corn

With its annual output of over 330 million tons a year feeding animals, running cars, and decorating South Dakota tourist attractions, maize is clearly Americas most important crop. That's why the newly published complete corn genome could drastically change the food, automotive and plastic industries.

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What do you do when you're under attack? Call for help, naturally. Unfortunately, if you're an ear of corn, and you're being attacked by parasitic beetle larvae, you have nothing to call for help with. Until now.

Scientists at the University of Missouri have genetically modified corn to release a chemical distress signal when under attack from beetle larvae. The chemical 911 call attracts droves of parastitic roundworms that naturally attack the larvae. Within three days of receiving the distress signal, the worms had killed them all.

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Common sense says that burning a plant you regrow every year is better for the atmosphere than spewing out carbon dioxide that’s been buried underground for eons. But the truth behind biofuels and petroleum often seems to defy common sense. Neither ethanol nor gasoline bubbles out of the ground ready to put in your tank. So to figure out which one does less environmental harm, you have to calculate all the energy that goes into making it.

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Move over, switchgrass. There's a new miracle crop on the horizon. Research at the University of Illinois at Urbana-Champaign indicates that a perennial grass named Miscanthus x giganteus can produce about two and a half times more ethanol per acre than either corn or switchgrass.

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"Cellulosic ethanol technology is a lot closer to reality than a lot of articles would have you think," said Jacques Beaudry-Losique, manager of the Department of Energy's Biomass Program this morning at the American Association for the Advancement of Science meeting. After some well-publicized studies stated that corn-based biofuels might exacerbate CO2 damage to the environment, focus has shifted to these so-called "second generation" biofuels that use non-food crops such as switchgrass, wood chips or crop residues (e.g. all the parts of the corn plant that are currently wasted after harvest--the stalk, leaves and "cob").

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Ethanol is a renewable, homegrown fuel that can help lower U.S. dependence on foreign oil. But as more and more ethanol is made from corn, less and less corn is available for food production, and that´s causing some unforeseen problems.

Corn is a mainstay of American agriculture- it´s an important ingredient in cereals and baked goods, and corn syrup is used to make processed foods like candy, chips and soft drinks. But most importantly, corn is the major source of food for cattle, pigs, turkeys and chickens that are headed for the dinner table.

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