Synergistic mitigation of lead [Pb(II)] stress in Triticum aestivum L. by heavy metal-tolerant plant growth-promoting (HMT-PGP) microbes and N-acetylcysteine (NAC).
Kumar A, Bhaskar M, Rani R
Phytoremediation
Wheat grown in soil near old industrial sites or heavily fertilized farmland can absorb lead into the grain that ends up in your bread — this research shows that adding specific beneficial bacteria plus a widely available antioxidant compound to the soil can cut that lead uptake by more than 20%.
Scientists grew wheat in water spiked with lead to mimic contaminated farmland, then tried giving the plants a mix of helpful bacteria and an antioxidant helper molecule called NAC. Together, these treatments made the wheat grow almost 47% longer roots and absorb far less lead into its leaves and shoots than untreated plants. The findings suggest we might be able to protect food crops on polluted land using natural, low-cost biological tools instead of costly soil removal or chemical treatments.
Key Findings
Combined treatment (microbes + NAC) increased wheat root length by 46.9% and total chlorophyll by 45.6% compared to lead-stressed, untreated plants.
The fraction of lead accumulating in the plant (bioconcentration factor) dropped from 0.74 in untreated plants to 0.58 with combined treatment, and the fraction moving to above-ground parts (translocation factor) fell from 0.16 to 0.095.
Seed germination and viability increased by 20.7% and 27.7% respectively with combined treatment, while oxidative damage markers like hydrogen peroxide and malondialdehyde declined significantly.
chevron_right Technical Summary
Combining beneficial soil bacteria with a supplement called N-acetylcysteine (NAC) significantly reduced lead absorption in wheat plants and boosted their growth under contaminated conditions. The paired treatment outperformed either approach alone, cutting the amount of lead that moved into plant tissues and improving plant health across multiple measures.
Abstract Preview
Synergistic application of N-acetylcysteine (NAC) and heavy metal-tolerant plant growth promoting (HMT-PGP)microbial consortia enhances Pb(II) phytostabilization and stress tolerance in Triticum ae...
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Wheat is a group of wild and domesticated grasses of the genus Triticum. As cereals, they are cultivated for their grains, which are staple foods around the world. Well-known wheat species and hybrids include the most widely grown common wheat, spelt, durum, emmer, einkorn, and Khorasan or Kamut....