Proceedings of the National Academy of Sciences of the United States of America · 2007
Enhanced phytoremediation of volatile environmental pollutants with transgenic trees.
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Doty Sharon L, James C Andrew, Moore Allison L, Vajzovic Azra, Singleton Glenda L, Ma Caiping, Khan Zareen, Xin Gang, Kang Jun Won, Park Jin Young, Meilan Richard, Strauss Steven H, Wilkerson Jasmine, Farin Federico, Strand Stuart E
Аннотация
Small, volatile hydrocarbons, including trichloroethylene, vinyl chloride, carbon tetrachloride, benzene, and chloroform, are common environmental pollutants that pose serious health effects. We have developed transgenic poplar (Populus tremula x Populus alba) plants with greatly increased rates of metabolism and removal of these pollutants through the overexpression of cytochrome P450 2E1, a key enzyme in the metabolism of a variety of halogenated compounds. The transgenic poplar plants exhibited increased removal rates of these pollutants from hydroponic solution. When the plants were exposed to gaseous trichloroethylene, chloroform, and benzene, they also demonstrated superior removal of the pollutants from the air. In view of their large size and extensive root systems, these transgenic poplars may provide the means to effectively remediate sites contaminated with a variety of pollutants at much faster rates and at lower costs than can be achieved with current conventional techniques.