Root plant to fuel the process. In return, the plant takes nitrogen compounds produced from ammonia by the bacteria. The term root crops refers to any edible underground plant structure, but many root crops are actually stems, such as potato tubers. Edible roots include cassava, sweet potato, beet, carrot, rutabaga, turnip, parsnip, radish, yam and horseradish. Spices obtained from roots include sassafras, angelica, sarsaparilla and licorice. Sugar beet is an important source of sugar. Yam roots are a source of estrogen compounds used in birth control pills. The fish poison and insecticide rotenone is obtained from roots of "Lonchocarpus" spp. Important
Plant root exudates the "Arabidopsis" seedlings were capable of detecting the exudates around them and responding accordingly. Researchers speculate that this ability may be beneficial for fitness, allowing plants to allocate fewer resources to competition when grown amongst kin. While there is a legitimate current understanding of root exudates, further research and experimentation is still necessary to fully understand these mechanisms and how they may differ depending on the contents of exudates. Plant root exudates Plant root systems can grow to be complex due to a variety of species and microorganisms existing in a common soil. Plants have adapted to respond to the