Santos ARS, Etto RM, Furmam RW, Freitas DLD, Santos KFDN, Souza EMD, Pedrosa FDO, Ayub RA, Steffens MBR, Galvão CW. Labeled Azospirillum brasilense wild type and excretion-ammonium strains in association with barley roots.
Plant Physiol Biochem 2017;
118:422-426. [PMID:
28711791 DOI:
10.1016/j.plaphy.2017.07.003]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 06/20/2017] [Accepted: 07/03/2017] [Indexed: 06/07/2023]
Abstract
Soil bacteria colonization in plants is a complex process, which involves interaction between many bacterial characters and plant responses. In this work, we labeled Azospirillum brasilense FP2 (wild type) and HM053 (excretion-ammonium) strains by insertion of the reporter gene gusA-kanamycin into the dinitrogenase reductase coding gene, nifH, and evaluated bacteria colonization in barley (Hordeum vulgare). In addition, we determined inoculation effect based on growth promotion parameters. We report an uncommon endophytic behavior of A. brasilense Sp7 derivative inside the root hair cells of barley and highlight the promising use of A. brasilense HM053 as plant growth-promoting bacterium.
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