Plant growth-promoting bacteria (PGPB) and silicon (Si) can augment salinity tolerance in plants. In this study, 25 potential PGPB were isolated from alfalfa rhizosphere and screened for their ability to synthesize indole-3-acetic acid, 1-aminocyclopropane-1-carboxylate deaminase, and solubilize tricalcium phosphate. Two promising strains were tentatively identified as Pseudomonas pseudoalcaligenes (KB-10) and P. putida (KB-25) based on phenotypic, biochemical and 16S rRNA gene phylogeny. Subsequently, a pot experiment was conducted to evaluate the effectiveness of KB-10 and KB-25 treatment, alone or in combination with Si fertilizer, in alleviating salinity stress in coriander. The results showed that treatment with PGPB strains and/or Si significantly increased relative water content, concentrations of photosynthetic pigments, peroxidase activity, total biomass, salt tolerance index, and reduced salt-induced total phenolic contents. Overall data suggested that the combined application of PGPB and Si fertilizer could be a feasible and effective approach to improve growth and salinity tolerance in coriander.

促进植物生长的细菌（PGPB）和硅（Si）可以增强植物的耐盐性。在这项研究中，从苜蓿根际中分离出25种潜在的PGPB，并筛选了它们合成吲哚-3-乙酸，1-氨基环丙烷-1-羧酸脱氨酶和溶解磷酸三钙的能力。初步确定了两个有希望的菌株：假单胞菌假拟杯假单胞菌（KB-10）和恶臭假单胞菌。（KB-25）基于表型，生化和16S rRNA基因系统发育。随后，进行了盆栽试验，评估了单独或与硅肥配合使用KB-10和KB-25处理减轻香菜中盐分胁迫的有效性。结果表明，用PGPB菌株和/或Si处理显着提高了相对水含量，光合色素的浓度，过氧化物酶活性，总生物量，耐盐指数，并降低了盐诱导的总酚含量。总体数据表明，PGPB和硅肥的联合施用可能是提高香菜生长和耐盐性的一种可行而有效的方法。