Differential sulphur assimilation mechanism regulates response of Arabidopsis thaliana natural variation towards arsenic stress under limiting sulphur condition

Journal of Hazardous Materials
Ria KharePrabodh K Trivedi

Abstract

Arsenic (As) is a ubiquitous element, which imposes threat to crops productivity and human health through contaminated food chain. As a part of detoxification mechanism, As is chelated and sequestered into the vacuoles via sulphur containing compounds glutathione (GSH) and phytochelatins (PCs). Under limiting sulphur (LS) conditions, exposure of As leads to enhanced toxic effects in plants. Therefore, it is a prerequisite to understand molecular mechanisms involved in As stress response under sulphur deficiency conditions in plants. In recent years, natural variation has been utilized to explore the genetic determinants linked to plant development and stress response. In this study, natural variation in Arabidopsis has been utilized to understand the molecular mechanisms underlying LS and As(III) stress response. Analysis of different accession of Arabidopsis led to the identification of Koz2-2 and Ri-0 as the most tolerant and sensitive accessions, respectively, towards As(III) and LS+As(III) stress. Biochemical analysis and expression profiling of the genes responsible for sulphur transport and assimilation as well as metal detoxification and accumulation revealed significantly enhanced sulphur assimilation mechanism in Koz2-...Continue Reading

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Citations

Oct 6, 2017·Environmental Science and Pollution Research International·Chao RenHongqing Hu
Jun 23, 2018·Frontiers in Plant Science·Smita Kumar, Prabodh K Trivedi
Apr 24, 2021·Environmental Science and Pollution Research International·Martina GrifoniMeri Barbafieri
Jun 21, 2021·Chemosphere·Aditi Shreeya Bali, Gagan Preet Singh Sidhu

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