Department of Horticultural Science
Dr. Markhart teaches undergraduate and graduate courses in environmental physiology, plant propagation, and organic production. His research focuses on the acclimation and adaptation of plants to a hostile fluctuation environment, and organic production systems for northern climates. Current research projects involve the development of low-temperature-tolerant root systems designed to increase productivity under heavy mulch or cover crops; the use of high tunnels to extend the production system for organic production of fruits; and investigating the effect of water and temperature stress on the levels of anticancinogenic compounds in cabbage and water cress.
Dr. Markhart serves on the board of directors of the Minnesota Food Association and the Minnesota Horticulture Society. He is also an advisor to the Dream for Wild Health. In addition to a number of publications on water and temperature relations in plants, Dr. Markhart wrote several computer programs for teaching water relations, patented a new tissue extraction press, and developed a novel approach to measure soil matric potential.
An avid organic gardener, Dr. Markhart writes the Sustainable Gardener column for the Northern Gardener Magazine, is a member of the Plant Biological Sciences graduate faculty, a member of the Sustainable Agriculture Minor faculty, and an advisor to the Student Organic Farm.
Castonguay, Y. and A.H. Markhart, III. 1992. Leaf gas exchange in water-stressed common bean and tepary bean Crop Sci. 32:980-986.
Sanders, P.L. and A.H. Markhart, III. 1992. Root system control of leaf water status in water stressed Phaseolus vulgaris. J. Exp. Bot. 43:1563-1587.
Udomprasert, N. PL Li, DW Davis, AH Markhart, III 1995. Effect of root temperatures on leaf gas exchange and growth at high air temperature in Phaseolus acutifolius and Phaseolus vulgaris Crop Sci. 35:486-489.
Udomprasert, N. PL Li, DW Davis, AH Markhart, III 1995. Root cytokinin level in relation to heat tolerance of Phaseolus acutifolius and Phaseolus vulgaris. Crop Sci. 35:496-501.
Lin, T.Y. and A. H. Markhart, III 1996. Phaseolus acutifolius A. Gray is more heat tolerant than P. vulgaris L. in the absence of water stress. Crop Sci. 36:110- 114.
Kwon, S., P.L. Sanders, A.H. Markhart, III 1997. Water relations, fatty acid adjustments, and desaturase gene expression during chilling acclimation in canola. ISHS Proceedings, editors .F. Abou-Hadid and R.Jones. Acta Horticulturae 434:237-240.
Singer, S.M., W.A. El Tohamy, A.F. Abou Hadid, A. H. Markhart, III, P. H. Li, 1996. Chilling and water stress injury in bean (Phaseolus vulgaris L) seedlings is reduced by pretreatment with CaCl2, Mefluidide, KCl and Mg Cl2. Egypt J. Hort. 23:77-87.
Fennel, A. and A.H. Markhart, III 1998. Rapid acclimation of root hydraulic conductance to low temperatures. J. Exp Bot. 49:879-884.
Sanders, P.L. and A.H. Markhart, 2000. Root system functions during chilling temperatures: Injury and acclimation. Chapter for Book Crop Responses and Adaptation to Temperature Stress, editor A.S. Basra.
Erickson, A. and Markhart, A. 2001. Flower production, fruit set, and physiology of bell pepper during elevated temperature and vapor pressure deficit. J. Amer.Soc.Hort.Sci. 26(6): 697-702.
Erickson, AN, Markhart, AH. 2002 Flower developmental stage and organ sensitivity of bell pepper (Capsicum annuum L.) to elevated temperature. Plant-cell-environ. Vol. 25 (1) p. 123-130.
Lee, H. C., D. W. Chiou, W. H. Chen, A. H. Markhart, Y. H. Chen and T. Y. Lin. 2004. Dynamics of cell growth and endoreduplication during orchid flower development. Plant Sci. 166: 659-667.
Burkhouse, P and AH Markhart, III. 2005. Sweet corn transplants and vinegar in organic production. Greenbook 2005: 14-16. Published by the Minnesota Department of Agriculture.
Markhart III, A.H.2006 Organic Educational Opportunities at the University of Minnesota: The role of the student organic farm. Hort Technology 16(3):443-445.
Ashling, J., C. Tchida, A. Markhart, P. Porter. 2006 Origin of Cornercopia, the University of Minnesota Student Organic Farm. J of Hunger and Environmental Nutrition. (In Press)
Patent #: 110.0224.0101: Methods for Increasing One or More Glucosinolates in a Plant with Gary Gardner, Jerry Cohen, Gerard, and Lynette Wong
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