Ghoreshizadeh Seyedehtannaz, Calvo-Peña Carla, Ruiz-Muñoz Marina, Otero-Suárez Rebeca, Coque Juan José R, Cobos Rebeca
Instituto de Investigación de la Viña y el Vino, Escuela de Ingeniería Agraria, Universidad de León, 24009 León, Spain.
Plants (Basel). 2024 Jan 29;13(3):402. doi: 10.3390/plants13030402.
Most of the phosphorus incorporated into agricultural soils through the use of fertilizers precipitates in the form of insoluble salts that are incapable of being used by plants. This insoluble phosphorus present in large quantities in soil forms the well-known "phosphorus legacy". The solubilization of this "phosphorus legacy" has become a goal of great agronomic importance, and the use of phosphate-solubilizing bacteria would be a useful tool for this purpose. In this work, we have isolated and characterized phosphate-solubilizing bacteria from the rhizosphere of hop plants. Two particular strains, ULE-PH5 and sp. ULE-PH6, were selected as plant growth-promoting rhizobacteria due to their high phosphate solubilization capability in both plate and liquid culture assays and other interesting traits, including auxin and siderophore production, phytate degradation, and acidic and alkaline phosphatase production. These strains were able to significantly increase phosphate uptake and accumulation of phosphorus in the aerial part (stems, petioles, and leaves) of hop plants, as determined by greenhouse trials. These strains are promising candidates to produce biofertilizers specifically to increase phosphate adsorption by hop plants.
通过使用肥料进入农业土壤的大部分磷会以不溶性盐的形式沉淀，而这些盐类植物无法利用。土壤中大量存在的这种不溶性磷形成了众所周知的“磷遗留物”。使这种“磷遗留物”溶解已成为具有重大农学意义的目标，而使用解磷细菌将是实现这一目标的有用工具。在这项研究中，我们从啤酒花植物的根际分离并鉴定了解磷细菌。由于在平板和液体培养试验中具有高解磷能力以及其他有趣的特性，包括生长素和铁载体的产生、植酸盐降解以及酸性和碱性磷酸酶的产生，两种特定菌株ULE-PH5和ULE-PH6被选为植物促生根际细菌。温室试验表明，这些菌株能够显著增加啤酒花植物地上部分（茎、叶柄和叶片）对磷的吸收和积累。这些菌株有望成为专门用于增加啤酒花植物对磷吸收的生物肥料的生产候选菌株。
