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Properties of Astragalus sp. microsymbionts and their putative role in plant growth promotion.
- Source :
-
Archives of microbiology [Arch Microbiol] 2016 Oct; Vol. 198 (8), pp. 793-801. Date of Electronic Publication: 2016 May 21. - Publication Year :
- 2016
-
Abstract
- The plant growth-promoting rhizobacteria have developed many different (indirect and direct) mechanisms that have a positive effect on plant growth and development. Strains isolated from Astragalus cicer and Astragalus glycyphyllos root nodules were investigated for their plant growth-promoting properties such as production of indole-3-acetic acid (IAA) and siderophores, phosphate solubilization, ACC deaminase activity, and tolerance to heavy metals. IAA production and P-solubilization were frequent features in the analysed strains, while siderophores were not produced by any of them. In this work, we investigated the presence of the acdS genes and ACC deaminase activities in Astragalaus cicer and A. glycyphyllos microsymbionts, classified within the genus Mesorhizobium. The results demonstrated that the acdS gene is widespread in the genome of Astragalus sp. microsymbionts; however, none of the tested strains showed ACC deaminase activity. The acdS gene sequence similarity of the analysed strains to each other was in the range from 84 to 99 %. On the phylogram of acdS gene sequences of milkvetch, the symbionts clustered tightly with the genus Mesorhizobium bacteria.
- Subjects :
- Carbon-Carbon Lyases genetics
Ethylenes metabolism
Indoleacetic Acids metabolism
Mesorhizobium genetics
Metals, Heavy metabolism
Plant Development
Plant Roots microbiology
Rhizobium genetics
Rhizobium isolation & purification
Siderophores metabolism
Symbiosis
Astragalus Plant microbiology
Carbon-Carbon Lyases metabolism
Mesorhizobium isolation & purification
Mesorhizobium metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1432-072X
- Volume :
- 198
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Archives of microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 27209414
- Full Text :
- https://doi.org/10.1007/s00203-016-1243-3