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International Journal on Algae
SJR: 0.216 SNIP: 0.322 CiteScore™: 0.4

ISSN Печать: 1521-9429
ISSN Онлайн: 1940-4328

Выпуски:
Том 22, 2020 Том 21, 2019 Том 20, 2018 Том 19, 2017 Том 18, 2016 Том 17, 2015 Том 16, 2014 Том 15, 2013 Том 14, 2012 Том 13, 2011 Том 12, 2010 Том 11, 2009 Том 10, 2008 Том 9, 2007 Том 8, 2006 Том 7, 2005 Том 6, 2004 Том 5, 2003 Том 4, 2002 Том 3, 2001 Том 2, 2000 Том 1, 1999

International Journal on Algae

DOI: 10.1615/InterJAlgae.v11.i1.80
pages 84-98

Phycochemistry and bioactivity of ten freshwater algae from Pakistan

B. Ghazala
Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan-60700; Department of Botany, G.C. Univ., Lahore- 54000, Pakistan
B. Naila
Department of Botany, University of Karachi, Karachi-75270, Pakistan
M. Shameel
Department of Botany, University of Karachi, Karachi-75270, Pakistan

Краткое описание

Seven blue-green and three green algae were collected from various freshwater habitats of Sindh (Pakistan) during January 1997 - December 1999 and investigated. Their methanol extracts revealed 17 saturated, 2 monoynoic, 12 monoenoic, 5 di-unsaturated, 5 tri-unsaturated and 6 polyunsaturated fatty acids (FAs), β-sitosterol and trans-phytol, which were identified by GC-MS and NMR spectroscopy. Palmitoleic acid was the most commonly occurring FA, while C15:0, C16:0, C14:1, and C18:1 were the next commonly occurring acids. The unsaturated acids were found in larger proportion (46.50-70.46%) than saturated FAs (16.82-39.20%). The blue-green algae did not differ much from green algae of Pakistan in their FA-compositions. Their methanol extracts exhibited poor antibacterial activity but strong antifungal activities. They showed a significant phytotoxic activity but non-significant cytotoxic and insecticidal activities. The extract of Lyngbya hieronymusii enhanced antitumour activity from 20 to 45% with an increase in the concentration of extract. Algae belonging to three phyla (Cyanophyta, Chlorophyta, and Charophyta) revealed differences in their FA-, sterol- and terpene-compositions as well as their bioactivities.


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