Environmental Engineering Reference
In-Depth Information
ANABAENA LAXA
(RABENHORST) A. BAUN
Phylum: Cyanobacteria Class: Cyanophyceae
Order: Nostocales Family: Nostocaceae
Distribution: Europe, Australia, New Zealand
Habitat: Rice ields, terrestrial habitats
Description: The cells of this species form unbranched ilaments that are ran-
domly twisted or coiled. The vegetative cells (12 × 14 mm) are spherical
to oblong and are with granules. The akinetes (50-15 mm) are larger than
vegetative cells. The heterocysts (10 × 9 mm) are spherical and empty.
Compounds and activities: The compounds isolated from this species are laxo-
phycins A-E, which possess antifungal properties (Chaudhary et al.,
2012).
7 A17
O
O
N
+
O
-
O
-
O
O
N
+
O
O
laxaphycin
ANABAENA CYLINDRICA
LEMMERMANN, 1896
Phylum: Cyanobacteria Class: Cyanophyceae
Order: Nostocales Family: Nostocaceae
Distribution: Europe, Asia, Australia, New Zealand
Habitat: Freshwater ponds, lakes
Description: Cells (4 µm wide) are cylindrical and the trichome is without
branching. Heterocysts are provided with a thin mucus sheath.
Compounds and activities: The extracts of this species have been found to possess
antimicrobial activities. The values of inhibition zone diameter (mm) for the
