phasizing the problems by varying sites, soils, climates, rootstocks, and cultivars. FRC 6252-Advanced Tropical Fruit Crops Culture (3) Pre- req: FRC 4251. Assessment of major horticultural problems and application of research results to tropical fruit crop cul- ture. FRC 6256-Tropical Fruit Production and Research in Florida (3) A comprehensive study at the Agricultural Research and 'Education Center at Homestead and field locations in South Florida. (Students will be in residence for four weeks at the Center. Offered alternate years in SS.) HOS 5330-Commercial Harvesting and Postharvesting Handling of Horticultural Crops (1) Intensive study of cur- rent technological procedures used in the harvesting .and handling of vegetables, fruits, and ornamentals in Florida. S/U. HOS 5616-Agricultural Meteorology (2) Weather and cli- mate as they relate to agriculture; atmospheric radiation, macro- and micro-meterology, evapotranspiration, and re- mote sensing and its application to agriculture. HOS 6112-Morphology of Horticultural Crops (3) Prereq: BOT 5225. Morphological features of tropical and temperate zone horticultural crops, their modification by environment, and their relation to cultural practices and production prob- lems. Offered alternate (even numbered) years. HOS 6122-Taxonomy of Horticultural Crops (3) Prereq: BOT3303. Nomenclature, classification and identification of tropical and temperate zone horticultural crops, with em- phasis on the scientific basis and utility of the various sys- tematic methods. Offered alternate (odd numbered) years. HOS 6201-Breeding Perennial Cultivars (3) Prereq: AGR 3303. Methods of breeding perennial fruit and ornamental cultivars using mutations, cell and tissue culture, polyploidy, wide hybridization, and recurrent selection. The conserva- tion and domestication of wild plants. Offered alternate (odd numbered) years. HOS 6231-Biochemical Genetics of Higher Plants (3) Pre- req: AGR 3303 or PCB 3063 and BCH 4313 or equivalents. Discussion of current evidence bearing on gene function and regulation, examples of the use of plant mutants in the elucidation of biochemical pathways, and examination of somatic cell genetics in higher plants. Offered alternate (even numbered) years. HOS 6242-Genetics and Breeding of Vegetable Crops (2) Prereq: AGR 3303. Techniques for genetic analysis of quanti- tative characters and applied aspects of vegetable breeding. HOS 6311-Seed Physiology (3) Prereq: BOT 3503. Study of the dormancy, germination, growth, and development of seeds and the life processes involved; methods of handling and processing. Offered alternate (even numbered) years. HOS 6331-Postharvest Physiology (3) Prereq: BOT 3503 and VEC 4452, ORH 4263 or FRC 4612 or equivalent. Ad- vances in plant physiology and other areas of science ap- plied in quality maintenance and postharvest handling of fruit, vegetable, and ornamental crops. HOS 6343-Plant Stress Physiology (3) Prereq: BOT 5505C. Physiological basis of plant injury and survival during tem- perature, water, radiation, salt, and other environmental stresses. Offered alternate (odd numbered) years. HOS 6345--Environmental Physiology of Horticultural Crops (3) Prereq: BOT 3503 and consent of instructor. Horti- cultural crop physiology from a whole-plant viewpoint. In- fluence of environmental factors on photosynthesis, water movement, translocation, fruit set and yields. Offered alter- nate (even numbered) years. HOS 6351--Chemical Regulators of Horticultural Crops (3) Physiology and biochemistry of chemical regulators as re- lated to horticultural crops, with emphasis on manipulative practices. Offered alternate (even numbered) years. HOS 6361-Rootstock-Scion Relationships (3) Influence on disease susceptibilities, soil and climatic adaptations, budu- nion incompatibilities and production. Offered alternate (odd numbered) years. HOS 6412-Nutrition of Horticultural Crops (3) Prereq: BOT 3503 and ORH 4411 or FRC 4411, or equivalent. Physi- ological, biochemical and environmental factors influencing nutritional status of horticultural plants and the resulting ef- fects on growth, yield, and quality. HOS 6905-Nonthesis Research in Horticultural Science IMMUNOLOGY AND MEDICAL MICROBIOLOGY / 101 (1-4; max: 4) H. HOS 6910-Supervised Research (1-5; max: 5) S/U: HOS 6931-Horticultural Science Seminar (1; max: 3) Oral presentation of material in one of the following areas: liter- ature review related to the student's research, research re- sults, or a published paper of relevance to horticulture. Sub- Sject matter will be determined by the instructor. S/U. HOS 6932-Topics (2-4; max: 8) Study of contemporary re- search in horticultural science. HOS 6940-Supervised Teaching (1-5; max: 5) S/U. HOS 6941-Practicum in Horticultural Science (2-4; max: 8) Admission limited to graduate students majoring in horti- cultural science. Supervised and individual work in pro- fessional areas of horticulture. HOS 6971-Research for Master's Thesis (1-15) S/U. HOS 7979-Advanced Research (1-9) Research for doctoral students before admission to candidacy. Designed for stu- dents with a master's degree in the field of study or for stu- dents who have been accepted for a doctoral program. Not open to students who have been admitted to candidacy. S/U. HOS 7980-Research for Doctoral Dissertation (1-15) S/U. ORH 6223-Research and Development in Turfgrass Science (3) Prereq: ORH 4221 and lab. Principles and practices of turfgrass improvement and management, including propa- gation, nutrition,, physiology, soil management, and ex- perimental methods applied to turf research. VEC 6251-Advanced Olericulture (3) Prereq: BOT 3503. Sur- vey of scientific knowledge related to production of vegeta- ble crops. Offered alternate (odd numbered) years. IMMUNOLOGY AND MEDICAL MICROBIOLOGY College of Medicine GRADUATE FACULTY 1984-85 Chairman: J. B. Flanegan. Graduate Coordinator: W. K. Holloman: Professors: E. M. Ayoub; R. B. Crandall; D. H. Duckworth; E. P. Gibbs; G. E. Gifford; R. R. Gutekunst; R. E. Halliwell; E. M. Hoffmann; J:'E. McGuigan; J. T. Neilson; S. W. Russell; J. W. Shands; P. A. Small; R. S. Weiner. Associate Professors: M. D. Boyle; G. J. Elfenbein; J. B. Flanegan; W. W. Hauswirth; W. K. Holloman; L. 0. Ingram; W. P. McArthur; N. Muzyczka; R. S. Panush; K. H. Rand; J. L. Stein. Assistant Professors: D. J. Barrett; W. B. Clark; L. M. Hutt-Fletcher; M.J. Lawman; R. Ramphal; E. J. Siden; C. B. Walker. The. Department of Immunology and Medical Mi- crobiology offers a program leading to the Doctor of Philosophy degree in the medical sciences, with spe- cialization in immunology and medical microbiology. Specific areas of specialization include infectious diseases, cellular and humoral immunity, im- munochemistry, molecular genetics, parasitology, dental microbiology, and bacterial and animal vir- ology. The undergraduate preparation for graduate study should be wide in scope and should include general biology, physics, chemistry (two to three years, in- cluding organic and physical chemistry), and prefera- bly statistics, calculus, genetics, and bacteriology. A bachelor's degree in bacteriology or microbiology is not required. In graduate school the student will at first obtain a general background in microbiology as preparation for research and teaching. The remaining course work should be arranged according to the student's interests and competence. Through individ- ual planning of course work, research, and teaching, the graduate student is offered an educational atmo- sphere to help develop certain skills and gain intellec- tual independence and initiative.