Seasonal variation of Soil Nitrogen and Cyanoprokaryote Diversity (Heterocystous and Non-Heterocystous) across two Blocks of North 24 Parganas District, West Bengal, India
Jayanta Sikdar
Department of Botany, Surendranath College, 24/2 M.G. Road, Kolkata-700009 (India) Corresponding author: jayantabot@gmail.com
ABSTRACT
In heterocystous cyanoprokaryotes the most notable character is nitrogen fixation. Here a comparative study of soil nitrogen concentration and the presence of heterocystous and non-heterocystous cyanoprokaryotes in a seasonal basis of two block division (BarrackpurI and Barrackpur-II block of North 24 Parganas district) were made. In soil analysis, seasonal variation shows that heterocystous cyanoprokaryotes favour nitrogen-deficit soils. It shows that nitrogen deficit soil (Barrackpur-I block) induces the stress signal for allow favouring for the production of heterocyst and subsequently increasing or modified by non-heterocystous cyanoprokaryotes when nitrogen content of soil increases (Barrackpur-II block).