Transgenic poplar expressing Arabidopsis NDPK2 enhances growth as well as oxidative stress tolerance

Plant Biotechnology Journal
Yun-Hee KimSang-Soo Kwak

Abstract

Nucleoside diphosphate kinase 2 (NDPK2) is known to regulate the expression of antioxidant genes in plants. Previously, we reported that overexpression of Arabidopsis NDPK2 (AtNDPK2) under the control of an oxidative stress-inducible SWPA2 promoter in transgenic potato and sweetpotato plants enhanced tolerance to various abiotic stresses. In this study, transgenic poplar (Populus alba × Poplus glandulosa) expressing the AtNDPK2 gene under the control of a SWPA2 promoter (referred to as SN) was generated to develop plants with enhanced tolerance to oxidative stress. The level of AtNDPK2 expression and NDPK activity in SN plants following methyl viologen (MV) treatment was positively correlated with the plant's tolerance to MV-mediated oxidative stress. We also observed that antioxidant enzyme activities such as ascorbate peroxidase, catalase and peroxidase were increased in MV-treated leaf discs of SN plants. The growth of SN plants was substantially increased under field conditions including increased branch number and stem diameter. SN plants exhibited higher transcript levels of the auxin-response genes IAA2 and IAA5. These results suggest that enhanced AtNDPK2 expression affects oxidative stress tolerance leading to improved...Continue Reading

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Citations

Jan 23, 2016·Plant Physiology and Biochemistry : PPB·Qingbo KeSang-Soo Kwak
Nov 7, 2015·Trends in Plant Science·Mike R Allwright, Gail Taylor
Jan 10, 2014·Journal of Integrative Plant Biology·Haitao Shi, Zhulong Chan
Nov 15, 2014·Plant Physiology and Biochemistry : PPB·Hongbing LiSang-Soo Kwak
Sep 23, 2014·Plant Physiology and Biochemistry : PPB·Zhi WangSang-Soo Kwak
Oct 18, 2012·Plant Signaling & Behavior·Richa Pasrija, Jitendra K Thakur
Oct 8, 2013·Plant Science : an International Journal of Experimental Plant Biology·Joseph G DubouzetArmin Wagner
Jun 27, 2014·Naunyn-Schmiedeberg's Archives of Pharmacology·Sonia Dorion, Jean Rivoal
Aug 28, 2016·Plant Biotechnology Journal·Qingbo KeSang-Soo Kwak
Oct 11, 2016·Plant Physiology and Biochemistry : PPB·Zhi WangSang-Soo Kwak
Apr 30, 2017·Zeitschrift Für Naturforschung. C, a Journal of Biosciences·Hani Al-Ahmad

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