## Introduction
Only two bacterial endophytes increased plant biomass, but three of them delayed or reduced plant salinity stress symptoms. Interestingly, only one strain showed the ability to produce the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, which is involved in the increase in stress tolerance (_Pseudomonas brassicacarum_), suggesting that ACC deaminase is not the only physiological trait involved in conferring plant tolerance to salt stress in these bacterial strains, whose physiological activities are expressed directly inside the plants, making them a powerful tool in the development of sustainable agriculture. Considering the global threat of arable soil salinization, there is a profound interest in mitigating soil salinity that limits plant growth and productivity. In the study by [PERSON] et al. [7], published in this Special Issue, eighty-nine strains were isolated from the rhizosphere and endosphere of two halophyte species (_Suada mollis_ and _Salsola tetrandra_) collected from three chotts in Algeria. Also, in this case, the bacteria strains have been screened for diverse plant growth-promoting traits, antifungal activity and tolerance to different physico-chemical conditions (pH, PEG, and NaCl), to evaluate their efficiency in mitigating salt stress and enhancing the growth of _Arabidopsis thaliana_ and durum wheat under NaCl stress conditions. Three of those were finally selected and identified as _Bacillus atrophae_. The _bacterial strains_ (separately and combined) were then used for inoculating _Arabidopsis thaliana_ and durum wheat during the seed germination stage, under NaCl stress conditions. The results indicated that inoculation of both plant spp. with the bacterial strains, separately or combined, considerably improved the growth parameters, proving a superior approach to increase the chlorophyll and carotenoid contents, as compared to control plants. The mechanisms involved in the mitigation of plant response to salinity stresses have been reported and explored by [PERSON] et al. [8], in the review titled \"Plant-Growth-Promoting Bacteria Mitigating Soil Salinity Stress in Plants\". The mechanisms by which to promote plant access to nutrients, or improve their growth, include phytohormone generation, the dissolution of phosphate compounds, and the production of siderophores, among others. Special attention should be paid to the modulation of plant ethylene levels by utilizing the ACC as the sole carbon source of nitrogen, due to its overall impact on plant growth and development. Regulation in plant phytohormone signaling by PGPB is a promising process for boosting the yield. In addition, the combined possession of different traits has the most noticeable positive effect on plants when subjected to the stress of salinization. Finally, [PERSON] suggests using a PGPB consortium, since it presents multiple traits and may have more success in real conditions, as different mechanisms can be applied. [PERSON] et al. [9] confirmed that stated by [PERSON], that the use of PGPB must be considered in terms of application of bacterial _consortia_. Moreover, the study highlighted how PGPB's salinization mitigation effects can be enhanced by the use of chemical treatments (i.e., nutrient application). In fact, the benefits of durum wheat (_Triticum durum_ Desf.) treatment with a _consortium_ of four PGPBs is improved by the use of fertilizer, in terms of increase of the fraction of light absorbed by PSII antenna, PQ ratio and total quenching of chlorophyll fluorescence. A second review, \"Current Advances in Plant Growth Promoting Bacteria Alleviating Salt Stress for Sustainable Agriculture\", by [PERSON] et al. [10], was accepted to be published in the current Special Issue due to its focus on the use of PGPBs in agriculture, as a potential alternative to chemical fertilizers, biopesticides, and bioremediators under salt stress.