Heavy Metal Stress Management in Plants through Bio-Organic Amendments | [1st International Conference on "Recent Advances in Green Biotechnology and Climate Resilience", September 15-16, 2025 • 2025]

Author(s):

1. Iftikhar Ahmad: Deptt. of Environmental Sciences, COMSATS University Islamabad,Vehari Campus, Vehari-61100,Pakistan

2. Shehzad Mehmood: Deptt. of Biotechnology, COMSATS University Islamabad,Vehari Campus, Vehari-61100,Pakistan

3. Muhammad Atif Muneer: Int. Magnesium Institute, College of Resource and Environment, Fujian Agriculture & Forestry University,Fuzhou City,China

4. Aftab Jamal: Deptt. of Soil and Environmental Sciences, Faculty of Crop Production Sci., The University of Agriculture,Peshawar 25130,Pakistan

5. Amjad Farooq: Deptt. of Environmental Sciences, COMSATS University Islamabad,Vehari Campus, Vehari-61100,Pakistan

6. Umar Daraz: Center for Grassland Microbiome, and College of Pastoral Agriculture Science and Technology, Lanzhou University,Lanzhou, 730020,China

7. Ali Zakir: Deptt. of Environmental Sciences, COMSATS University Islamabad,Vehari Campus, Vehari-61100,Pakistan

8. Muhammad Farhan Saeed: Deptt. of Environmental Sciences, COMSATS University Islamabad,Vehari Campus, Vehari-61100,Pakistan

9. Allah Ditta: Deptt.of Environ. Sciences,SBBU, Sheringal, Dir (U), KPK, 18000,Pakistan

10. Adil Mihoub: Center for Scientific and Technical Research on Arid Regions, Biophysical Environment Station,Touggourt 30240,Algeria

Abstract:

Bio-organic amendments including plant growth-promoting rhizobacteria (PGPR), compost, biogas slurry, and biochar application may have the potential to significantly improve plant growth and modulate metal toxicity and their translocations to plants. The purpose of this study was to see how inoculating PGPR with organic amendments reduces physiological stress in crop plants by regulating metal uptake and the antioxidant defense system. PGPR was equipped with aminocyclopropane-1-carboxylate deaminase (ACC deaminase), exopolysaccharide (EPS), and indole acetic acid (IAA). PGPR was applied alone and combined with BGS to crop plants in a pot experiment subjected to metal concentrations in soil. Integrated use of PGPR and organic amendments significantly (P < 0.05) increased plant biomass (up to 44%), relative water contents (up to 15%), photosynthetic rate (up to 20%), and stomatal conductance (up to 11%) of crop plants under normal and metal stress conditions, respectively. Possibly, metal-induced production of reactive oxygen species resulted in increased electrolyte leakage and malondialdehyde contents, which led to a reduction in growth and physiology, however, such negative effects were ameliorated by the regulation of antioxidants. Lipid peroxidation is repaired by the crop plants through enhanced activities of ascorbate peroxidase and catalase antioxidants; however, the combination of PGPR and organic amendments modulate these parameters to mitigate metal stress on crop plants.

Page(s): 50-50

DOI: DOI not available

Published: Journal: 1st International Conference on "Recent Advances in Green Biotechnology and Climate Resilience", September 15-16, 2025, Volume: 1, Issue: 1, Year: 2025

Keywords:

phytotoxicity , Heavy metals , Bacillus sp , bioremediation , Antioxidants , Biogas residues

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