Ni hyperaccumulators among North Caucasian plant species of the tribe Alysseae, Brassicaceae

Abstract

Background. Heavy metals are dangerous industrial pollutants. Phytoremediation technology is a promising way to detoxificate polluted territories. Heavy metals hyperaccumulating plants present the base for development of these technologies. Many hyperaccumulators belong to the family Brassicaceae (mostly to the Alysseae tribe). Results. Analysis of molecular phylogeny and distribution of hyperaccumulation ability within the tribe Alysseae has been performed using sequences of the ITS1-5.8S rDNA-ITS2 region. Neighbor-joining tree has been reconstructed to investigate affinity within Alysseae species. For the first time molecular characters (variable region of the ITS2 structures and compensatory nucleotide substitutions availability) have been used to analyze phylogenetic structure of the tribe. Conclusion. Most of the known hyperaccumulators among species of the Alysseae tribe belong to the Odontarrhena section. ITS2 primary and secondary structure analysis results in the partition of the tribe Alysseae into five clades.

Keywords

Brassicaceae / Alysseae / Alyssum / ITS / hyperaccumulation / Brassicaceae / Alysseae / Alyssum / internal transcribed spacers / ITS / molecular phylogeny / secondary structure

RIGHTS & PERMISSIONS

Terent'eva L.Y., Krapivskaya E.E., Machs E.M., Rodionov A.V.