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The trehalose utilization gene thuA ortholog in Mesorhizobium loti does not influence competitiveness for nodulation on Lotus spp
KTH, School of Biotechnology (BIO), Glycoscience.
2014 (English)In: World Journal of Microbiology & Biotechnology, ISSN 0959-3993, E-ISSN 1573-0972, Vol. 30, no 3, 1129-1134 p.Article in journal (Refereed) Published
Abstract [en]

Competitiveness for nodulation is a desirable trait in rhizobia strains used as inoculant. In Sinorhizobium meliloti 1021 mutation in either of the trehalose utilization genes thuA or thuB influences its competitiveness for root colonization and nodule occupancy depending on the interacting host. We have therefore investigated whether mutation in the thuA ortholog in Mesorhizobium loti MAFF303099 also leads to a similar competitive phenotype on its hosts. The results show that M. loti thuA mutant Ml7023 was symbiotically effective and was as competitive as the wild type in colonization and nodule occupancy on Lotus corniculatus and Lotus japonicus. The thuA gene in M. loti was not induced during root colonization or in the infection threads unlike in S. meliloti, despite its induction by trehalose and high osmolarity in in vitro assays.

Place, publisher, year, edition, pages
2014. Vol. 30, no 3, 1129-1134 p.
Keyword [en]
Competition, Host genotype, Nitrogen fixation, Nodule occupancy, Rhizobia
National Category
Biological Sciences
URN: urn:nbn:se:kth:diva-142778DOI: 10.1007/s11274-013-1527-6ISI: 000331101000037ScopusID: 2-s2.0-84893604013OAI: diva2:704679

QC 20140313

Available from: 2014-03-13 Created: 2014-03-12 Last updated: 2014-03-21Bibliographically approved

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Ampomah, Osei Y.
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