Soil heavy metal pollution is one of the major global environmental problems. The heavy metal contaminated soil can be absorbed into the food chain crops, seriously affecting food security and endanger human health. Phytoremediation genetic engineering is important ways to solve the heavy metal pollution, which find and discover withstand heavy metal poisoning and excess accumulation of heavy metals in the regulation of key genes and to elucidate its mechanism of action, from the source of the genetic engineering of plants to be successful and repair agricultural food safety control key. Recently, relevant research group of Professor Explorative Hefei University published online in the International Botanical renowned journal Plant Physiology.
The way forward genetic screening study, identified a mutant of Arabidopsis resistance to cadmium, the use of biotechnology cloning the corresponding gene mutation, found that the gene encodes a transcription factor ZAT6, it can be specifically incorporated directly into the control glutathione GSH synthesis plant precursors ie chelate pigment, a key promoter of synthetic genes on and coordinate related gene expression of glutathione-dependent activation of the plant hormone synthesis pathway on chelation, thereby increasing the plants chelate pigment synthesis, and ultimately improve plant Cd accumulation and tolerance.
"Therefore, the use of overexpression ZAT6 transgenic technology to increase the Cd accumulation and tolerance of plants, providing new genetic resources and technical means for heavy metals contaminated soil phytoremediation genetic engineering." Cao Shuqing said the application of this gene in remediation of Cd contaminated soil has gained intellectual property rights. It can be extended in other large biomass plants.
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