Robert J. Joly Professor Ph.D. Area of Interest: Plant Physiology E-mail: CV

Teaching Responsibilities

• HORT 201, Plant Propagation
• HORT 301, Plant Physiology

Current Research Interests

The objective of the research program is to elucidate the physiological and biophysical mechanisms by which plants adapt to water shortage and saline stress. The principal focus is on whole-plant processes that enhance or maintain water uptake by roots, increase the plant's capacity to retain water in a desiccating environment, or maintain a positive carbon balance during prolonged drought stress. Current projects include: (1) molecular and biophysical analyses of water transport across root membranes, including a study of aquaporin gene expression in roots and leaves of Arabidopsis thaliana subjected to osmotic stress, and (2) evaluation of the role of the ascorbic acid cycle in mediating signal transduction leading to stress-induced stomatal closure.

Selected Publications

 

• Mickelbart, M.V., G. Peel, R.J. Joly, D. Rhodes, G. Ejeta and P.B. Goldsbrough. 2003. Development and characterization of near-isogenic lines of sorghum segregating for glycinebetaine accumulation. Physiologia Plantarum 118: 253-261.
• Karlson, D.T., Y. Zeng, V.E. Stirm, R.J. Joly and E.N. Ashworth. 2003. Photoperiodic regulation of a 24 kD dehydrin-like protein in red-osier dogwood (Cornus sericea L.) with relation to freeze-tolerance. Plant and Cell Physiology 44: 25-34.
• Maggio, A., S. Miyazaki, P. Veronese, T. Fujita, J.I. Ibeas, B. Damsz, M.L. Narasimham, P.M. Hasegawa, R.J. Joly, and R.A. Bressan. 2002. Does proline accumulation play an active role in stress-induced growth reduction? The Plant Journal 31:699-712.
• Maggio, A., M.G. McCully, K. Kerdnaimongkol, R.A. Bressan, P.M. Hasegawa, and R.J. Joly. 2002. The ascorbic acid cycle mediates signal transduction leading to stress-induced stomatal closure. Functional Plant Biology 29:845-852.
• Maggio, A., R.J. Joly, P.M. Hasegawa and R.A. Bressan. 2002. Can the quest for drought tolerant crops avoid Arabidopsis any longer? In: Crop Production In Saline Environments (S.S. Goyal, S.K. Sharma, D.W. Rains, eds.). Hawarth Press, New York, pp. 99-129.
• Maggio, A., P.M. Hasegawa, R.A. Bressan, M.F. Consiglio and R.J. Joly. 2001. Unraveling the functional relationship between root anatomy and stress tolerance. Australian Journal of Plant Physiology 28:999-1004.
• Frantz, J.M., R.J. Joly and C.A. Mitchell. 2001. Intracanopy lighting reduces electrical energy utilization by closed cowpea stands. Life Support and Biosphere Science 7: 283-290.
• Maggio, A. and R.J. Joly. 2000. Regulation of water channel activity and stomatal conductance are coordinated events in honey locust (Gleditsia triacanthos): a proposed role for aquaporins. In: Molecular Biology and Physiology of Water and Solute Transport (S. Hohmann, J. Frokiaer, S. Nielsen, J. Rydstrom. eds.). Kluwer Academic/Plenum Publishers. pp 309-317.
• Frantz, J.M., R.J. Joly and C.A. Mitchell. Intracanopy lighting influences radiation capture, productivity, and leaf senescence in cowpea canopies. 2000. Journal of the American Society for Horticultural Science 125: 694-701.
• Maggio, A., M.P. Reddy and R.J. Joly. 2000. Leaf gas exchange and solute accumulation in the halophyte Salvadora persica grown at moderate salinity. Environmental and Experimental Botany 44: 31-38.
• Joly, R.J. and W.R. Woodson. 2000. It's all about learning: an inquiry-based approach to teaching plant physiology. HortTechnology 10: 277-279.
