Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing, 100191, China.
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China.
Curr Microbiol. 2022 Apr 9;79(5):150. doi: 10.1007/s00284-022-02777-w.
Iron deficiency is a major global agricultural problem. Siderophores can help organisms to uptake iron in form of siderophore-Fe complexes and then in the cell cytosol, iron is reducted and released in ferrous form. This research aimed to obtain some efficient siderophore-producing bacterial strains and evaluate their plant growth-promoting effects in the iron-deficit environment. Two strains, Brucella sp. E7 and Pseudomonas brassicae W7, were isolated from rhizosphere soil. Both strains could produce maximum siderophores under the optimal conditions. Plant promoting experiment showed that many indicators of Vigna radiata seedling were all increased significantly by strain E7/W7 or the consortium of E7 + W7. Under no-iron and high iron stress, the inoculation treatment also showed growth promotion effects on both Vigna radiata and Lolium multiflorum. These results indicated that the potential ability of strain E7 and W7 in increasing agricultural production as a growth-promoting agent in iron-deficit soil.
缺铁是一个全球性的农业问题。铁载体可以帮助生物以铁载体-铁复合物的形式摄取铁，然后在细胞质中，铁被还原并以亚铁形式释放。本研究旨在获得一些高效的产铁载体细菌菌株，并评估它们在缺铁环境中的植物促生作用。从根际土壤中分离到两株菌，布鲁氏菌 E7 和假单胞菌 W7。这两株菌在最佳条件下均可产生最大量的铁载体。植物促生实验表明，菌株 E7/W7 或 E7+W7 混合菌处理均能显著提高豇豆幼苗的多项指标。在无铁和高铁胁迫下，接种处理对多花黑麦草和豇豆的生长也有促进作用。这些结果表明，菌株 E7 和 W7 具有作为促生剂在缺铁土壤中提高农业产量的潜力。
