In a recent study from UC Riverside researchers investigated whether black-eyed peas had lost any of their ability to attract Bradyrhizobium (nitrogen-fixing bacteria from the soil) and establish them inside nodules in the roots. As black-eyed peas are an important crop in many parts of the world, this ability may have been lost during domestication or selective breeding over centuries.  All plants need nitrogen in order to form the proteins needed for growth. If there is not enough nitrogen present, plants will not grow successfully. Although the...