## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**PGPR Strain** & \multicolumn{2}{c}{**Mode of Action**} & \multicolumn{2}{c}{**Plant (PGPR Isolated**} & \\  & & **from and/or Affected by PGPR)** & **Reference** \\ \hline _Azospirillum brasilense_ & - & Nitrogen biological fixation & & \\ (commercial inoculant) & - & IAA production & Maize & Hungria et al. [14] \\ \hline _Azotobacter viinelandii_ ATCC 12837 & - & Nitrogen fixation & & \\  & - & Production of siderophores, IAA, & Tomato & Conde-Avila et al. [15] \\  & & GA3, HCN, and vitamins & & \\ \hline _Pseudomonas aeruginosa, P. putida_, & - & Phosphate solubilization & & \\ _P. capsaicin_, & - & Production of siderophores, IAA, & - & [PERSON] and [PERSON], [16] \\ _P. fluorescens_ & & and HCN & & \\ \hline _Acinetobacter pittii_ & & & \\ (Accession No. MT974044), & - & Phosphate solubilization & & \\ _Acinetobacter oleiroanus_ & - & Potassium solubilization & & \\ (Accession No. MT974043), & - & Zinc solubilization & Durum wheat & [PERSON] et al. [17] \\ _Acinetobacter caloacetticus_ & - & Biological nitrogen fixation & & \\ (Accession No. MT974039), & - & IAA production & & \\ _Comomonas testosterone_ & - & & & \\ (Accession No. MT974042), & & & & \\ \hline _Lactococcus lactis_ (Genome accession No. JADBCD000000000), & & & & \\ _Enterococcus facium_ (Genome accession No. JADBCD000000000), & - & Phosphate and potassium & & \\ _Encyclococcus facium_ (Genome accession No. JADBCD000000000), & - & Antifungal activity & Wheat & [18] \\ _Bacillus velezensis_ FUA2155, & - & Antifungal activity & & \\ _Bacillus amyloidugefaciens_ Fad 82 & & & \\ \hline _Enterobacter asburiae_ & - & Phosphate solubilization & & [PERSON] et al. [19] \\ _Pseudomonas kareensis P. Iinti_ & - & Production of siderophores and IAA & & [19] \\ \hline _Enterobacter_ sp. & & & \\ (Accession No. KX209145) & & & & \\ _Pseudomonas_ sp. & & & \\ (Accession No. KX290125) & - & Phosphate solubilization & & \\ _Azotobacter droococcum_ & - & Production of siderophores and IAA & Barley, tomato, and & [PERSON] et al. [20] \\ (Accession No. KX209144) & - & Enzyme activity (ferric-chelate & cucumber & [20] \\ _Rhizobium_ sp. & & reductase) & & \\ (Accession No. KX209152) & & & & \\ _Staphylococcus_ sp. & & & \\ (Accession No. KX209174) & & & & \\ \hline _Bacillus tequilensis_ & - & Phosphate solubilization & & \\ _Variovorax paradoxus_ & - & Production of siderophores and IAA & & \\ _Acidovorax facilis_ & - & Nitrogenase and & & \\ _Leucobacter aridicollis_ & - & 1-aminocyclopropane-1-carboxylic & & [21] \\ _Streptomyces finicarius_ & & acid (ACC) deaminase activity & & \\ _Pseudomonas nitroreducncens_ & & & \\ \hline _Pseudomonas_ sp. & - & Heavy metal phytoremediation & & \\ (Accession No. GU550663) & - & Production of siderophores and IAA & & \\ \hline _Pantoea ananantis,_ & - & Phosphate and potassium & & \\ _Enterobacter_ sp. & & solubilization & Rice & \\ (commercial inoculant) & & & & \\ _Bacillus cereus,_ & & & \\ _B. megaterium_ & - & Potassium solubilization & Soybean & \\ (commercial inoculant) & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**PGPR Strain** & \multicolumn{2}{c}{**Mode of Action**} & \multicolumn{2}{c}{**Plant (PGPR Isolated**} & \multirow{2}{*}{**Reference**} \\  & & & **from and/or Affected by PGPR)** & \\ \hline _Pantoe agglomerans_ & & & \\ (Accession No. KT804413), & & & & \\ _Ralntella aqutilis_ & - & Potassium solubilization & Rice & [PERSON] et al. [24] \\ (Accession No. KM977991), & - & IAA production & & \\ _Pseudomonas orientalis_ & & & \\ (Accession No. KJ529081) & & & & \\ \hline _Bacillus licheniformis_ & & & \\ (Strain MSB29; Accession No. KF803996), & - & Potassium solubilization & Rice, banana, maize, & \\ _Pseudomonas azodermans_ & - & IAA production & sorghum, and wheat & \\ (Strain HSS-1; Accession No. KJ816640) & - & Phosphate solubilization & Tobacco & [PERSON] et al. [26] \\ \hline _Burchholderia cencopecia_ & - & Phosphate solubilization & Tobacco & [PERSON] et al.