INDIAN SCIENCE CONGRESS - India Environment Portal

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Proc. 98th Indian Science Congress, Part II : Abstracts of Oral/Poster Presentation
tion for documentation and screening of cyanobacteria for ecosystem sustainability.
Cyanobacterial diversity of Jaunapur city has been least explored. We Studied the
effect of pollution and seasonal change on cyanobacterial species diversity in
Jaunpur city located at 25°44’to 25°45'(lat.) and 87°42’to 87°43'(long.) in tropical
semiarid type of climatic zone. In the present study cyanobacteria (heterocystous
& nonheterocystous) and water samples randomly collected from five different
sites located at the Gomti river of fresh area of lotic water, the major sewage of
the city is drained through the nalas in the Gomti river, water logging condition near
road side,lentic pond water near T. D. College, in the pipelines of water supply. The
physico-chemical properties of effluents from different sites have been investigated.
The sample water of different sites have range of pH (7. 50-8. 40), temperature
(29. 00-30. 75), Alkalinity (115. 50-267. 50) mg-1,Acidity (4. 43-16. 75) mg-I,N03(.
67-1. 70) mg-1,P04(. 27-1. 37) mg-I. On the basis of this physico-chemical studies,
most polluted sites have been marked. This study reveals that the density ofBGA
is more in polluted waters. The number of cyanobacteria increases in summer
months (peakin apriI). In total (56) (heterocystous and non-heterocystous) blue
green-algal forms were recorded belonging to genera viz. Nostoc, Anabaena,
Plectonema, Phormidium,Micro cys tis, Chroococcus, Gloeocapsa, Gloeotheca,
Oscilliatoria, Lyngbya, MerismI.’
5. Transmission Electron Microscopic Studies on Gelidium elegans
K. Sivakumar
Department of Botany,
Annamalai University,
Annamalainagar-608 002, Tamil Nadu,
Keywords : TEM, Gelidium, SEM
Studies were made on the mature vegetative thalli of Gelidium elegans
(Kutzin. g)using Scanning and Transmission Electron Microscopy. SEM studies
reveals that presence of thick amorphous mucilagineous epidermal layer followed
by cortical cells and cortical cells are interposed between the group of rhizoidal
filaments. Rhizoidal cells are more or less hemispherical in shape and distinct hallow
in the centre region. TEM studies showed that the epidermal cell wall consisted of
an outer layer with fine, parallel fibrils, an amorphous mid layer with discarded