• Joly, R.J., M.L. Jones, S. Verlinden, D. Rhodes and W.R. Woodson. 2000. Learning in an inquiry-driven plant physiology laboratory. Journal of Natural Resources and Life Sciences Education 29: 31-35.
• Kaufmann, P.H., R.J. Joly and P.A. Hammer. 2000. The influence of day and night temperature differentials on root elongation rate, root hydraulic properties, and shoot water relations in Chrysanthemum. Journal of the American Society for Horticultural Science 125: 383-389.
• Biddinger, E.J., C.M. Liu, R.J. Joly and K.G. Raghothama. 1998. Physiological and molecular responses of aeroponically grown tomato plants to phosphorus deficiency. Journal of the American Society for Horticultural Science 123: 330-333.
• Frantz, J.M. C. Chun, R.J. Joly and C.A. Mitchell. 1998. Intracanopy lighting of cowpea canopies in controlled environments. Life Support and Biosphere Science 5: 183-189.
• Kerdnaimongkol, K. A. Bhatia, R.J. Joly and W.R. Woodson. 1997. Oxidative stress and diurnal variation in chilling sensitivity of tomato seedlings. Journal of the American Society for Horticultural Science 122: 485-490.
• Lagrimini, L.M., R.J. Joly, J.R. Dunlap and T.-T.Y. Liu. 1997. The consequence of peroxidase overexpression in transgenic plants on root growth and development. Plant Molecular Biology 33: 887-895.
• Yang, G., D. Rhodes and R.J. Joly. 1996. Effects of high temperature on membrane stability and chlorophyll fluorescence in glycinebetaine-containing and glycinebetaine-deficient maize lines. Australian Journal of Plant Physiology 23: 437-443.
• Wood, A.J., H. Saneoka, D. Rhodes, R.J. Joly and P.B. Goldsbrough. 1996. Betaine aldehyde dehydrogenase in sorghum: molecular cloning and expression of two related genes. 1996. Plant Physiology 110: 1301-1308.
• Premachandra, G.S., D.T. Hahn, D. Rhodes and R.J. Joly. 1995. Leaf water relations and solute accumulation in two grain sorghum lines exhibiting contrasting drought tolerance. 1995. Journal of Experimental Botany 46: 1833-1841.
• Maggio, A. and R.J. Joly. 1995. Effects of mercuric chloride on the hydraulic conductivity of tomato root systems: evidence for a channel-mediated water pathway. Plant Physiology 109: 331-335.
• Saneoka, H., C. Nagasaka, D.T. Hahn, W.-J. Yang, G.S. Premachandra, R.J. Joly and D. Rhodes. 1995. Salt tolerance of glycinebetaine-deficient and -containing maize lines. Plant Physiology 107: 631-638.
• Yang, W.-J., A. Nadolska-Orczyk, K.V. Wood, D.T. Hahn, P.J. Rich, A.J. Wood, H. Saneoka, G.S. Premachandra, C.C. Bonham, J.C. Rhodes, R.J. Joly, Y. Samaras, P.B. Goldsbrough and D. Rhodes. 1995. Near-isogenic lines of maize differing for glycinebetaine. Plant Physiology 107: 621-630.
• Jenks, M.A., R.J. Joly, P.J. Peters, P.J. Rich, J.D. Axtell and E.N. Ashworth. 1994. Chemically-induced cuticle mutation affecting epidermal conductance to water vapor and disease susceptibility in Sorghum bicolor (L.) Moench. Plant Physiology 105: 1239-1245.
• Premachandra, G.S., D.T. Hahn, J.D. Axtell and R.J. Joly. 1994. Leaf water relations, gas exchange and water-use efficiency in bloomless and sparse-bloom mutants of Sorghum bicolor L. Environmental and Experimental Botany 34: 293-301.
• Premachandra, G.S., D.T. Hahn and R.J. Joly. 1994. Leaf water relations and gas exchange in two grain sorghum lines differing in their pre- and post-flowering drought tolerance. Journal of Plant Physiology 143: 96-101.
• Premachandra, G.S., D.T. Hahn and R.J. Joly. 1993. A simple method for determination of abaxial and adaxial epicuticular wax loads in intact leaves of Sorghum bicolor. Canadian Journal of Plant Science 73: 521-524.
