Alan G. Smith
- Ph.D. University of Florida, 1985, Plant Pathology
- M.S. Iowa State University, 1981, Microbiology
- B.S. University of Nebraska, 1978, Microbiology and Chemistry
Plant Development; Reproduction; Non-Native Invasive Plants; Propagation; Biotechnology
Dr. Smith researches the biology of plant reproduction and uses that understanding for plant improvement. Reproduction is essential for the production of most seeds and fruits and is used in plant breeding to introduce new traits. The interactions between pollen and pistil regulate pollen tube growth, which controls fertilization and seed production.
Dr. Smith’s studies in prezygotic reproductive barriers that occur between Nicotiana species have elucidated a new mechanism by which pollen tube growth is regulated. Facilitating or inhibiting pollen tube growth by the pistil is important to maintaining species as well as the evolution of new species. A combination of approaches is being employed including reverse genetics, introduction of altered genes, gene knockouts, cell ablation, mutagenesis and protein purification and identification. An understanding of plant reproduction has direct application to managing pollination and fertilization for seed production, controlling gene flow between crops, enabling wide crosses among species where barriers prevent fertilization and preventing seed and fruit set.
Dr. Smith is employing genetic modification and mutagenesis breeding to control the production of seed by non-native invasive plants. Invasive plants are of increasing concern due to their negative economic and environment impacts. Invasive plants are considered one of the least reversible of all human impacts on the environment. Dr. Smith collaborates with industry to produce seedless varieties of popular but invasive non-native landscape plants. He is a graduate faculty member of the Plant Biological Sciences and the Applied Plant Sciences graduate programs and is a member of Microbial and Plant Genomics Institute.
- McGinnis, E.E., A.G. Smith, M.H. Meyer. 2014. A post-floral initiation chilling treatment controls dichogamy sequence in Carex pensylvanica. Hort Tech in press.
- McGinnis, E.E., A.G. Smith, M.H. Meyer. 2014. A post-floral initiation chilling treatment controls dichogamy sequence in Carex pensylvanica. Hort Tech accepted.
- Smith, A.G., C.A. Eberle, N.O. Anderson, B.M. Clasen, A.D. Hegeman. 2013. The transmitting tissue of Nicotiana tabacum is not essential to pollen tube growth, and its ablation can reverse prezygotic interspeciﬁc barriers. Plant Reprod 26:339-350.
- Eberle, Carrie A, Neil O Anderson, Benjamin M Clasen, Alan G Smith. 2013. PELPIII the Class III Pistil-Specific Extensin-Like Nicotiana tabacum protein is essential for interspecific incompatibility. The Plant Journal, published online: 4 APR 2013, DOI: 10.1111/tpj.12163.
- Wolf, V.C., A. Gassmann, B.M. Clasen, A.G. Smith, C. Müller. 2012. Genetic and chemical variation of Tanacetum vulgare in plants of native and invasive origin. Biological Control. 61:240-245.
- McGinnis, E.E., M. Meyer and A.G. Smith. 2012. Analysis of U.S. Genetically Engineered Crop Regulation and Litigation. Crop Sci. 52:991-1002.
- Eberle, C.A., B.M. Clasen, N. O. Anderson and A. G. Smith. 2012. A novel pollen tube growth assay utilizing a transmitting tract-ablated Nicotiana tabacum style. Sexual Plant Reproduction 25:27-37.
- Smith A.G. and B.M. Clasen. 2011. Development of seedless taxa of popular invasive landscape plants. Combined Proceedings International Plant Propagators’ Society 60: 69-77.
- Clasen, B.M, N.G. Moss, M.A. Chandler, A.G. Smith. 2011. Genetic Diversity Within and Among Populations of Common Tansy (Tanacetum vulgar). Canadian J. Plant Biology 91:717-723.
- McGinnis, E. E., M. H. Meyer and A. G. Smith. 2010. Sweet and Sour: A Scientific and Legal Look at Herbicide-Tolerant Sugar Beet. Plant Cell 22: 1653-1657. (10.1105/tpc.110.077198).
- Chen C., Farmer A.D., Langley R.J., Mudge J., Crow J.A., May G.D., Huntley J., Smith A.G., Retzel E.F. 2010. Meiosis-specific gene discovery in plants: RNA-seq applied to isolated Arabidopsis male meiocytes. BMC Plant Biol. 10(1):280.
- McNeil, K.J. and A.G. Smith. 2009. A glycine-rich protein that facilitates exine formation during tomato pollen development. Planta 231: 793-808.
- Gardner, N., R. Felsheim and A.G. Smith. 2009. Production of male- and female-sterile plants through reproductive tissue ablation. J. Plant Physiol. 166: 871-881.