Education Academic Positions Research Interests Present Research Present Students Courses Taught Memberships Grants Received Publications Back to Faculty

Bernard A. Hauser , Ph.D.

Associate Professor of Botany

• Undregraduate Coordinator
• Reproductive Biologist
• 516 A Batram Hall
• (352) 392-0009 (Voice)
• (352) 392-3993 (Fax)
  
• bahauser@botany.ufl.edu

Education

• 1987 B.A. Degrees in Biology and Chemistry, Washington University.
  
• 1995 Ph.D. Degree in Botany from the University of Georgia.
• Thesis title: Identification and Expression of Phytochrome Genes in Tomato (Lycopersicon esculentum Mill.).

Academic Positions

• 2003 Keenan National Tropical Botanical Garden Fellow
• 1999-present Assistant Professor, Plant Molecular and Cellular Biology Program
• 1999-present Assistant Professor, Department of Botany. University of Florida.
• 1995-1999 Post-doctoral researcher. Section of Molecular and Cellular Biology, University of California-Davis.

Research Interests / Major Research Achievements:

• Ovule morphogenesis
• Stress and ovule development

Present Research

During seed formation, the maternal tissues surrounding the growing embryo participate in critical processes, including fertilization, and nutrient uptake. In mature seeds, these same maternal tissues are critical for regulating germination, seed dormancy, seed stability and resistance to pathogen attach. I have identified genetic mutations that alter the development of this maternal tissue, leading to specific loss of seed structures and reduced seed set. One can predict the role that a gene might play in seed formation and physiology by thoroughly examining and analyzing the mutant phenotype. This type of description includes a microscopic examination of the mutant seed as it develops, identification of the alteration in the genetic code of the mutant and determining where the gene is expressed in the flower and seed. I have done this type of analysis for a mutation that lacks an embryo sac (the organ that contains the egg) and am working on other mutations that have reduced seed set. The genes that regulate seed development will provide valuable new tools for genetically manipulating crop improvement.

Present Students

Kelian Sun Ph.D.

Courses Taught:

• Introductory Plant Physiology
• Cells, Organisms, and Genetics
• Plant Physiology Laboratory
• Physiology and Molecular Biology of Plants
• Plant Reproductive Biology
• http://web.clas.ufl.edu/users/bahauser/BSC2007/
• http://web.clas.ufl.edu/users/bahauser/BOT3503/index.html
• http://web.clas.ufl.edu/users/bahauser/BOT3503/Labindex.html

Membership in Professional Organizations:

• American Society Plant Biologists
• American Society of Plant Physiologists
• American Association for the Advancement of Science
• Botanical Society of America
• International Society for Seed Science

Grants received

• USDA NRICGP, Mechanisms of stress-induced abortion of Arabidopsis thaliana ovules, $142,000
  

Selected Publications

Bernard A. Hauser, Kelian Sun, David G. Oppenheimer, and Tammy Sage (2006). Changes in mitochondrial membrane potential and accumulation of reactive oxygen species precede ultrastructural changes during ovule abortion. Planta , 223: 492-499.

Kelian Sun and Bernard A. Hauser (2005). Environmental stress alters gene expression and induces ovule abortion: reactive oxygen species emerge as ovules commit to abort. Planta, in press.

Matyas Buzgo, Douglas E. Soltis, Pamela S. Soltis, Hong Ma, Bernard A. Hauser, Jim Leebens-Mack, and Bo Johansen (2005). Perianth development in the basal monocot Triglochin maritime (Juncaginaceae). Proc. Monocots, in press.

Jean Broadhvest and Bernard A. Hauser (2005). “Genes Regulating Ovule Development,” a chapter in The Molecular Biology and Biotechnology of Flowering, edited by Brian R. Jordan. CABI Publishing, Oxfordshire, UK. In press.

