Nostoc muscorum

Phycochrome a, extracted from Tolypothrix distorta, Phormidium luridum, Nostoc muscorum and Anacystis nidulans, has one form absorbing maximally at about 590 nm, formed in red light, and another one absorbing at 570 nm, formed in yellow-green and blue-green light. 

Fig. 8. Difference spectrum (green irradiated minus red irradiated) of phycochrome c (solid line), action spectrum for induction of filamentous growth of Nostoc muscorum (dotted line), and action spectrum for inhibition of C-phycoerythrin synthesis in Tolypothrix tenuis (dashed-dotted line). Abscissa wavelength in nm Ordinates relative absorbance change und relative action (after Bjorn and Bjorn 5))...

Suppressed pigment biosynthesis in Aulosira fertissima and Tolypothrix tenuis, reduced growth in Anabaena oryzae and Nostoc muscorum, and reduced carbohydrate content in Nostoc and Tolypothrix (Shabana 1987)... 

Shabana, E.F. 1987. Use of batch assays to assess the toxicity of atrazine to some selected cyanobacteria. 1. Influence of atrazine on the growth, pigmentation and carbohydrate contents of Aulosira fertilissima, Anabaena oryzae, Nostoc muscorum and Tolypothrix tenuis. Jour. Basic Microbiol. 2 113-119. 

Kar, S. and P.K. Singh. 1978. Effect of pH, light intensity and population on the toxicity of the pesticide carbofuran to the blue-green alga Nostoc muscorum. Microbios 21 177-184. 

Vaishampayan, A. 1983. Mo-V interactions during N2- and N03-metabohsm in a N2-fixing blue-green alga Nostoc muscorum. Experientia 39 358-360. 

Anacystis nidulans, Nostoc muscorum, Schauberger Wildman 1977)... 

Kami, L., Moss, S.J., and Tel-Or, E. (1984) Glutathione reductase activity in heterocysts and vegetative cells of cyanobacterium Nostoc muscorum, Arch. Microbiol. 140, 215-217. 

Bisseret P., Zundel M., and Rohmer M. (1985) 2jS-Methylho-panoids from Methylobacterium organophilum and Nostoc muscorum, a new series of prokaryotic triterpenoids. Euro. J. Biochem. 150, 29—34. 

Strains studied were as follows Anabaena sp. PCC7120, Anabaena cylindrica IAM M-l, Anabaena variabilis IAM M-58, Anabaenopsis circularis IAM M-4, Nostoc muscorum IAM M-14, Nostoc linckia IAM M-30, Nostoc commune IAM M-13, Nostoc carneum IAM M-35, Cylindrospermum muscicola IAM M-32, Anabaena cylindrica UTEX B 629, Anabaena flos-aquae UTEX 1444, and Anabaena flos-aquae UTEX LB 2558. Anabaena sp. PCC7120 was kindly donated by Dr. Ohmori of the University of Tokyo. UTEX and IAM strains were obtained from the Culture Collection of Algae at the University of Texas and the Institute of Applied Microbiology, University of Tokyo, respectively. 

Compounds isolated from the genus Nostoc (order Nostocales, 73 compounds) have predominantly been isolated from unknown species (91%). Nostoc commune accounts for only 6% of the isolated compounds with Nostoc linckia, Nostoc muscorum, and Nostoc spongiaeforme, each responsible for about 1 %. 

Nitrate reductase activity has been demonstrated in particulate fractions of Nostoc muscorum (Ortegaal., 1976), Anacystis nidulans (Manzanoet al., 1976) a.nd Anabaena cylindrica (Hattori, 1970). The enzyme is particulate and although it has been released by detergent treatment of acetone precipitates (Hattori, 1970), there has been no description of molecular characteristics. The association of the assimilatory nitrate reductase with membranes in the cyanobacterium appears to be a distinct divergence from the classification for bacterial nitrate reductases proposed by Pichinoty. 

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