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.