570 Biowissenschaften; Biologie
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In the upper Danube river-system, but also in some more watercourses of the German lower mountains range, an endolithic filamentous cyanobacterium is a prominent compound of the phytobenthos. These filaments penetrate limestones in the river bed and form brush-like endolithic layers of about 0.5 mm in depth. There are similarities between this taxon and approximately 10 other filamentous Cyanophyceae in terms of the width of the trichomes, the geometry of the cells and the shape of the apical cells. However, none of these species allow for a direct and clear-cut identification, and a precise taxonomic determination has therefore been unresolved until today. In order to make progress in this matter, it is necessary to get a better insight into the boring behaviour of this inhabitant and into the endolithic arrangements of the filaments. For
this purpose, special preparation methods and SEM examinations were applied. The results of these procedures as well as critical comparisons with taxonomic properties of similar phormidian taxa, and the special demands on physico-chemical water conditions, led to the conclusion that the taxon in question cannot be assigned to a known species, but must be considered as an independant species. It is here described as Phormidium ingrediens species nova.
Carolinea. – 68 (2010)
(2010)
Carolinea. – 67 (2009)
(2009)
Carolinea. – 66 (2008)
(2008)
Carolinea. – 65 (2007)
(2007)
The morphology of the anamorphic hornbeam powdery mildew fungus Oidium carpini on Carpinus betulus is re-examined using light microscopy. All morphological features were documented by line drawings The conidiophore length is very variable and depends on which side of the leaf the conidiophores are formed. This variability is discussed with respect to the morpho-taxonomic value of conidiophore length and identification of anamorphic Erysiphales species. Furthermore, we report this species for the first time from Iran.
Carolinea. – 64 (2006)
(2006)
Carolinea. - 63 (2005)
(2005)
Carolinea. – 62 (2004)
(2004)
Carolinea. – 61 (2003)
(2003)