Another remarkable result of the current study was the finding of increased uptake of macronutrients (NPK) and enhanced chlorophyll content in PGPR-treated plants as compared with the SDW-treated plants, which in turn contributed to the increase in tomato growth and fruit weight (Table 2). PGPRs have been known to exert an array of beneficial responses on the host, including a significant increase in the primary growth of the plants. One of the major growth promoting effects of the PGPRs is the enhancement of nutrient uptake, including the NPK. Many reports have documented enhanced uptake of NPK upon PGPR treatment, such as those studied in tomato [55], eggplant [56] and peppermint [57]. The beneficial effects of PGPR treatment on nutrient uptake may be direct, such as improved modulation of the NPK through P solubilization and/or nitrogen fixing abilities [58] of PGPRs, or indirect as a consequence of enhanced root growth [10]. Additionally, the observed enhancement of chlorophyll content (Table 2) might lead to an enhanced photosynthesis in PGPR-treated tomato plants which together with the increase in NPK uptake might play a crucial role in enhancing the biomass of the tomato crop treated with PGPRs, subsequently leading to the increase in tomato fruit weight (Table 2). Another possible mechanism involved in improvement of plant growth and productivity might be attributed to the ability of rhizobacteria to colonize and proliferate in the roots (Table 1), and thus suppressing the deleterious microorganisms and phytopathogens by direct antagonism or induction of protection as reported earlier in a number of studies [9–11].