Plant growth promoting bacteria’ (PGPB) beneficial role on plant tolerance to salinity stress has previously been well recognized. However, bacteria-triggered plant physiological mechanisms involved in this response require investigation, especially in plants with innate salt tolerance. A glasshouse experiment was designed to investigate the effect of the PGPB Vibrio spartinae on Halimione portulacoides growth, physiological performance and ion homeostasis in plants exposed to 0, 171, 510 and 1020 mM NaCl for 100 days. Bacterial inoculation alleviated ~28% of the deleterious impact of salinity excess on the relative growth rate (RGR) in plants grown at 510 mM and led to 30% and 44% enhancements in those exposed to 0 and 171 mM NaCl, respectively. This effect was linked to a reduction in Na tissue concentrations which improved plant ion homeostasis at elevated NaCl concentration, and to the overall protective effects on various steps in the photosynthetic pathway between 0 and 510 mM NaCl. Thus, inoculated plants were able to maintain higher net photosynthesis (A_N) than their non-inoculated counterparts. Hence, A_N differences under saline conditions were ascribed to inoculation amelioration NaCl-induced CO₂ diffusion limitations, as reflected in the greater g_s and C_i values recorded at 171 and 510 mM NaCl, together with an enhancement of photochemical apparatus functionality (in terms of energy absorption, transformation and transport), as indicated by a higher electron transport rate (ETR) and energy fluxes derived from Kautsky curves, compared with their non-inoculated counterparts.

先前已经广泛认识到植物生长促进细菌（PGPB）对植物耐盐胁迫的有益作用。但是，涉及此反应的细菌触发的植物生理机制需要研究，特别是在具有先天耐盐性的植物中。设计了一个温室实验来研究PGPB斯巴德纳弧菌对金缕梅的影响暴露于0、171、510和1020 mM NaCl 100天的植物的生长，生理性能和离子体内平衡 细菌接种减轻了盐分过量对以510 mM生长的植物的相对生长率（RGR）的有害影响，约28％，分别使暴露于0和171 mM NaCl的植物的盐分提高了30％和44％。该作用与Na组织浓度的降低有关，NaCl浓度的升高改善了NaCl浓度升高时植物离子的动态平衡，并且与对0至510 mM NaCl之间的光合作用路径中各个步骤的总体保护作用有关。因此，接种植物比未接种植物能维持更高的净光合作用（A _N）。因此，A _N盐水条件下的差异归因于接种改善NaCl诱导的CO ₂扩散限制，这反映在171和510 mM NaCl上记录的更大的g _s和C _i值，以及光化学装置功能的增强（就能量吸收而言） ，转化和输运），与未接种的对应物相比，电子输运率（ETR）和根据考茨基曲线得出的能量通量更高。