Ethanol Helps Plants Survive Drought

Bruce66423 shares a report from The Telegraph: Academics from Japan have found that ethanol helps make plants more drought-resistant (Warning: source paywalled; alternative source) and better able to survive an extended bout of dry weather. Experiments found that getting plants drunk helps crops flourish while sober plants become shrunken and disheveled. Plants lose water through their leaves when pores called stomata open to allow it to escape, but ethanol helps keep these closed, the scientists found, thus improving water retention. Genetic analysis of the plant also showed that plants switch on drought-fighting genes when ethanol is picked up by the roots. This not only stopped the loss of water through the vent-like stomata but also saw the plant activate a process where it actually uses the alcohol for fuel. Photosynthesis, the vital process that plants use to make energy from sunlight, needs water, but in the study, published in the journal Plant and Cell Physiology, the team found the plant can do this with ethanol instead in times of drought to further conserve dwindling supplies while also still making energy. This metabolizing of alcohol also means that shops would not be stocked with alcohol-infused foods if an alcohol-aided plant was harvested as it would have long ago been turned into energy by the plant. "There are some interesting questions to ask about WHY this pathway exists in plants," adds Slashdot reader Bruce66423. "The article doesn't talk about the concentration needed."

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