Influence of Mo and Fe on Photosynthetic and Nitrogenase Activities of Nitrogen-Fixing Cyanobacteria under Nitrogen Starvation

Abstract

The potential of cyanobacteria to perform a variety of distinct roles vital for the biosphere, including nutrient cycling and environmental detoxification, drives interest in studying their biodiversity. Increasing soil erosion and the overuse of chemical fertilizers are global problems in developed countries. The option might be to switch to organic farming, which entails largely the use of biofertilisers. Cyanobacteria are prokaryotic, photosynthetic organisms with considerable potential, within agrobiotechnology, to produce biofertilisers. They contribute significantly to plant drought resistance and nitrogen enrichment in the soil. This study sought, isolated, and investigated nitrogen-fixing cyanobacterial strains in rice fields, and evaluated the effect of Mo and Fe on photosynthetic and nitrogenase activities under nitrogen starvation. Cyanobacterial isolates, isolated from rice paddies in Kazakhstan, were identified as Trichormus variabilis K-31 (MZ079356), Cylindrospermum badium J-8 (MZ079357), Nostoc sp. J-14 (MZ079360), Oscillatoria brevis SH-12 (MZ090011), and Tolypothrix tenuis J-1 (MZ079361). The study of the influence of various concentrations of Mo and Fe on photosynthetic and nitrogenase activities under conditions of nitrogen starvation revealed the optimal concentrations of metals that have a stimulating effect on the studied parameters.

Effect of Blue-Green Algae in Soils with Different Texture: (a) on Enhancement Growth and Yield of Wheat Plant

“…Table (4) shows that the clay loam soil significantly increased the 1000-grain weight more than the sandy soil. The results were similar to those of Ghazal et al (2018), Abou Tahoun et al (2020), and Sadvakasova et al (2022. Grains weight (g pot -1 ) Data related to grains weight as affected by various nitrogen fertilizer levels, cyanobacteria strains and different soil types are presented in Table (5).…”

“…). AuthorsGhazal et al (2018), Abou Tahoun et al (2020), and Sadvakasova et al (2022 also published a similar result.…”

Impact of plastic mulches and algae fertilizations on the growth and quality of sweet pepper.

“…The cyanobacteria are a good source of several nutrients, such as fiber, minerals, proteins, vitamins and fatty acids, in comparison with other plants. Some important cyanobacteria varieties, that promote plant growth, are auxins, cytokinins and betaines (Khan et al 2009;Rodriguez et al, 2006;Asemgul et al, 2022). Cyanobacteria are found all over the world in earthbound, freshwater and marine living spaces, however, blossoms normally happen in freshwater.…”

Photosynthesis under Biotic and Abiotic Environmental Stress

“…Cyanobacteria are prokaryotic photosynthetic organisms with considerable agrobiotechnological potential. They are used to produce biofertilizers, and contribute significantly to plant drought resistance and nitrogen enrichment in soil [ 1 ]. Sadvakasova et al sought, isolated, and investigated nitrogen-fixing cyanobacterial strains in rice fields and evaluated the effect of Mo and Fe on photosynthetic and nitrogenase activities under nitrogen starvation.…”

“…J-14 (MZ079360), Oscillatoria brevis SH-12 (MZ090011), and Tolypothrix tenuis J-1 (MZ079361). The study of the influence of various concentrations of Mo and Fe on photosynthetic and nitrogenase activities under conditions of nitrogen starvation revealed the optimal concentrations of metals that stimulate the studied parameters [ 1 ].…”