Preface Importance of Biotechnology to the Horticultural Plant Industry (Robert W. Harriman, Jyothi Prakash Bolar, and Franzine D. Smith) Ornamental Plant Transformation (Mark H. Brand) Molecular Phylogeny-Assisted Breeding of Ornamentals (Takashi Handa, Koichi Kita, Pheravut Wongsawad, Yuji Kurashige, and Tomohisa Yukawa) Improvement of Cold Tolerance in Horticultural Crops by Genetic Engineering (Eung-Jun Park and Tony H. H. Chen) Engineering for Drought Tolerance in Horticultural and Ornamental Plants: Lessons from the Studies with Model Plants (Qingxi J. Shen and Jian Wang) Transgenic Approaches to Disease Resistance in Ornamental Crops (John Hammond, Hei-Ti Hsu, Qi Huang, Ramon Jordan, Kathryn Kamo, and Margaret Pooler) Genetic Engineering Approach to Enhance Adventitious Root Formation of Hardwood Cuttings (Zong-Ming Cheng, Wenhao Dai, Michael J. Bosela, and Lori D. Osburn) Flowering (Annalisa Giovannini) Plant Shape: Molecular Aspects of Leaf Morphogenesis (Gyung-Tae Kim) Improvement of Horticultural and Ornamental Crops Through Transgenic Manipulation of the Phytochrome Family of Plant Photoreceptors (Keara A. Franklin and Garry C. Whitelam) Problems and Challenges of Invasive Ornamental Plants and Molecular Tools to Control Their Spread (Yi Li, Zongming Cheng, William Smith, Donna Ellis, Yongqin Chen, Litang Lu, Richard J. McAvoy, Yan Pei, Wei Deng, Chandra Thammina, Xuelian Zheng, Hui Duan, Keming Luo, and Degang Zhao) Metabolic Engineering of Flower Color in Ornamental Plants: A Novel Route to a More Colorful World (Carlo Rosati and Philippe. Simoneau) Metabolic Engineering of Floral Scent of Ornamentals (Natalia Dudareva and Eran Pichersky) Auxin, Cytokinin and Abscisic Acid: Biosynthetic and Catabolic Genes and Their Potential Applications in Ornamental Crops (Hui Duan, Yi Li. Yan Pei, Wei Deng, Ming Luo, Yuhua Xiao, Keming Luo, Litang Lu, William Smith, Richard J. McAvoy, Degang Zhao, Xuelian Zheng, and Chandra Thammina) Molecular Biology of the Metabolism and Signal Transduction of Gibberellins, and Possible Applications to Crop Improvement (Masanobu Mino, Mariko Oka, Yasushi Tasaka, and Masaki Iwabuchi) Ethylene: Current Status and Future Directions of Using Transgenic Techniques to Improve Flower Longevity of Ornamental Crops (Kenichi Shibuya and David G. Clark) The Economics of Horticultural Biotechnology (Julian M. Alston, Kent J. Bradford, and Nicholas Kalaitzandonakes) Challenges to Commercial Use of Transgenic Plants (Richard Meilan) Risk, Trust, and Consumer Acceptance of Plant Biotechnology: Implications for Genetically Modified Ornamental Plants (W. E. Klingeman and C. R. Hall) Index Reference Notes Included