Plant reproduction may be more dependent on gravity than once believed, according to a study published in the journal PLoS ONE. Scientists used simulated antigravity environments to study how plants might reproduce without the force. They discovered that intercellular transport, which is necessary for mating plants and communicating brain cells in humans, was affected by the lack of gravity. "If we ever want to do agriculture in space ... then we have to take this into account. In order to actually do long-term plant cultivation, we have to look for species that can actually reproduce under zero gravity conditions," wrote study researcher Anja Geitmann.

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