Hairy root induction and phytoremediation of textile dye, Reactive green 19A-HE4BD, in a halophyte (L.) L.

In this study, we report phytoremediation of textile dyes using hairy roots derived through (NCIM 5140) infection of in vitro leaf and stem explants of a halophyte (L.) L. Leaf explants showed higher frequency of hairy root induction (70%) than stem explants (30%), and maximum number of roots (leaf 42.3 ± 2.4 and stem 50.3 ± 1.7). Transformed nature of hairy roots was ascertained by amplifying 970 bp region of T-DNA of Ri plasmid. Hairy roots were screened for phytoremediation of various textile dyes and results showed that HRs were able to degrade Reactive green 19A HE4BD upto 98% within 5 days of incubation. Spectrophotometric analysis showed decrease in dye concentration while HPLC and FTIR analysis confirmed its degradation. Seed germination assay demonstrated non-toxic nature of the extracted metabolites. This is the first report on induction of hairy root culture in and phytoremediation of textile dyes.