Author(s): M. Aruna, M. Srinivas
Blue green algae are found in all types of aquatic bodies. Paddy fields represent one such habitat. An attempt has been made to isolate cyanobacteria from paddy fields of Siddipet region in Telangana State. Blue Green Algae are the most important nitrogen fixing organisms because of their autotrophic nutrition and flourish in paddy fields and known to sustain the fertility of this ecosystem. This paddy ecosystem allows BGA to function properly, selectively and effectively.To initiate the study, soil samples were collected in clean polythene bags. At the time of collection, the surface of the sampling station was cleaned by removing small stones, pebbles and grasses. The collected samples were brought to the laboratory, cultures were maintained and periodical observations were made on alga appearing in the cultures. As many as 34 species of cyanobacteria were identified.Both heterocystous and non- heterocystous forms were observed. The Nostocaceae has been reported by maximum number of genera and species. The genera Scytonema, Oscillatoria, Nostoc and Lyngbya were represented by maximum number of species.
Paddy fields, Heterocystous and non-heterocystous forms
- Anand. N. (1989). Handbook of blue green algae. Bisen Singh and Mahendrapal Singh Publishers, Dehradun
- Board N . (2004): The complete technology book on Biofertilizer and organic farming New Delhi.
- Choudhury A.T.M.A.,Kennedy I.R (2005) : Nitrogen fertilizer losses from rice soils & Control of environmental pollution problem. Communications in soil science & plant analysis .36;1625-1639.
- Desikachary T.V. (1959 ). Cynaophyta .Indian Council of Agricultral Research, New Delhi,,700.
- Fritch F.E. (1907b) : The sub aerial & fresh water algal flora of tropics. Annual of Botany 30 ;235-275.
- Fritsch F.E .(1907a) : A general consideration of aerial & fresh water algal flora of ceylon. Proceedings of the Royal society of London,Series B11:79-197.
- Kondo M., Yasuda M .(2003): Seasonal changes in N2 fixation activity and environment in paddy soils of Japan. Japan Agricultural Research Quarterly,37: 105-111.
- Nayak S.R, Prassana S,Pabbi TK, Dominic and Singh P.K. (2004). Effect of BGA-Azolla biofertilizer on nitrogen fixation and chlorophyll accumulation at different depths of soil cores. Biology and fertility of soils,40, 67-72.
- Prasanna R and Nayak S. (2007). Influence of diverse soil ecologies on cyanobacterial diversity and abundance. Wetlands ecological Management, 15, 127-134.
- Presscott, G.W. (1969). How to know the fresh water algae. Dubuque,Iowa A.W.Moore,Azolla biology and organic signifacnce.Bot,Rev..35:17-35.
- Royer P.A.,Reynand P.A.(1982): Free living Blue Green Algae in tropical soils. Martinus Nijhoft Publisher,L.A.Hague.
- Song T., Martensson L.,Eriksson.T.,Zleng.W.,Rasmussen U.(2005): Biodiversity & Seasonal variation of the cyanobacterial assemblage in rice paddy field in Fujjan,China. The federation of European materials societies Microbiology Ecology.,En:131-140.
- Uheda (1980) .Phycology; Principals, processes and Applications. page 2015. Edited by Amrik Singh Ahluwalia
- Venkataraman. G (1957) . The algal flora of the ponds and puddles inside the Banaras Hindu University campus, India.J.Bomb.Nat.Hist.Soc.,54:908-91
Cite this Article:
International Journal of Sciences is Open Access Journal.
This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License.
Author(s) retain the copyrights of this article, though, publication rights are with Alkhaer Publications.