Publications des scientifiques de l'IRD

Auguy Florence, Fahr M., Moulin Esmard Patricia, El Mzibri M., Smouni A., Filali-Maltouf A., Béna Gilles, Doumas P. (2016). Transcriptome changes in Hirschfeldia incana in response to lead exposure. Frontiers in Plant Science, 6, p. art. 1231 [13 p.]. ISSN 1664-462X.

Titre du document
Transcriptome changes in Hirschfeldia incana in response to lead exposure
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000368005500001
Auteurs
Auguy Florence, Fahr M., Moulin Esmard Patricia, El Mzibri M., Smouni A., Filali-Maltouf A., Béna Gilles, Doumas P.
Source
Frontiers in Plant Science, 2016, 6, p. art. 1231 [13 p.] ISSN 1664-462X
Hirschfeldia incana, a pseudometallophyte belonging to the Brassicaceae family and widespread in the Mediterranean region, was selected for its ability to grow on soils contaminated by lead (Pb). The global comparison of gene expression using microarrays between a plant susceptible to Pb (Arabidopsis thaliana) and a Pb tolerant plant (H. incana) enabled the identification of a set of specific genes expressed in response to lead exposure. Three groups of genes were particularly over-represented by the Pb exposure in the biological processes categorized as photosynthesis, cell wall, and metal handling. Each of these gene groups was shown to be directly involved in tolerance or in protection mechanisms to the phytotoxicity associated with Pb. Among these genes, we demonstrated that MT2b, a metallothionein gene, was involved in lead accumulation, confirming the important role of metallothioneins in the accumulation and the distribution of Pb in leaves. On the other hand, several genes involved in biosynthesis of ABA were shown to be up regulated in the roots and shoots of H. incana treated with Pb, suggesting that ABA-mediated signaling is a possible mechanism in response to Pb treatment in H. incana. This latest finding is an important research direction for future studies.
Plan de classement
Sciences du monde végétal [076]
Localisation
Fonds IRD [F B010066103]
Identifiant IRD
fdi:010066103
Contact