Cyanobacteria 8 Tolypothrix tenuis Calothrix sp. PCC 7101 4 Exopolysaccharide 4 Tolypothrix 4 Bioactive extracellular substances 2 Cyanobacterium 2 Enzyme 2 Maize 2 Microchaete tenera 2 Nostoc 2 Nostoc muscorum 2 Plant growth regulators 2 Plant regeneration 2 Porphyrin 2 Rice callus 2 Sheaths 2 Soil stability 2 article 2 carbon 2 controlled study 2 crop 2 fertilizer 2 inoculation 2 nitrogen 2 nitrogen fixation 2 nonhuman 2 nutrient 2 oxidation 2 pH 2