. Opening these pores can let water evaporate out. In the desert,
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, where water is in short supply, some plants use a different network of chemical reactions to make energy: crassulacean acid metabolism, or CAM.
Plants that use CAM open pores in their leaves only during the cooler nighttime,
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, when water is less likely to evaporate out. They store the CO2 they take in until daytime,
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, when they close the pores and convert the CO2 into food.
“Our goal is to move this metabolic trick into crop plants,
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,” says John Cushman,
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, a biochemist at the University of Nevada, Reno. “In order to do that, you have to understand the complexity of all the enzymes and regulatory components associated with the circadian clock of the plant.”
Cushman’s team has collected vast omic datasets from CAM plants. He estimates that several hundred genes coordinate the process, turning each other on and off and producing proteins that interact with each other and influence other genes.
His team is trying to engineer the plant Arabidopsis (a weed often used for genetic experiments) to use CAM by inserting the relevant genes into the plant. If they can get it to work in this small lab plant,
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, the researchers want to do the same in poplar trees to help grow biofuel sources in harsh environments not usually suitable for agriculture. Someday, Cushman hopes,
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, the technology will help food crops grow better in arid climates.
Better than a hunch
So far,
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, collecting and integrating omic data is largely restricted to the lab?—?the work is still expensive

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