This timely and important book presents the essence of transgenic plant production. This activity is being pursued by many investigators and interesting results are rapidly accumulating. The basic methodologies have been developed and the transformation of additional plant species is more an ?engineering?/biotechnology problem than a matter of developing new scientific concepts. This book reviews the available methodologies and devotes chapters to transgenic plants that were produced for crop improvement and for yielding valuable products. Also, information is provided on the ability to regulate the expression of alien genes in specific organs and in response to defined effectors and environmental conditions.