Differential responses of sweetpotato peroxidases to heavy metals

Chemosphere
Yun-Hee KimSang-Soo Kwak

Abstract

Oxidative stress is one of the major causes of damage in plants exposed to different types of environmental stress, including heavy metals. Accumulation of heavy metals in plants can disrupt many cellular functions and plant growth. To assess the contribution of oxidative stress to heavy metal toxicity in plants, young sweetpotato plants (Ipomoea batatas) were treated with increasing concentrations of Cd, Cu and Zn, and grown in half Murashige and Skoog nutrient solution culture. Plant growth was significantly inhibited and internal metal content was increased in a dose-dependent manner for each metal. The generation of H(2)O(2) in leaves and fibrous roots correlated positively with metal dose. The specific activity of peroxidases (PODs) in fibrous roots was markedly enhanced by metal treatment, whereas in leaves, activity was low and only slightly affected by metal treatment. Analysis of 13 POD genes revealed differential expression of PODs in response to heavy metals. Several genes for acidic PODs (swpa2, swpa3 and swpa4) and basic PODs (swpb1, swpb3 and swpab4) were strongly expressed under all metal treatment conditions in leaves or fibrous roots. The expression of swpa1 was increased in leaves and fibrous roots by Cd and C...Continue Reading

References

May 5, 2001·Plant Science : an International Journal of Experimental Plant Biology·A HegedüsG Horváth
May 9, 2002·Journal of Experimental Botany·Andres Schützendübel, Andrea Polle
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Kozi Asada
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Graham Noctor, Christine H. Foyer
Apr 28, 2005·Plant Cell Reports·F PassardiC Dunand
Sep 18, 2007·Plant Physiology and Biochemistry : PPB·Yun-Hee KimSang-Soo Kwak
Dec 18, 2008·Journal of Experimental Botany·Claudia Cosio, Christophe Dunand

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Citations

Apr 19, 2013·Proteomics·Bruno PrintzJean-Francois Hausman
Jan 7, 2015·Plant Physiology and Biochemistry : PPB·Jeung Joo LeeSang-Soo Kwak
May 21, 2016·Frontiers in Plant Science·Ann CuypersEls Keunen
Apr 8, 2017·Environmental Science and Pollution Research International·Beata Smolinska, Joanna Leszczynska
Apr 3, 2020·Environmental Science and Pollution Research International·Xingqing ZhaoDing Tang
Jan 16, 2021·Ecotoxicology and Environmental Safety·Fasih Ullah HaiderMuhammad Farooq

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