Auxospore wall structure and postsexual valve morphology
in Rhabdonema minutum Kützing
1
Biology Department, Mount Allison University, 63B York Street,
Sackville, New Brunswick, E4L 1G7, Canada
2
Digital Microscopy Facility, Mount Allison University, 63B York
Street, Sackville, New Brunswick, E4L 1G7, Canada
Publication date: 2019-07-18
Plant and Fungal Systematics 2019; 64(1): 33-39
KEYWORDS
auxosporulationaraphid pennate diatomincunabular scaleslongitudinal perizonial bandsperizoniumevolution of raphe
ABSTRACT
Several decades ago, three members of the araphid pennate genus Rhabdonema
(R. adriaticum, R. arcuatum, R. minutum) were the first araphid diatoms studied using
cultures and electron microscopical methods to determine auxospore structure and development.
Of these, R. minutum was the least documented at that time. None have been
reinvestigated until now. Here we present the structural elements of the mature auxospore
and the initial and postsexual valve characteristics of R. minutum. Although in general the
auxospore wall of this diatom is similar to that of the two other species examined (to the
extent that they were documented), there are intriguing differences. Most unanticipated is
the structure of the primary band of the longitudinal perizonium, which shows remarkable
similarities to the raphid pennate diatom valve. The evolutionary implications of such
a similarity are considered.
REFERENCES (30)
1.
Álvarez-Blanco, I. & Blanco, S. 2014. Benthic diatoms from Mediterranean coasts. Bibliotheca Diatomologica 60: 1–409.
2.
Andersen, R. A. 2005. Algal Culturing Techniques. Elsevier Academic Press, San Diego.
3.
Cleve-Euler, A. 1953. Die Diatomeen von Schweden und Finnland. Part III. Monoraphideae, Biraphideae 1. Kongliga Svenska Vetenskaps-Akademiens Handligar 4: 1–255.
4.
Hasle, G. R. 1974. The ‘mucilage pore’ of pennate diatoms. Nova Hedwigia, Beiheft 45: 167–194.
5.
Hendey, N. I. 1964. An Introductory Account of the Smaller Algae of British Coastal Waters. Her Majesty’s Stationery Office, London.
6.
Hustedt, F. 1959 [1985]. Die Kieselalgen Deutschlands, Ӧsterreichs und der Schweiz unter Berücksichtigung der übrigen Länder Europas sowie der angrenzenden Meeresgebiete. 2. Teil. Kryptogamen Flora von Deutschland, Ӧsterreich und der Schweiz. Akademische Verlagsgesellschaft m.b.h., Johnson Reprint Corporation, New York.
7.
Idei, M., Sato, S., Tamotsu, N. & Mann, D. G. 2018. Valve morphogenesis in Diploneis smithii (Bacillariophyta). Journal of Phycology 54: 171–186.
8.
Kaczmarska, I., Bates, S. S., Ehrman, J. M. & Léger, C. 2000. Fine structure of the gamete, auxospore and initial cell in the pennate diatom Pseudo-nitzschia multiseries (H.) Hasle. Nova Hedwigia 71: 337–351.
9.
Kaczmarska, I., Davidovich, N. A. & Ehrman, J. M. 2007. Sex cells and reproduction in the diatom Nitzschia longissima (Bacillariophyta): discovery of siliceous scales in gamete cell walls and novel elements of the perizonium. Phycologia 46: 726–737.
10.
Kaczmarska, I., Ehrman, J. M., Davidovich, N. A., Davidovich, O. & Podunay, Y. A. 2018. Structure and development of the auxospore in Ardissonea crystallina (C. Agardh) Grunow demonstrates another way for a centric to look like a pennate. Protist 169: 466–483.
11.
Kaczmarska, I., Gray, B. S. Jr., Ehrman, J. M. & Thaler, M. 2017. Sexual reproduction in plagiogrammacean diatoms: first insights into the early pennates. PLoS ONE 12: e0181413.
12.
Kaczmarska, I., Martin, J. L., LeGresley, M. M & Ehrman, J. M. 2005. Diversity of the diatom genus Pseudo-nitzschia Peragallo in the Quoddy Region of the Bay of Fundy, Canada. Harmful Algae 4: 1–19.
13.
