SEM study of compound oospore wall ornamentation of some members of Charales from Yugoslavia, Croatia and Slovenia

The outermost layer of the oospore wall of the members of Chorales shows various ornamentation patterns, formed due to differential deposition of wall material. These ornamentations are very conservative in nature and used as taxonomic criteria in identifying species and intraspecies taxa in Chorale...

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Bibliographic Details
Published in:Archives of biological sciences Vol. 54; no. 1-2; pp. 28 - 34
Main Authors: Mandal, D.K., Blazencic, Jelena, Ray, S.
Format: Journal Article
Language:English
Published: University of Belgrade, University of Novi Sad 2002
Online Access:Get full text
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Summary:The outermost layer of the oospore wall of the members of Chorales shows various ornamentation patterns, formed due to differential deposition of wall material. These ornamentations are very conservative in nature and used as taxonomic criteria in identifying species and intraspecies taxa in Chorales. In the present investigation, Scanning Electron Microscopy (SEM) was used to study the compound oospore wall ornamentations of twelve species belonging to the genera Chara, Nitella, Lamprothamnium and Lychnothamnus from Yugoslavia, Croatia and Slovenia. The taxonomic identification and systematic position of these taxa are discussed in the light of these characteristic ornamentation patterns revealed by SEM. Spoljasnji sloj zida oospora harofita (Charales) odlikuje se razlicitom, ali za pojedine predstavnike specificnom i postojanom, ornamentikom. Ta morfoloska svojstva znacajna su diferencijalna obelezja pojedinih taksona, a to znaci da imaju vrednost pouzdanog taksonomskog kriterijuma pri identifikaciji vrsta i intraspecijskih taksona metodom skenirajuce elektronske mikroskopije (SEM). U ovom radu SEM je koriscen za proucavanje ornamentike zida oospora, taksonomske identifikacije i razmatranja sistematskog polozaja 12 vrsta roda Chara, Nitell, Lamprothamnium i Lichnothamnus sa podrucja Jugoslavije, Hrvatske i Slovenije. Povrsina zidova oospora C. vulgaris je "resasta" a grade je nisko papilozni oblici sa apikalnim otvorom (Sl. 1. 1). Spoljasnji zid oospora C. contraria je hrapav sa nepravilnim udubljenjima i globularnim ispupcenjima (Sl. 1. 2). Kod C. gymnophylla zid oospora je granularan, dok je kod C. strigosa granularan i sa izduzenjima (Sl. 1.3 i 1.5). C. aculeolata i C. tenuispina pokazuju papilarna uzvisenja ( Sl. 1.4. i 1.6), a C. braunii ima hrapave zidove sa jamicama, porama i udubljenjima (Sl. 1.7). Kod Lamprothamnium papulosum zid oospora je fino granuliran (Sl. 1.8), a kod Lychnothamnus barbatus je hrapav (Sl. 1.9). N. brachyteles ima mrezast zid oospora (Sl. 1.10), zid oospora N. capillaris je gusto kvrzicast (Sl. 1.11), a kod N. flexilis je hrapava i plitko izbrazdana (Sl. 1.12).
ISSN:0354-4664
1821-4339
DOI:10.2298/ABS0202028M