Environmental Engineering Reference
In-Depth Information
Phylum: Chlorophyta Class: Chlorophycea
Order: Tetrasporales Family: Tetrasporaceae
Distribution: Europe, North America, Southwest Asia, Asia, Australia,
New Zealand
Habitat: Still freshwater habitats
Description: This species forms colonies that are spherical, saccate, or cumu-
lus with a size of 1-10 cm diameter and 0.5-1 mm thickness. The cells
(600 µm diameter) are green and slightly ellipsoid with a single pyrenoid.
Compounds and activities: The compounds isolated from the crude extracts of
this species are pentadecatraenoic acid, 3,7,11-trimethyl-2,6,10-dodecatrie-
noic acid, 5,8,11-heptadecanoic acid, β-sitosterol, and transphytol. Among
them, pentadecatetraenoic acid has shown antimicrobial activities against
six pathogenic fungal species and three bacterial species. The percent val-
ues of activities in the irst three compounds were found to be 30.8, 17.6,
and 23.8%, respectively (Ghazala et al.,
2004).
N
OH
N
-
H
3
C
O
CH
3
pentadecatetraenoic acid
HO
O
CH
3
CH
3
O
CH
3
CH
3
CH
3
3,7,11-trimethyl-2-6,10 dodecatrienoic acid
CH
3
OH
O
5,8,11-heptadecanoic acid
