In the present study, phosphate solubilizing rhizobacterial isolate STJP from the rhizosphere of Stevia rebaudiana was identified as a Bacillus sp. on the basis of phenotypic, biochemical, and 16S rRNA gene sequencing. In addition to phosphate solubilization ability, isolate Bacillus sp. STJP produced a significant quantity of siderophore (16.06 µg/ml) and indole 3-acetic acid (30.59 µg/ml). In the greenhouse experiment, treatment with STJP along with tricalcium phosphate (TCP200) showed significant increase in the plant growth parameters, oil yield and P uptake in M. arvensis as compared to the control plants. Amongst all the treatments, highest oil yield and menthol content were observed when treated with Bacillus sp. STJP + TCP200. Hence, an integrated approach of using Bacillus sp. STJP along with TCP can be used to increase the production of menthol and oil yield of M. arvensis. This approach of using fertilizer along with phosphate solubilizing Bacillus sp. worked very well and was more effective in comparison with individual treatment of fertilizer or plant growth promoting rhizobacteria. A combined use of efficient phosphate solubilising bacteria loaded with plant growth promoting characters along with TCP can thus be far effective way for enhancing the yield of crops in a sustainable manner.

中文翻译：

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解磷芽孢杆菌属。增强薄荷的生长、磷吸收和油产量。

在本研究中，来自甜叶菊根际的解磷根际细菌分离株 STJP 被鉴定为芽孢杆菌属。基于表型、生化和 16S rRNA 基因测序。除了溶解磷酸盐的能力外，还分离出芽孢杆菌。STJP 产生大量铁载体 (16.06 µg/ml) 和吲哚 3-乙酸 (30.59 µg/ml)。在温室实验中，与对照植物相比，STJP 与磷酸三钙 (TCP200) 一起处理表明，M. arvensis 的植物生长参数、油产量和磷吸收量显着增加。在所有处理中，用芽孢杆菌处理时观察到最高的油产量和薄荷醇含量。STJP+TCP200。因此，使用芽孢杆菌属的综合方法。STJP与TCP一起使用可提高薄荷脑的薄荷醇产量和油产量。这种将肥料与解磷芽孢杆菌一起使用的方法。与肥料或促进植物根际细菌生长的单独处理相比，效果非常好并且更有效。因此，将具有植物生长促进特性的高效解磷细菌与 TCP 结合使用，可以成为以可持续方式提高作物产量的有效方法。