Impact of dual inoculation with Rhizobium and PGPR on growth and antioxidant status of Vicia faba L. under copper stress

Comptes rendus biologies
Imen Challougui FatnassiSalwa Harzalli Jebara

Abstract

Plant-growth-promoting bacteria (PGPR) may help reduce the toxicity of heavy metals in plants in polluted environments. In this work, the effects of dual inoculation with Rhizobium and PGPR strains on the growth of Vicia faba grown under copper stress were assessed during hydroponic culture. Growth parameters, copper (Cu) accumulation and antioxidant enzyme activities were studied. Copper concentrations above 1mM damaged plant growth, but co-inoculation reduced its harmful effect. Co-inoculation of plants treated with 1mM Cu and 2mM Cu increased the dry weights as compared with Cu-treated and uninoculated plants. However, it decreased copper uptake up to 80% in the roots of 1-mM-Cu-treated plants as compared to non-inoculated control. Copper tolerance in Vicia faba is linked to the activity of antioxidant systems that are modulated by metal concentrations: both superoxide dismutase (SOD) and catalase (CAT) were higher in the presence of Cu; a lower Cu dose of 0.5mM stimulated ascorbate peroxidase (APX) and/or peroxidase (POX) activities in shoots and roots; however in nodules CAT appeared to be the main peroxidase in H2O2 scavenging. The 1mM Cu treatment enhanced SOD, CAT and APX activities in roots and only SOD and POX were ac...Continue Reading

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Citations

May 10, 2016·International Journal of Phytoremediation·FengYu LiXuPing Xu
Aug 4, 2018·Environmental Science and Pollution Research International·Sumei YuJuanjuan Qu
Nov 27, 2019·Journal of the Science of Food and Agriculture·Rakesh K SharmaGayatri Archana
Nov 19, 2019·Applied Microbiology and Biotechnology·Sabrina IbañezElizabeth Agostini
Jan 7, 2021·Environmental Science and Pollution Research International·Hamid Reza KavousiMahmoud Ghorbanzadeh Neghab
Nov 12, 2020·Plants·Arafat Abdel Hamed Abdel LatefMona Fawzy Abu Alhmad

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