Research

Molecular Biotechnology

, Volume 54, Issue 2, pp 292-303

The Xerophyta viscosa Aldose Reductase (ALDRXV4) Confers Enhanced Drought and Salinity Tolerance to Transgenic Tobacco Plants by Scavenging Methylglyoxal and Reducing the Membrane Damage

  • Deepak KumarAffiliated withSchool of Life Sciences, Jawaharlal Nehru University
  • , Preeti SinghAffiliated withSchool of Life Sciences, Jawaharlal Nehru University
  • , Mohd Aslam YusufAffiliated withSchool of Life Sciences, Jawaharlal Nehru University
  • , Chandrama Prakash UpadhyayaAffiliated withSchool of Life Sciences, Jawaharlal Nehru UniversityDepartment of Botany, Guru Ghasidas Central University
  • , Suchandra Deb RoyAffiliated withSchool of Life Sciences, Jawaharlal Nehru University
  • , Thomas HohnAffiliated withInstitute of Botany, University of Basel
  • , Neera Bhalla SarinAffiliated withSchool of Life Sciences, Jawaharlal Nehru University Email author 

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Abstract

We report the efficacy of an aldose reductase (ALDRXV4) enzyme from Xerophyta viscosa Baker in enhancing the prospects of plant’s survival under abiotic stress. Transgenic tobacco plants overexpressing ALDRXV4 cDNA showed alleviation of NaCl and mannitol-induced abiotic stress. The transgenic plants survived longer periods of water deficiency and salinity stress and exhibited improved recovery after rehydration as compared to the wild type plants. The increased synthesis of aldose reductase in transgenic plants correlated with reduced methylglyoxal and malondialdehyde accumulation and an elevated level of sorbitol under stress conditions. In addition, the transgenic lines showed better photosynthetic efficiency, less electrolyte damage, greater water retention, higher proline accumulation, and favorable ionic balance under stress conditions. Together, these findings suggest the potential of engineering aldose reductase levels for better performance of crop plants growing under drought and salt stress conditions.

Keywords

Abiotic stress Aldose reductase Methylglyoxal Transgenics Xerophyta viscosa