Creation of plants that efficiently absorb and remove formaldehyde in air by genetic engineering, and its application to ornamental foliage plants

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The two enzymes which are involved in the formaldehyde (HCHO) fixation in a methanol utilizing bacterium were expressed both in Arabidopsis (At) and tobacco. The obtained transformants showed an augmented capacity of absorbing HCHO and an enhanced tolerance to HCHO. Genome-wide analysis of the genes whose expression were affected in response to HCHO, gave clues to the mechanisms of toxicity of and tolerance to HCHO. The plasmids for the efficient expression of these enzyme genes in plants were constructed, and trials were made to obtain transgenic ornamental plants which will be useful for phytoremediation of HCHO-polluted indoor air.