Kaczmarska, I., Poulíčková, A., Sato, S., Edlund, M. B., Idei, M., Watanabe, T. & Mann, D. G. 2013. Proposals for a terminology for diatom sexual reproduction, auxospores and resting stages. Diatom Research 28: 263–294.
14.
Karsten, G. 1899. Die Diatomeen der Kieler Bucht. Wissenschaftliche Meeresuntersuchungen. Neue Folge V.B. 4., pp. 17–207. Verlag von Lipsius & Tischer, Kiel & Leipzig.
16.
Mann, D. G. 1982. Structure, life history and systematics of Rhoicosphenia (Bacillariophyta). II. Auxospore formation and perizonium structure of Rh. curvata. Journal of Phycology 18: 264–274.
17.
Mann, D. G. 1984. An ontogenetic approach to diatom systematics. In: Mann, D. G. (ed.), Proceedings of the 7th International Diatom Symposium, pp. 113–144. O. Koeltz, Koenigstein.
18.
Mann, D. G., & Poulíčková, A. 2009. Incunabula and perizonium of Neidium (Bacillariophyta). Fottea 9: 211–222.
19.
Moniz, M. B. J. & Kaczmarska, I. 2010. Barcoding of diatoms: nuclear encoded ITS revisited. Protist 161: 7–34.
20.
Poulin, M., Bérard-Therriault, L. & Cardinal, A. 1984. Les diatomées benthiques de substrats durs des eaux marines et saumâtres du Québec. 2. Tabellarioideae et Diatomoideae (Fragilariales, Fragilariaceae). Le Naturaliste Canadien 111: 275–295.
21.
Ross, R., Cox, E. J., Karayeva, N. I., Mann, D. G., Paddock, T. B. B., Simonsen, R. & Sims, P.A. 1979. An amended terminology for the siliceous components of the diatom cell. Nova Hedwigia, Beihefte 64: 513–533.
22.
Round, F. E., Crawford, R. M. & Mann, D. G. 1990. The Diatoms. Biology and Morphology of the Genera. Cambridge University Press, Cambridge.
23.
Sato, S., Nagumo, T. & Tanaka, J. 2004. Auxospore formation and the morphology of the initial cell of the marine araphid diatom Gephyria media (Bacillariophyceae). Journal of Phycology 40: 684–691.
24.
Sato, S., Mann, D. G., Nagumo, T., Tanaka, J., Tadano, T. & Medlin, L. K. 2008a. Auxospore fine structure and variation in modes of cell size changes in Grammatophora marina (Bacillariophyta). Phycologia 47: 12–27.
25.
Sato, S., Kuriyama, K., Tadano, T. & Medlin, L. K. 2008b. Auxospore fine structure in a marine araphid diatom Tabularia parva. Diatom Research 23: 423–433.
26.
Sato, S., Mann, D. G., Matsumoto, S. & Medlin, L. K. 2008c. Pseudostriatella (Bacillariophyta); a description of a new araphid diatom genus based on observations of frustule and auxospore structure and 18S rDNA phylogeny. Phycologia 47: 371–391.
27.
Snoeijs, P. & Vilbaste, S. (eds.). 1994. Intercalibration and Distribution of Diatom Species in the Baltic Sea, Volume 2. Opulus Press, Uppsala.
28.
von Stosch, H. A. 1958. Kann die oogame Araphidee Rhabdonema adriaticum als Bindeglied zwischen den beiden grossen Diatomeengruppen angesehen werden? Berichte der Deutschen Botanischen Gesellschaft 71: 241–249.
29.
von Stosch, H. A. 1962. Über das Perizonium der Diatomeen. Vorträge aus dem Gesamtgebiet der Botanik 1: 43–52.
30.
von Stosch, H. A. 1982. On auxospore envelopes in diatoms. Bacillaria 5: 127–156.
CITATIONS (1):
1.
Enlarge or die! An auxospore perspective on diatom diversification
Irena Kaczmarska, James Ehrman
Organisms Diversity & Evolution
Irena Kaczmarska, James Ehrman
Organisms Diversity & Evolution
| eISSN: | 2657-5000 |
| ISSN: | 2544-7459 |
We process personal data collected when visiting the website. The function of obtaining information about users and their behavior is carried out by voluntarily entered information in forms and saving cookies in end devices. Data, including cookies, are used to provide services, improve the user experience and to analyze the traffic in accordance with the Privacy policy. Data are also collected and processed by Google Analytics tool (more).
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.
