Rhizosphere Microbiomes of Amaranthus spp. Grown in Soils with Anthropogenic Polyelemental Anomalies

Abstract

Study of rhizospheric microbial communities of plants growing under different environmental conditions is important for understanding the habitat-dependent formation of rhizosphere microbiomes. The rhizosphere bacterial communities of four amaranth cultivars were investigated in a laboratory pot experiment. Amaranthus tricolor cv. Valentina, A. cruentus cv. Dyuimovochka, and A. caudatus cvs. Bulava and Zelenaya Sosulka were grown for six months in three soils with different anthropogenic polyelemental anomalies and in a background control soil. After the plant cultivation, the rhizosphere soils were sampled and subjected to metagenomic analysis for the 16S rRNA gene. The results showed that the taxonomic structure of the amaranth rhizosphere microbiomes was represented by the dominant bacterial phyla Actinobacteriota and Proteobacteria. A feature of the taxonomic profile of the rhizobiomes of A. tricolor cv. Valentina and A. cruentus cv. Dyuimovochka was a large abundance of sequences related to Cyanobacteria. The formation of the amaranth rhizosphere microbiomes was largely unaffected by soils, but cultivar differences in the formation of the amaranth rhizosphere microbial structure were revealed. Bacterial taxa were identified that are possibly selected by amaranths and that may be important for plant adaptation to various habitat conditions. The targeted enrichment of the amaranth rhizosphere with members of these taxa could be useful for improving the efficacy of amaranth use for agricultural and remediation purposes.

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“…The content of Zn in plant biomass was determined by atomic absorption spectroscopy as reported previously [ 41 ].…”

Biochemical Composition, Nutritional Values, and Calorie Content of Allium Species: A Systematic Review

“…Phytoremediation has contaminants removed from the soil using crop plants. Soil phytoremediation from organic and inorganic pollutants is evident based on plant-microbial interactions, and the presence of microorganisms resistant to pollutants promoted plant growth in the plant rhizosphere (Muratova et al, 2023). Garlic has the potential to absorb and hyper-accumulate heavy metals.…”

Net Photosynthesis and Biomass Production in Stevia, Eggplant, and Cowpea Can Be Improved by Fertilization with Cyanobacteria (Limnospira maxima)

“…However, studies regarding cyanobacteria's impact on plant growth and development are lacking [22,23]. Given their potential benefits for biofertilizers and sustainable agriculture, both cyanobacterial biomass and extracts, such as those from L. maxima, hold promising potentials for use in food production [24].…”