• Struve, D.K. and R.J. Joly. 1992. Transplanted red oak seedlings mediate transplant shock by reducing leaf surface area and altering dry weight partitioning. Canadian Journal of Forest Research 22: 1441-1448.
• Premachandra, G.S. and R.J. Joly. 1992. Solutes contributing to osmotic pressure in young versus mature leaves of cacao seedlings. Journal of Plant Physiology 139: 355-360.
• Simon, J.E., D. Reiss-Bubenheim, R.J. Joly, and D.J. Charles. 1992. Water stress-induced alterations in essential oil content and composition of sweet basil. Journal of Essential Oil Research 4: 71-75.
• Graves, W.R., R.J. Joly, and M.N. Dana. 1991. Water use and growth of honey locust and tree-of-heaven at high root-zone temperature. HortScience 26: 1309-1312.
• Joly, R.J. and D.T. Hahn. 1991. Net CO2 assimilation of cacao seedlings following dark chilling. Tree Physiology 9: 415-424.
• Charles, D., R.J. Joly, and J.E. Simon. 1990. Effects of osmotic stress on the essential oil content and composition of peppermint. Phytochemistry 29: 2837-2840.
• Deng, X, R.J. Joly, and D.T. Hahn. 1990. The influence of plant water deficit on distribution of 14C-labeled assimilates in cacao seedlings. Annals of Botany 66: 211-217.
• Deng, X, R.J. Joly, and D.T. Hahn. 1990. The influence of plant water deficit on photosynthesis and translocation of 14C-labeled assimilates in cacao seedlings. Physiologia Plantarum 78: 623-627.
• Joly, R.J. 1989. Effects of sodium chloride on the hydraulic conductivity of soybean root systems. Plant Physiology 91: 1262-1265.
• Deng, X, R.J. Joly, and D.T. Hahn. 1989. Effects of plant water deficit on the daily carbon balance of leaves of cacao seedlings. Physiologia Plantarum 77: 407-412.
• Joly, R.J., W.T. Adams, and S.G. Stafford. 1989. Phenological and morphological responses of mesic and dry site sources of coastal Douglas-fir to water deficit. Forest Science 35: 987-1005.
• Graves, W.R., M.N. Dana, and R.J. Joly. 1989. Influence of root-zone temperature on growth of tree-of-heaven. Journal of Environmental Horticulture 7: 79-82.
• Graves, W.R., M.N. Dana and R.J. Joly. 1989. Root-zone temperature affects water status and growth of red maple. Journal of the American Society for Horticultural Science 114: 406-410.
• Joly, R.J. and D.T. Hahn. 1989. An empirical model for leaf flush expansion in cacao in relation to plant water deficit. Annals of Botany 64: 1-8.
• Joly, R.J. and D.T. Hahn. 1989. Net CO2 assimilation of cacao seedlings during periods of plant water deficit. Photosynthesis Research 21: 151-159.
• Joly, R.J. and J.B. Zaerr. 1987. Alteration of cell-wall water content and elasticity in Douglas-fir during periods of water deficit. Plant Physiology 83: 418-422.
• Joly, R.J. and W.T. Adams. 1983. Allozyme analysis of pitch X loblolly pine hybrids produced by supplemental mass-pollination. Forest Science 29: 423-432.
• Eckert, R.T., R.J. Joly, and D.B. Neale. 1981. Genetics of isoenzyme variants and linkage relationships among allozyme loci in 35 eastern white pine clones. Canadian Journal of Forest Research 11: 573-579.
• Adams, W.T. and R.J. Joly. 1980. Allozyme studies in loblolly pine seed orchards: clonal variation and frequency of progeny due to self-fertilization. Silvae Genetica 29: 1-4.
• Adams, W.T. and R.J. Joly. 1980. Linkage relationships among twelve allozyme loci in loblolly pine. Journal of Heredity 71: 199-202.
• Adams, W.T. and R.J. Joly. 1980. Genetics of allozyme variants in loblolly pine. Journal of Heredity 71: 33-40.