Courses Taught
HORT 8150. Plant Growth and Development. 3 credit hours, Graduate level course on the growth and development of plants with emphasis on issues of interest in economic crop development. Topics covered include: cell enlargement and growth, polarity, dormancy, seed germination, meristem and leaf development, shoot growth patterns, juvenility and maturity, pollination and flowering, fruit set and development, and environmental effects on growth and development.
HORT 3620. Plant Propagation. 3 credit hours (lecture and lab). Undergraduate level course on the principles and practices for increasing plant numbers with emphasis on the anatomical and physiological basis for various methods. Propagation methods include use of cuttings, grafting, modified stems and roots, layering, seed, tissue culture and genetic engineering.
Selected Publications
Woo, S. M. and H. Y. Wetzstein. 2007. Morphological and Histological Evaluations of In Vitro Regeneration in Elliottia racemosa Leaf Explants Induced on Media with Thidiazuron. J. Amer. Soc. Hort. Sci. (in press)
Woo, S. M. and H. Y. Wetzstein. 2007. An Efficient Tissue Culture Regeneration System for Georgia Plume, Elliottia racemosa, a Threatened Georgia Endemic. HortScience (in press)
Pickens, K, J. Wolf, J.M. Affolter and H. Y. Wetzstein. 2006. Adventitious bud development and regeneration in Tillandsia eizii. In Vitro Cell. Dev. Biol. Plant 42:348-353.
Brevis, P. A., D. S. Nesmith, H. Y. Wetzstein and D.B. Hausman. 2006. Production and viability of pollen and pollen-ovule ratios in four rabbiteye blueberry cultivars. J. Amer. Soc. Hort. Sci. 131:181-184.
Brevis, P. A., D. S. Nesmith, and H. Y. Wetzstein 2006. Flower age affects fruitset and stigmatic receptivity in rabbiteye blueberry. HortScience 41:1537-1540.
Law, S. Edward and Hazel Y. Wetzstein. 2006. Ambient ozone concentrations measured in floricultural greenhouses. ASABE Paper No. 064099, American Society of Agricultural & Biological Engineers Internat. Conf., Portland, OR. 12 pp.
Orozoco-Obando, W., G.N. Hirsch and H.Y. Wetzstein. 2005. Genotypic variation in flower induction and development in Hydrangea macrophylla. HortScience 40:1695-1698.
Kim, T. R. and H. Y. Wetzstein. 2005. Seasonal fluctuations in nutrients and carbohydrates in pecan leaves. J. Hort. Sci. Biotechnology 80: 681-688.
Yi, W., S. E. Law, D. McCoy and H.Y. Wetzstein. 2005. Stigma development and receptivity in almond (Prunus dulcis). Annals Botany 97:57-63.
Yi, W., S.E. Law and H.Y. Wetzstein. 2003. Pollen tube growth in styles of apple and almond flowers after spraying with pesticides. J. Hort. Sci Biotechnol.73(6):842-846.
Yi, W., S.E. Law and H.Y. Wetzstein. 2003.Fungicide sprays can injure the stigmatic surface during receptivity in almond. Annals of Botany 91: 335-341.
Pretova, A., B. Obert and H.Y. Wetzstein. 2003. Substrate infiltration and histological fixatives affect the in situ localization of beta-glucuronidase activity in transgenic tissue. Acta Biotechnologica 23(4): 383-388.
Yi, W., S.E. Law and H.Y. Wetzstein. 2003. Polyester and nylon powders used
as pollen diluents preserve pollen germination and tube growth in controlled
pollinations. Sexual Plant Reprod. 15: 265-269.
Kim, T. and H.Y. Wetzstein. 2003. Cytological and ultrastructural evaluation
of zinc deficiency in leaves. J. Amer. Soc. Hort. Sci. 128:171-175.
Yi, W., S.E. Law and H.Y. Wetzstein. 2003. An in vitro study of fungicide
effects on pollen germination and tube growth in almond. HortScience 38:1068-1088
Pickens, K.A. J.M. Affolter, J. H.D. Wolf and H. Y. Wetzstein. 2003. Enhanced
germination and seedling growth of Tillandsia eizzi in vitro. HortScience 38:101-104.
Wetzstein, H. Y. and Y. He. 2002 Alterations in anatomy and ultrastructure
of leaves treated with a triazole fungicide, propiconazole, during shoot development.
J. Amer. Soc. Hort. Sci. 127:8-12.
Yi, W., S.E. Law and H.Y. Wetzstein. 2003. Fungicide sprays can injure the stigmatic
surface during receptivity in almond flowers. Annals of Botany 91:335-341.
Wetzstein, H.Y and C.S. Vavrina. 2002. Morphological evaluation of apical meristem decline in greenhouse-grown tomato transplants and the effect of nutrition on its occurrence. J. Amer. Soc. Hort. Sci.127:635-638.
Kim, T. R., H. A. Mills and H.Y. Wetzstein. 2002. Studies on the effect of zinc supply on the growth and nutrient uptake of pecan. J. Plant Nutrition. 25(9):1987-2000.
Kim, T. R., H. A. Mills and H. Y. Wetzstein. 2002. Studies on the effect of nitrogen form on growth, development and nutrient uptake of pecan. J. Plant Nutrition 25(3)497-508.
