Unknown,Transcriptomics,Genomics,Proteomics

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Medicago truncatula roots. Nodulation vs. Arsenic

ABSTRACT: Legumes, in interaction with resistant rhizobia, combined both moderate tolerance and accumulation of metal(loids) in roots, with the ability to grow without nitrogen supply (Pajuelo et al., 2011). This quality has attracted attention for phytostabilisation of polluted soils (Reichman, 2007). Physiological studies suggest that low arsenite concentrations lead to a decrease of nodulation process (Dary et al., 2010; Pajuelo et al., 2008). Moreover, Lafuente et al. (2010) described a reduction in the expression patterns of nodulins genes in the presence of arsenite. Nevertheless, a global transcriptomic analysis has never been approached. In order to decipher the genetic regulation underlying the arsenite effect on the model symbiotic interaction Medicago-Sinorhizobium, we have performed a meta-analysis of three different hybridizations. These compare transcriptomic profiles of roots cultivated under different treatments (M-125 M-5M arsenite, M-1rhizobia).

ORGANISM(S): Medicago truncatula

SUBMITTER: Alejandro Lafuente 

PROVIDER: E-MTAB-1723 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Unraveling the effect of arsenic on the model Medicago-Ensifer interaction: a transcriptomic meta-analysis.

Lafuente Alejandro A   Pérez-Palacios Patricia P   Doukkali Bouchra B   Molina-Sánchez María D MD   Jiménez-Zurdo José I JI   Caviedes Miguel A MA   Rodríguez-Llorente Ignacio D ID   Pajuelo Eloísa E  

The New phytologist 20140923 1

The genetic regulation underlying the effect of arsenic (As(III)) on the model symbiosis Medicago-Ensifer was investigated using a combination of physiological (split-roots), microscopy and genetic (microarrays, qRT-PCR and composite plants) tools. Nodulation was very sensitive to As(III) (median inhibitory dose (ID50) = 20 μM). The effect on root elongation and on nodulation was local (nonsystemic). A battery of stress (salt, drought, heat shock, metals, etc.)-related genes were induced. Glutat  ...[more]

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