Cotton plants can clean up heavy metal pollution, but variety choice matters
Noaman AH, Al-Issawi MH, Hasan AI, Mohammed YA, Polesny Z
Phytoremediation
Fields near old industrial sites or heavily fertilized farmland often carry cadmium and lead that quietly enter food crops, and planting the right cotton variety could pull those metals out of the soil before the next food crop goes in.
Some cotton plants are better than others at soaking up dangerous metals like cadmium and lead from polluted soil. Scientists compared six cotton varieties and found that Cocker310 was particularly good at absorbing and moving these metals from roots to leaves, which is how phytoremediation works. They also pinpointed two genes that control how the plant handles these metals internally, which could help breeders develop even more effective cleanup varieties.
Key Findings
Cocker310 showed the strongest cadmium and lead removal, while W888 and Spearo888 also accumulated high cadmium levels.
Cadmium was more mobile and easier to remove from soil than lead across all six cotton genotypes tested.
Two genes, GhHMA1 and PCS1, were upregulated under heavy metal stress and govern metal translocation and intracellular storage respectively.
chevron_right Technical Summary
Researchers tested six cotton varieties for their ability to pull toxic cadmium and lead out of contaminated soil. They found that specific genotypes, especially Cocker310, are significantly better at this job, and identified the genes responsible for moving and storing these metals inside the plant.
Abstract Preview
Original paper
Biochemical and molecular response of heavy metals phytoremediation in cotton genotypes.
Heavy metal pollution is major environmental and public health concern because of the widespread toxicity of metals such as Cd and Pb. Using cotton crops for phytoremediation offers sustainable and...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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