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Japanese-knotweed-seedlings_cropped.jpg

Invasive Japanese knotweed seedlings grow in petri dishes on agarose gel. The seedlings on the right are colonized by Micrococcus luteus, a type of bacterium that boosts growth in tomatoes but stunts growth in other types of plants. 

Image credits:

James White

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This image may be reproduced only with this Inside Science article.