Identification of Two Morphologically Similar Charophytes using Morphometric Characteristics:Chara vulgaris and Chara gymnophylla
Akram Ahmadi, Hossein Riahi, Masoud Sheidai


The study of morphometric measurements of two morphologically similar charophytes, Chara vulgaris L. and Chara gymnophylla A. Braun from fresh water habitats can distinguish them from each other. Although both species differ in some characters but morphological differences are problematic when they co-occur in the same lakes, rivers or springs. Morphological differences given in identification keys couldn’t distinguish species and subspecies in the field. Therefore, additional characteristics were measured and suggested as useful features in differences of both species and their subspecies. Individuals of both species were collected in the vegetation seasons 2009 and 2013. Morphometric measurements and Statistical tests were done on 19 different quantitative and qualitative characters, number of branchlet corticated segments revealed the most significant difference.

 Branchlet/internode length ratio, characteristics of end segment: number of cells, number of corticated segments, end segment length were differed in Chara vulgaris and C. gymnophylla varieties. We applied these features as a useful morphometry characters for differentiation, particularly under conditions where both species co-occur.

Chara vulgaris. Charophytes. Chara gymnophylla. Identification. PCA. Morphometric Analysis.


Bittencourt-Oliveira MC. (2000). Development of Microcystis aeruginosa (Kütz.) Kütz. (Cyanophyceae/ Cyanobacteria) under cultivation and its taxonomic implications. Archives for Hydrobiology/Algology Studies. 99: 29-37.

Chorus I, Bartram J. (1999). Toxic cyanobacteria in water: a guideto their public health consequences, monitoring and management. E&F Spon, London.

Crow W B. (1923). The taxonomy and variation of the genus Microcystis in Ceylon. New Phycologist. 22:59- 68.

Desikachary IV (1959) Cyanophyta. I. C. A. R., New Delhi. 685 pp.

Doolittle W F. (1982). Molecular evolution. In: The Biology of Cyanobacteria, Volume 19. N. G. Carr and B. A. Whitton, eds. Berkeley, University of California Press. p. 307-332.

Filipuzzi S, Faramarzi M (2007) The Science and Politics of Large Dam Project Aras river basin: damfacility and water management policy.An analysis on performance. Swiss Federal Institute of Aquatic Scienceand Technology.

Geitler L. (1932). Cyanophyceae. In Kryptogramen flora von Deutschland, Österreich und der Schweiz. Vol. 14, edited by Rabenhorst, L., AkademischeVerlags gesell schaft, Leipzig. pp. 130–148.

Gibbons NE and Murray RGE. (1978). Proposals concerning the higher taxa of bacteria. International Journal of Systematic Bacterioliology. 28:1-6.

Hammer Ø, Harper DAT Ryan PD. (2001). PAST: Paleontological Statistics software package.

Holt J G, Krieg NR, Sneath PHA, Staley JT, Williams ST. (1994). Group 11.Oxygenic phototrophic bacteria. In Bergey’s Manual of Determinative Bacteriology, 9th ed., ed. by Hensyl, W. R., Williams & Wilkins, Baltimore. 377–425.

Komárek J and Komárková J (2002) Review of the European Microcystis morphospecies (Cyanoprokaryotes) from nature. Czech Phycology, Olomouc. 2: 1- 24.

Otsuka S, Suda S, Li R, Matsumoto S, Watanabe MM. (2000). Morphological variability of colonies of Microcystis morphospecies in culture. Journal of General and Applied Microbiology. 46:39-50.

Reynolds CS, Jaworski GHM, Cmiech HA, Leedale GF. (1981). On the annual Cycle of the blue-green alga Microcystis aeruginosa Kütz. Emend. Elenkin. Philosophical Transaction Royal Society of London B. 293: 419-477.

Schopf JW. (2000). The fossil record: tracing the roots of the cyanobacterial lineage. In: Whitton BA, Potts M (Eds). The ecology of cyanobacteria. Kluwer Academic, Dordrecht. 13–35.

SomdeeTh, Kaewkhiaw K, Somdee A. (2013). Detection of toxic cyanobacteria and quantification of microcystins in four recreational water reservoirs in Khon Kaen, Thailand. KKU Research Journal. 18:1-8.

Stanier RY, Kunisawa R, Mandel M, Cohen-Bazire G. (1971). Purification and properties of unicellular blue-green algae (order Chroococcales). Bacteriological Reviews. 35: 171–205.

Stanier RY, Sistrom WR, Hansen TA, Whitton BA, Castenholz RW, Pfenning N, Gorlenko VN, Kondratieva EN, Eimhjellen KE, Whitten Bury R, Gherna RL, Truper HG. (1978). Proposal to place the nomenclature of the cyanobacteria (blue-green algae) under the rules of the International Code of Nomenclature of Bacteria. International Journal of Systematic Bacteriology. 28: 335-336.

Tahami FS. (2001). Toxic characteristics of Microcystis. South physician.Special issue of national physician and sea congress. (4): 60.

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