“…Over the time, various researchers have classified biostimulants into nine broad categories including seaweeds and plant extracts, complex organic materials (obtained from sewage sludge extracts, composts, manure urban and agro-industrial waste products), humic substances, antitranspirants (kaolin and polyacrylamide), chitin and chitosan derivatives, elements (Al, Co, Se, Na, and Si), hydrolyzed proteins, nitrogen-containing compounds and microbial inoculants ( Colla and Rouphael, 2020 ; Teklić et al., 2021 ; Franzoni et al., 2022 ; Monteiro et al., 2022 ). Out of this wide category, microbial-based biostimulants including plant growth-promoting bacteria ( Bacillus, Serratia, Arthrobacter, Pseudomonas, Rhodococcus, Enterobacter, Ochrobactrum, Acinetobacter, Azospirillum, Rhizobium, Streptomyces and Stenotrophomonas ) have surfaced as highly valuable and inexpensive agricultural input for improving plant yield ( Orozco-Mosqueda et al., 2020 ; Baltazar et al., 2021 ; Miceli et al., 2021 ; Ayed et al., 2022 ; Fadiji et al., 2022 ). These microbiome based biostimulants trigger plant growth through solubilization of minerals (Zn, P and K), nitrogen fixation, production of phytohormones like indole-3-acetic acid (IAA), abscisic acid (ABA), ethylene (ET), cytokinin (CK), jasmonic acid (JA), secondary metabolites (siderophores, N-acyl homoserine lactone, lipopeptides, rhamnolipids, cyclic lipopeptides), enzymes (chitinases, cellulose, protease, glucanase etc.…”