Plants whose DNA is modified using genetic engineering techniques are known as transgenic plants. In most cases the aim is to introduce a new trait to the plant which does not occur naturally in this species. Examples include resistance to certain pests, diseases or environmental conditions, or the production of a certain nutrient or pharmaceutical agent. This book gathers and presents current research on transgenic plants including an examination of the release, persistence and transport of transgenic plant DNA in saturated and unsaturated mediums, such as soils and sediments; high-efficient plant cultivation with artificial light sources; the impact of three antibiotics on seed germination, hydroponic growth and nutritional qualities of vegetables; growth responses of Bt and non-Bt cottons to soil phosphorous, copper and cadmium levels; site-specific recombination systems for genome manipulation in transgenic plants; and amplification of small interfering RNAs in transgenic plants.