Its influence was almost immediately manifest and has become increasingly so with the publication of successive volumes. A Monograph of the British Desmidiaceae. By the late W. West Prof. G. S. West. Vol. 5, by Dr. Nellie Carter. Pp. xxi + 300 + 39 plates. (London: Printed for the Ray Society, 1923.) 37s. 6d.
205 citations
202 citations
TL;DR: In this article, the authors described a number of species of Zygnemataceae from lower and upper Pleistocene, Upper and Holocene sediments from the Colombian Andes, including Mougeotia, Spirogyra and Debarya.
140 citations
112 citations
TL;DR: The molecular data do not support hypotheses of monophyly for groups of extant unicellular and filamentous or colonial desmid genera exhibiting a common cell shape, but imply that multicellular placoderm desmids are monophyletic.
Abstract: Sequences of the gene encoding the large subunit of RUBISCO (rbcL) for 30 genera in the six currently recognized families of conjugating green algae (Desmidiaceae, Gonatozygaceae, Mesotaeniaceae, Peniaceae, and Zygnemataceae) were analyzed using maximum parsimony and maximum likelihood; bootstrap replications were performed as a measure of support for clades. Other Charophyceae sensu Mattox and Stewart and representative land plants were used as outgroups. All analyses supported the monophyly of the conjugating green algae. The Desmidiales, or placoderm desmids, constitute a monophyletic group, with moderate to strong support for the four component families of this assemblage (Closteriaceae, Desmidiaceae, Gonatozygaceae, and Peniaceae). The analyses showed that the two families of Zygnematales (Mesotaeniaceae, Zygnemataceae), which have plesiomorphic, unornamented and unsegmented cell walls, are not monophyletic. However, combined taxa of these two traditional families may constitute a monophyletic group. Partitioning the data by codon position revealed no significant differences across all positions or between partitions of positions one and two versus position three. The trees resulting from parsimony analyses using first plus second positions versus third position differed only in topology of branches with poor bootstrap support. The tree derived from third positions only was more resolved than the tree derived from first and second positions. The rbcL-based phylogeny is largely congruent with published analyses of small subunit rDNA sequences for the Zygnematales. The molecular data do not support hypotheses of monophyly for groups of extant unicellular and filamentous or colonial desmid genera exhibiting a common cell shape. A trend is evident from simple omniradiate cell shapes to taxa with lobed cell and plastid shapes, which supports the hypothesis that chloroplast shape evolved generally from simple to complex. The data imply that multicellular placoderm desmids are monophyletic. Several anomalous placements of genera were found, including the saccoderm desmid Roya in the Gonatozygaceae and the zygnematacean Entransia in the Coleochaetales. The former is strongly supported, although the latter is not, and Entransia's phylogenetic position warrants further study.
111 citations
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| Year | Papers |
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| 2021 | 2 |
| 2020 | 4 |
| 2019 | 5 |
| 2018 | 5 |
| 2017 | 4 |
| 2016 | 4 |