I am a broadly trained plant physiologist/cell biologist having worked with algal nitrogen metabolism, herbicide mode of action and acquired herbicide resistance, and developmental biology and physiology of parasitic plants.
My current research involves the cell biology and physiology in marine systems, especially of freshwater and marine plants and algae. These organisms are the source of most carbon and nitrogen that is added to food chains in the coastal and freshwater areas. Macroalgae and higher plant representatives of these groups have the additional role of serving as sanctuary for the young of many animal species that share their habitat. In spite of their importance in these ecosystems, there are many gaps in our knowledge regarding their physiology and interaction between these and other organisms in these environments.
I am particularly interested in:
- molecular interaction between seagrasses and pathogens that have led to massive die-off of seagrass beds in temperate areas around the world,
- molecular mechanisms of stress tolerance in halophytic algae
- nitrogen and carbon uptake and metabolism in marine algae and the plant species forming the large off-shore seagrass beds that line the coastal regions of the Gulf of Mexico, and difference between non-indigenous species (NIS) and the native species
- cellular events involved in interactions between parasitic plants and their plant hosts
The seagrass pathogen, Labyrinthula, isolated from Zostera marina
(* indicate undergraduate authors)
J. D. Husband, R. P. Kiene, T. D. Sherman (2012) Oxidation of dimethylsulfoniopropionate (DMSP) in response to oxidative stress in Spartina alterniflora and protection of a non-DMSP producing grass by exogenous DMSP + acrylate. Environmental and Experimental Botany 79: 44–48
D. J. Shafer, J. E. Kaldy, T. D. Sherman, K. M. Marko (2011) Effects of Salinity on Photosynthesis and Respiration of the Seagrass Zostera Japonica: A Comparison of Two Established Populations in North America. Aquatic Botany 95: 214-220
N. Garcias-Bonet, T. D. Sherman, C. M. Duarte, N. Marbà (2011) The pathogenic marine protist Labyrinthula sp. in Western Mediterranean seagrass (Posidonia oceanica) meadows: distribution and pathogenicity. Estuaries and Coasts 34(6): 1161–1168
D. J. Shafer, S. Wyllie-Echeverria, and T. D. Sherman (2008) The Potential Role of Climate in the Distribution and Growth of the Introduced Seagrass Zostera japonica in North America. Aquatic Botany 89: 297-302
T. D. Sherman, A. J. Bowling, T. W. Barger and K. C. Vaughn (2008) The Vestigial Root of Dodder (Cuscuta pentagona) Seedlings. Int. J. Plant Sci. 169(8):998–1012.
T. D. Sherman, E. Boone, A. B. Morris, A. Woodard*, E. Goldman*, D. L. Martin, C. Gautier*, and J. J. O’Brien (2008) Investigations of internal interactions between the parasitic barnacle Loxothylacus texanus (Rhizocephala: Sacculinidae) and its host Callinectes sapidus (Brachyura: Portunidae) using PCR techniques. J. Crustacean Biology 28(2): 220-227
D. J. Shafer, T. D. Sherman, and S. Wyllie-Echeverria, (2007) Do Desiccation Tolerances Control the Vertical Distribution of Intertidal Seagrasses? Aquatic Botany 87(2): 161-166
J.B. James, T. D. Sherman, and R. Devereux (2006) "Analysis of bacterial communities in seagrass bed sediments by double-gradient denaturing gradient gel electrophoresis of PCR amplified 16S rRNA genes." Microbial Ecology 52(4): 655-661
J. Lartigue and T. D. Sherman (2006) A Field Study of Nitrogen Storage and Nitrate Reductase Activity b in the Estuarine Macroalgae Enteromorpha lingulata (Chlorophyceae) and Gelidium pusillum (Rhodophyceae) Estuaries and Coasts 29(4): 699–708
N. Ueda*, C. Partridge, J. Bolland*, J. Hemming,
T. Sherman, and A. Boettcher (2005) Effects of environmental
estrogens on male gulf pipefish, Syngnathus scovelli (Evermann
and Kendall). Bulletin of Environmental Contamination
J. Lartigue and T. D. Sherman (2005) Response
of Enteromorpha sp. (Chlorophyceae) to a nitrate
pulse: nitrate uptake, inorganic nitrogen storage,
and nitrate reductase activity. Marine Ecology
Progress Series 292: 147–157
E. J. Boone, A. A. Boettcher, T.
D. Sherman, and
J. J. O’Brien (2004) What constrains the
geographic and host range of the rhizocephalan Loxothylacus
texanus in the wild? Journal of
Experimental Marine Biology and Ecology: 309:
J.F. Valentine, E.F. Blythe, S. Madhavan, T.D.
Sherman (2004) Effects of simulated herbivory on
nitrogen enzyme levels, N-assimilation and N-allocation
in Thalassia testudinum. Aquatic Botany: 79:
E.J. Boone, A.B. Boettcher, T.D.
Sherman and J.J.
O’Brien (2003) Characterization of settlement
cues used by the Rhizocephalan barnacle, Loxothylacus
texanus. Marine Ecology Progress Series,
J. Lartigue and T. D. Sherman (2002) Field assays
for measuring nitrate reductase activity in Enteromorpha
sp. (Chlorophyceae), Ulva sp. (Chlorophyceae),
and Gelidium sp. (Rhodophyceae), Journal
Phycology, 38 (5): 971-982
H. Glenner J. Høeg, J. J. O'Brien and T.D.
Sherman (2000) The invasive
vermigon stage in the parasitic barnacles Loxothylacus
texanus and L. panopaei (Sacculinidae):
closing of the rhizocephalan life cycle. Marine
Biology. 136: 249-257
T. D. Sherman
, W. T. Pettigrew, and K.C. Vaughn (1999) Structural
and immunological characterization of the Cuscuta
L. chloroplast. Plant Cell Physiology
CURRENT AND PENDING FUNDING
- EPA - Alabama Center for Estuarine Studies (2007-2009) “Interactions between Native and Non-native Plants in the Mobile-Tensaw Delta” [Funded]