Microbial interaction of Actinobacteria strains with various plants, promote growth and development in natural farming, and alleviating biotic and abiotic stresses

Abstract Sustainable agricultural and horticultural systems which have potential to confront the demands of a rapidly changing world require to consider different aspects of the green agriculture system, and organic agriculture is more sustainable than conventional and traditional farming. Organic farming can contribute more to an increase in sustainable production in both agriculture and horticultural sciences. Compared to conventional agriculture, organic agriculture is capable of inducing sustainable crop productions and development by considering green agriculture. Plant growth-promoting rhizobacteria (PGPR) are widely known because of its noticeable plant growth regulators, and disease control agents in agricultural production and research. Actinomycetes are one of the main components of rhizosphere microbial populations which are useful in soil nutrient cycling as well as plant growth-promoting. They can also produce secondary metabolites, promote plant growth, control plant pathogens, and decompose organic matter. These parameters show its importance because of low production cost, eco-friendliness, and effectiveness. They can improve plant growth both directly, and indirectly such as suppression of pathogenic organisms. They have also shown high effectiveness in nitrogen fixation ability which can influence nitrogen, carbon, and photosynthesis metabolism. The goal of this manuscript is to study the importance of microbial interaction with horticultural and medicinal plants, and their effects on their growth and development in sustainable farming system by considering the functions of different genera of Actinomycetes such as Nocardia, Actinomyces, Actinomadura, Micromonospora, Streptomyces, and Streptosporangium. Graphical abstract