Chara braunii, C.C.Gmel

Milovanović, Vanja, Popović, Slađana, Predojević, Dragana, Simić, Gordana Subakov, Ržaničanin, Ana, Sekulić, Jasmina Šinžar & Trbojević, Ivana, 2022, Oospore features among morphologically similar and closely related charophyte species: consistency and variability, Cryptogamie, Algologie 20 (12), pp. 189-200 : 194

CHARA BRAUNII

Oospores of the Chara braunii analyzed in this study were ellipsoidal in shape and elongated (prolate). Their color was mostly dark brown, to black – from RAL 8016 (mahogany brown) to RAL 8022 (black-brown), rarely RAL 9011 (graphite black) ( Fig. 3D ). The membrane was light brown and granular. A total number of 48 oospores was measured and included in the analysis, 28 from the vicinity of Bela Crkva (pond LO1) and 20 from the SNR Gornje Podunavlje (GPL3).

Oospore parameters of Chara braunii in relation to localities where this taxon was recorded are shown in Figure 6 . Analysis described 22% variability in our data, and was significant (F = 1.3, P = 0.002). Variability between populations in remote localities was detectable, and all oospore parameters (except ANI and ISI) correlated with the locality in the vicinity of Bela Crkva (LO1), meaning that the oospores from this locality were distinctively longer and wider, with wider fossa. ISI showed positive correlation only with the locality in SNR Gornje Podunavlje (GPL3), while ANI did not show correlation to any of the sites.

Figures

FIG. 3. — Oospores of selected charophyte species:A, Chara globularis Thuil.; B, Chara “connivens” P.Salzmann ex A.Braun;C, Chara baueri A.Braun;D, Chara braunii C.C.Gmel. Scale bars: 200 µm.

FIG. 6. — Oospore parameters of Chara braunii C.C.Gmel. in relation to localities where this species was found. Redundancy analysis (RDA). Abbreviations: see Material and methods.