• PRIYANKA BEDI

      Articles written in Journal of Biosciences

    • Root transcripts associated with arsenic accumulation in hyperaccumulator Pteris vittata

      RASIKA M POTDUKHE PRIYANKA BEDI BIJAYA K SARANGI RAM A PANDEY SANJOG T THUL

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      Hyperaccumulation of arsenic (As) by brake fern Pteris vittata has been described as an important genetic trait that providesan option for development of a sustainable phytoremediation process for As mitigation. Accumulation of very highconcentration of arsenic in above-ground tissues may be the result of arsenic vacuole compartmentalization, but themechanism(s) of arsenic uptake and transport by underground tissues are largely unknown. In this study, we made anattempt towards understanding the molecular mechanism of As hyperaccumulation in this plant. A time-dependent Asaccumulation study indicates an exponential accumulation of As from 7 to 30 days of arsenic exposure in fronds, and day3–7 in roots. Root transcriptome analysis identified 554,973 transcripts. Further, subsets of 824 transcripts were differentiallyexpressed between treated and control samples. Many of the genes of critical As-stress response, transcriptionfactors and metal transporters, biosynthesis of chelating compounds involved in uptake and accumulation mechanisms wereidentified. The genes that were highly expressed such as cysteine-rich RLK, and ABC transporter G family member 26needs further studies along with arsenite transmembrane transporter. The analysis of generated transcriptome dataset hasprovided valuable information and platform for further functional studies.

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