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Quite interesting, but not entirely right. The papers got over-excited in 2009 by the paper Murderous plants: Victorian Gothic, Darwin and modern insights into vegetable carnivory by Chase et al. when it mentioned wild tomatoes possibly catch small insects. It’s a good paper, but it’s not strong evidence for a killer tomato. Instead it could be evidence for proto-carnivory, which might be a step on the way to becoming a carnivorous plant.
However, in 2010 PLOS One published Turning the Table: Plants Consume Microbes as a Source of Nutrients by Paungfoo-Lonhienne et al. Paungfoo-Lonhienne’s team found that roots from Tomato (and Arabidopsis) absorbed microbes, and then broke them down in the roots. The clever bit was tagging the Nitrogen in the microbes with 15N. When the plant’s leaves were tested a couple of weeks later, the team found elevated levels of 15N in the leaves, showing the nutrients had moved from the microbes into the plant tissues and the microbe had been eaten.
Which shows there is such a thing as a killer tomato.