The plant microbes are colonizing the phyllosphere, rhizosphere, and endophytes. The beneficial association the plants help by different ways including solubilization of minerals, production of growth regulators (phytohormones) and bioactive compounds that are useful to kill the pathogenic organisms under the natural as well extreme conditions. Plant microbiomes have been sorted out from all three domains (Eukarya, bacteria, and Archaea) with some dominant members of Acidobacteria, Actinobacteria, Bacteroidetes, Chlorobi, Chloroflexi, Deinococcus-Thermus, Firmicutes, Fusobacteria, Planctomycetes, Proteobacteria, Spirochaetes, Verrucomicrobia, Ascomycota, Basidiomycota, Crenarchaeota, and Euryarchaeota. Plant microbes have been reported worldwide to promote plant growth either directly (by fixation of nitrogen, solubilization of minerals such as phosphorus, potassium, zinc selenium, iron, copper, manganese; production of bioactive compounds, Fe-chelating compounds-siderophores and various phytohormones-auxin, gibberellic acids and cytokinins) or indirectly (via production of bioactive compounds and antagonistic substances). Due to the diverse range of PGP attributes, the plant microbiomes as single or in consortium may provide an important resource as biopesticides and biofertilizers to reduce the chemicals fertilizers for agricultural sustainability.
Key words: Agricultural sustainability, Diversity, Plant microbiome, Plant-microbe interactions, Sustainable development
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