Physiological Characteristics and Nitrogen and Iron Utilization of Marine Polycultures and Bundles of Hair Algae

In response to the problem of iron limitation in nitrogen-fixing cyanobacteria, this study explores the potential for symbiotic and mutually beneficial community survival of Polychaeta and Trichoderma. The presence of the two elements and their effects on the survival of the cyanobacteria were first analysed in the context of nitrogen and iron use and cycling in the ocean. The physiological characteristics of the two algae were also analysed in relation to environmental factors such as light, ph and temperature in the marine water column. (730)The results of the incubation experiments showed that the filtrate of Trichoderma reesei had a significant effect on the growth of Polycoccus, with the OD730 rising to 0.0372 within 72 hours of the addition of Trichoderma reesei. The addition of the wild-type iron carrier secretion of G. globulus also promoted the growth rate and nitrogen fixation efficiency of the algae. The symbiotic relationship between the nitrogen and iron utilisation of the algae was shown to contribute to the growth and nitrogen fixation activities of both species.