Analysis of cadmium root retention for two contrasting rice accessions suggests an important role for OsHMA2
Articolo
Data di Pubblicazione:
2021
Citazione:
Analysis of cadmium root retention for two contrasting rice accessions suggests an important role for OsHMA2 / M. Maghrebi, E. Baldoni, G.A. Lucchini, G. Vigani, G. Valè, G.A. Sacchi, F.F. Nocito. - In: PLANTS. - ISSN 2223-7747. - 10:4(2021 Apr 20). [10.3390/plants10040806]
Abstract:
Two rice accessions, Capataz and Beirao, contrasting for cadmium (Cd) tolerance and root
retention, were exposed to a broad range of Cd concentrations (0.01, 0.1, and 1 M) and analyzed for
their potential capacity to chelate, compartmentalize, and translocate Cd to gain information about
the relative contribution of these processes in determining the different pathways of Cd distribution
along the plants. In Capataz, Cd root retention increased with the external Cd concentration, while
in Beirao it resulted independent of Cd availability and significantly higher than in Capataz at the
lowest Cd concentrations analyzed. Analysis of thiol accumulation in the roots revealed that the
different amounts of these compounds in Capataz and Beirao, as well as the expression levels of
genes involved in phytochelatin biosynthesis and direct Cd sequestration into the vacuoles of the root
cells, were not related to the capacity of the accessions to trap the metal into the roots. Interestingly,
the relative transcript abundance of OsHMA2, a gene controlling root-to-shoot Cd/Zn translocation,
was not influenced by Cd exposure in Capataz and progressively increased in Beirao with the
external Cd concentration, suggesting that activity of the OsHMA2 transporter may differentially
limit root-to-shoot Cd/Zn translocation in Capataz and Beirao.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Oryza sativa L.; cadmium; zinc; cadmium translocation; cadmium root retention
Elenco autori:
M. Maghrebi, E. Baldoni, G.A. Lucchini, G. Vigani, G. Valè, G.A. Sacchi, F.F. Nocito
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