Rising CO2 promotes weedy rice

Undesirable variants preferentially thrive — and cross with cultivated rice, transforming the crop into weeds

By Janet Raloff, 10:12 AM May 25, 2012

There has been a lot of research, recently, showing how global change — especially warming — can alter the habitat and preferred range of marine and terrestrial species. But rising levels of greenhouse gases can also, directly, do a number on agricultural ecosystems, a new study shows. At least for U.S.-grown rice, rising carbon dioxide levels give a preferential reproductive advantage to the weedy natural form — known colloquially as red rice (for the color of its seed coat).

Agriculture Depa...

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