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Quantitative real-time expression profiling of aquaporins-isoforms and growth response of Brassica juncea under arsenite stress

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Abstract

The present study analyzed the expression level of aquaporins of plasma membrane intrinsic protein (PIP) class in response to arsenite (AsIII) exposure of 100 μM from 0.5 h to 8 days in Brassica juncea. The expression levels of most of the PIPs were down-regulated during the course of AsIII exposure. This led to decrease in total water content of plants, which in turn hampered seedling growth. The level of reactive oxygen species (superoxide radicals and hydrogen peroxide), lipid peroxidation and root oxidizability increased significantly upon exposure to AsIII as compared to that of control leading to an increase in cell death. The study proposes that the down-regulation of PIPs happened presumably to regulate AsIII levels, which, however, occurred at the cost of reduced growth, disturbed water balance and induced oxidative stress.

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Correspondence to P. Suprasanna.

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Srivastava, S., Srivastava, A.K., Suprasanna, P. et al. Quantitative real-time expression profiling of aquaporins-isoforms and growth response of Brassica juncea under arsenite stress. Mol Biol Rep 40, 2879–2886 (2013). https://doi.org/10.1007/s11033-012-2303-7

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