Sangtae Kim, Jin Koh, Hong Ma, Yi Hu, Peter K. Endress, Bernard A. Hauser, Pamela S. Soltis, and Douglas E. Soltis (2005). Sequence and expression studies of A-, B-, and E-class MADS-box genes in Eupomatia (Eupomatiaceae): support for the bracteate origin of the calyptra. Intl. J. Plant Sci., 166: 185-198.

Sung Ok Park, Zhengui Zheng, David G. Oppenheimer, and Bernard A. Hauser (2005). The PRETTY FEW SEEDS2 locus encodes an Arabidopsis homeodomain protein that regulates ovule development. Development 132: 841-849.

Kelian Sun, Kimberly Hunt, and Bernard A. Hauser (2004). Ovule abortion in Arabidopsis thaliana triggered by stress. Plant Physiol. 135: 2358-2367.

Sung Ok Park, Soon Hwang, and Bernard A. Hauser (2003). The phenotype of Arabidopsis ovule mutants mimics an ancestral reproductive structure: telomes surrounding a sporangium. Proc. Royal Soc. London 271: 311-316

Bernard A. Hauser, Jeannie Q. He, Sung Park and Charles S. Gasser (2000). TSO1 is a novel protein that modulates cytokinesis and cell expansion in Arabidopsis. Development 127: 2219-2226

Jacinto M. Villanueva, Jean Broadhvest, Bernard A. Hauser, Robert J. Meister, Kay Schneitz and Charles S. Gasser (1999). INNER NO OUTER Regulates Abaxial/Adaxial Patterning in Arabidopsis Ovules. Genes and Development 13: 3160-3171.

Bernard A. Hauser, Jacinto M. Villanueva and Charles S. Gasser (1998). Arabidopsis TSOI Regulates Directional Processes in Cells During Floral Organogenesis. Genetics 150: 411-423.

Charles S. Gasser, Jean Broadhvest and Bernard A. Hauser (1998). Genetic Analysis of Ovule Development. Annual Review of Plant Physiology and Plant Molecular Biology 49: 1-24.

Bernard A. Hauser, Lee H. Pratt and Marie-Michele Cordonnier-Pratt (1998). Temporal and Light Regulation of the Expression of Five Phytochrome Transcripts in Tomato Seedlings and Plants. Plant Journal 14: 431-439

Bernard A. Hauser, Lee H. Pratt and Marie-Michele Cordonnier-Pratt (1997). Absolute quantification of five phytochrome transcripts in seedlings and mature plants of tomato (Solanum lycopersicum L.). Planta 201: 379-387.

L. Huub J. Kerckhoffs, Ageeth Van Tuinen, Bernard A. Hauser, Marie-Michele Cordonnier-Pratt, Akira Nagatani, Maarten Koornneef, Lee H. Pratt, Rick E. Kendrick (1996). Molecular analysis of tri-mutant alleles in tomato indicates the Tri locus in the gene encoding the apoprotein of phytochrome B1. Planta 199: 152-157.

Lee H. Pratt, Marie-Michele Cordonnier-Pratt, Bernard A. Hauser and Michel Caboche (1995). Tomato Contains Two Differentially Expressed Genes Encoding B-type Phytochromes, Neither of which Can Be Considered an Ortholog of Arabidopsis Phytochrome B. Planta 197: 203-206.

Bernard A. Hauser, Marie-Michele Cordonnier-Pratt, Francoise Vedele and Lee H. Pratt (1995). The Phytochrome Gene Family in Tomato Contains a Novel Subfamily. Plant Molecular Biology 29:1143-1155.

Rick E. Kendrick, L. Huub J. Kerckhoffs, A. S. Pundnees, Ageeth van Tuinen, Maarten Koorneef, Akira Nagatani, Mathew J. Terry, Andre Tretyn, Marie-Michele Cordonnier-Pratt, Bernard Hauser, Lee H. Pratt (1994). Photomorphogenic Mutants of Tomato. Euphytica 79: 227-234.

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