Faculty
James Baldwin
Chair, Professor and Nematologist
Cooperating Faculty Member
Location: 1447 Boyce Hall
Tel: (951) 827-5819
Fax: (951) 827-4431
E-mail: james.baldwin@ucr.edu
Research areas:
Our approach to systematics is testing hypotheses of nematode evolution in part through comparative reconstruction and developmental biology of character rich-nematode structures. Often studies are designed to address questions of character homology and to detect and understand parallel and convergent evolution of morphological traits. Primary tools include DIC light microscopy, video imaging, transmission, TEM tomography, scanning, confocal, and 4D microscopy. Through collaboration with molecular biologists we use molecular-based phylogenetic trees to map the evolution of independent morphological/developmental characters. Our reconstruction of feeding structures in Rhabditida and outgroups Cephalobina and Diplogastrina is being used to test classical hypotheses of evolution and is being expanded to test hypotheses of evolution of the stylet and plant parasitism in Tylenchida. We are also extending studies of feeding structures to groups believed to be basal to Secernentea. An important aspect of our phylogenetic studies is survey and description of new taxa. In this regard, we have ongoing surveys of the southwestern deserts of the USA. Currently we are conducting a survey of marine nematodes of Mexico’s Gulf of California in conjunction with Mexican collaborators. Our surveys and phylogenetic research is dependent on exchanges with scientists worldwide and with material we curate at the UCRNC taxonomic museum. screens looking for active transposable elements in insects and humans and have a leadership role in the Culex genome project.
Degrees
MS and PhD
North Carolina State University, Raleigh, N. C.
Awards
Fellow, Society of Nematologists
Fellow, American Association for the Advancement of Science
Publications
Bumbarger, D. J., J. Crum, M. H. Ellisman, and James G. Baldwin, 2007. Three-dimensional fine structural reconstruction of the nose sensory structures of Acrobeles complexus compared to Caenorhabdtis elegans (Nematoda: Rhabditida). J. Morphology 268: 649-663.
Subbotin, Sergei. Dieter Sturhan, Nicola Vovlas, Pablo Castillo, James Tanyi Tamber; Maurice Moens, James G Baldwin 2006. Application of secondary structure model of rRNA for phylogeny: D2-D3 expansion segments of the LSU gene of plant-parasitic nematodes from the family Hoplolaimidae Filipjev, 1934. Molecular Phylogenetics and Evolution. 43:881-890.
Abebe, Eyualem, James G. Baldwin, Bryon Adams, Duane Hope, Scott Gardner, Robin Huettel, Peter Mullin, