G. Mahesh et S. Kannaiyan, EFFECT OF IMMOBILIZATION OF CYANOBACTERIA IN SOLID-MATRIX ON AMMONIA EXCRETION AND NITROGEN-FIXING ACTIVITY, Biotechnology letters, 15(9), 1993, pp. 975-978
The algal symbiont of Azolla - Anabaena azollae (AS-DS) and free-livin
g A.variabilis (SAo) colonized and immobilized well in all the solid m
atrices such as hollow fibre, polyurethane foam, cotton and silk cotto
n. Biomass production was more under immobilized state than under free
-living state. Heterocyst frequency, nitrogen fixing activity and ammo
nia excretion were significantly higher under immobilized state than u
nder free-living conditions.