Wetzstein, H. Y. and Y. He. 2002 Alterations in anatomy and ultrastructure of leaves treated with a triazole fungicide, propiconazole, during shoot development. J. Amer. Soc. Hort. Sci. 127:8-12.
Pretova, A., B. Obert and H.Y. Wetzstein. 2001. Leaf developmental stage and tissue location affect the detection of B-glucuronidase in transgenic tobacco plants. Biotechnology Letts. 23:555-558.
Vendrame, W., G. Kochert, D. Sparks and H. Y. Wetzstein. 2000. Field performance and molecular evaluation of pecan trees regenerated from somatic embryogenic cultures. J. Amer. Soc. Hort. Sci. 125:542-546.
Magbauna, Z, H. D. Wilde, J. K. Roberts, K. Chowdhury, J. Abad, J. M. Moyer, H. Y. Wetzstein and W.A. Parrott. 2000. Field resistance to tomato spotted wilt virus in transgenic peanut (Arachis hypogaea L.) Expressing an antisense nucleocapsid gene sequence. Molecular Breeding 6:227-236.
Law, S. E., S. Banerjee. H. Y. Wetzstein, D. Eisikowitch. 2000. Electrostatic application of pollen sprays: Effects of charging field intensity and aerodynamic shear upon deposition and germinability. Inst. Electrical Electronics Engin./Indust. Applic. Soc. Transactions 36(4):998-1009.
Sommer, H. E., H. Y. Wetzstein and C. L. Brown. 1999. Shoot growth and histological response of dwarf sweetgum to gibberellin.. J. Horticultural Sci. Biotechnology 74(5):618-621.
Eisikowitch, D. And H. Y. Wetzstein. 1999. The enhancement of pollen germination by promotive factors in incompatible pollen. Israeli J. Plant Physiol. 47:165-168.
Sommer, H. E., C. L. Brown and H. Y. Wetzstein. 1999. The influence of intermittent soil drying on the growth, cell number, and final cell length in the pith of mature internodes in Helianthus annus and Liquidambar styraciflua L. Plant and Soil 210:51-59.
Vendrame, W. A., G. Kochert and H. Y. Wetzstein. 1999. AFLP marker analysis of somaclonal variation in pecan (Carya illinoinensis) somatic embryogenic cultures. Plant Cell Rep 18:853-857.
Jeyaretnam, B., A. Levi, S. C. Phatak and H. Y. Wetzstein. 1999. Changes in growth, water content and protein reflect embryo development in pecan (Carya illinoensis). J. Horticultural Sci. Biotechnology 74:315-320.
Kim, T. R., M. K. U. Chowdhury and H. Y. Wetzstein. 1999. A quantitative and histological comparison of GUS expression with different promoters constructs used in microprojectile bombardment of peanut leaf tissue. In Vitro Cell Dev. Plant: 35:51-56.
Rodriguez, A. P. M. and H. Y. Wetzstein. 1998. A morphological and histological comparison of the initiation and development of pecan somatic embryogenic cultures induced with NAA or 2,4-D. Protoplasma 204:71-83.
He, Y., A. Levi, and H. Y. Wetzstein. 1998. Sequence and developmental expression of a seed storage protein gene in pecan. J. Horticultural Science and Biotechnology 73(6):828-830.
Burns, J. A. and H. Y. Wetzstein. 1998. Embryogenic cultures of the leguminous tree Albizzia julibrissin and recovery of plants. Plant Cell Tiss. Org. Cult. 54:55-59.
Baker, C. M. and H. Y. Wetzstein. 1998. Leaflet development, induction time, and medium influence somatic embryogenesis in peanut (Arachis hypogaea). Plant Cell Reports 17:925-929.He, Y. And H. Y. Wetzstein. 1997. Improved structural preservation and immunolocalization of the microtubule cytoskeleton in plant and animal cells by freeze substitution/fixation. Methods in Cell Sci. 19:91-100.
Burns, J. A. and H. Y. Wetzstein. 1997. Development and characterization of embryogenic suspension cultures of pecan. Plant, Cell, Tissue and Organ Culture 48:93-102.
He, Y., B. A. Palevitz and H. Y. Wetzstein. 1996. Pollen germination, tube growth and morphology, and microtubule organization of after exposure to benomyl. Physiologia Plantarum 95:39-44.
H. Y. Wetzstein. 1995. High frequency somatic embryogenesis in peanut (Arachis hypogaea L.) using mature, dry seed. Plant Cell Rep.15:38-42.
He, Y., H. Y. Wetzstein and B.A. Palevitz. 1995. Effects of a triazole fungicide on pollen germination, tube growth and cytoskeleton distribution on Tradescantia virginiana. Sex. Plant Reprod. 8:210-216.
He, Y., and H. Y. Wetzstein. 1995. Fixation induces differential tip morphology and immunolocalization of the cytoskeleton in pollen tubes. Physiol. Plant. 93:757-763.
Burns, J. A. and H. Y. Wetzstein. 1995. Development and germination of pecan somatic embryos derived from liquid culture. In Vitro Cell. Dev. Biol. 31:72-78.
Baker, C. M. and H. Y. Wetzstein. 1995. Repetitive somatic embryogenesis in peanut cotyledon cultures by continual exposure to 2,4-D. Plant Cell, Tiss. Org. Cult. 40:249-254.