Environmental change is one of the primary issues faced by the farming community. Low rainfall and high temperature in arid and semiarid regions lead to the development of secondary salinisation, thus making the problem more severe. Under saline conditions, sodium is the most crucial cation that competes with potassium (K) and adversely affects plant metabolism by inhibiting plant enzymatic activities. Potassium-solubilising bacteria (KSB) play a vital role in solubilising fixed potassium and making it accessible to plants. In the current study, 42 KSB strains were isolated from paddy rhizosphere soil grown under salt-affected conditions. The plant-growth-promoting (PGP) properties of these rhizobacteria were also evaluated. Thirteen KSB strains, positive for all tested PGP traits, were evaluated for potassium solubilisation under sodium stress, namely, 0%, 3%, 5% and 7% NaCl stress. The five best strains (Acinetobacter pittii strain L1/4, A. pittii strain L3/3, Rhizobium pusense strain L3/4, Cupriavidus oxalaticus strain L4/12 and Ochrobactrum ciceri strain L5/1) based on the K-solubilising potential were identified by amplification, sequencing and bioinformatic analysis of the 16S rDNA sequences. The maximum potassium solubilisation was measured at 30 °C and pH 7 with glucose as carbon source. The application of these KSB strains significantly improved the shoot length, fresh weight, dry weight and chlorophyll contents of paddy plants grown under saline conditions. Hence, these strains could be halotolerant KSB bioinoculants that can be used to protect plants against salt stress.

环境变化是农业社区面临的主要问题之一。干旱和半干旱地区的低降雨和高温导致次生盐渍化的发展，从而使问题更加严重。在盐分条件下，钠是与钾（K）竞争并通过抑制植物酶活性而不利地影响植物代谢的最关键的阳离子。钾增溶细菌（KSB）在溶解固定钾并使植物易于吸收中起着至关重要的作用。在当前的研究中，从受盐影响的水稻根际土壤中分离出42种KSB菌株。还评估了这些根瘤菌的促进植物生长（PGP）的特性。评估了13种KSB菌株（所有测试的PGP性状均为阳性）在钠胁迫下的钾增溶作用，即0％，3％，5％和7％NaCl应力。五个最佳菌株（通过扩增，测序和测序鉴定了基于K-增溶潜能的匹氏不动杆菌菌株L1 / 4，匹氏不动杆菌菌株L3 / 3，脓毒根瘤菌菌株L3 / 4，草酸铜杯菌菌株L4 / 12和奇异棒杆菌菌株L5 / 1）。 16S rDNA序列的生物信息学分析。以葡萄糖为碳源，在30°C和pH 7下测量了最大钾溶解度。这些KSB菌株的施用显着改善了在盐条件下生长的水稻植株的苗长，鲜重，干重和叶绿素含量。因此，这些菌株可以是可用于保护植物免受盐胁迫的耐盐KSB生物菌剂。