IJSR - International Journal of Scientific Research

Mahalingam.P.U; Muniappan.K; Therasammal.M

Volume : V, Issue : VIII, August - 2016

STUDIES ON MORPHOMETRIC EVALUATION OF SYMBIOTIC CYANOBIONT IN TWO SPECIES OF AZOLLA FERN

Mahalingam. P. U, Muniappan. K, Therasammal. M

Abstract :

Azolla is very known biofertilizer for rice cultivation it can enrich soil N2 content and for the soil fertility. In view of this, an invitro study was carried out on morphometric studies on Anabaena azollae present in two species of Azolla fern (A.microphylla, and A. fulicolides). The selected Azolla species were grown in standard medium prepared with garden soil, cow dung, super phosphate and its combinations in separate containers. The matured Azolla cultures were observed for its growth profile viz. number of leaflets per plant and fresh & dry weight of whole plant on 15d and 21d. Followed by, the morphometric study on symbiotic cyanobacteria present in the leaf cavities of two species of Azolla was determined through observing average number of cyanobaterial filament in the leaf cavity of azolla, length of each cyanobacterial filament, number of vegetative cells and number & position of heterocyst in each cyanobacterial filament.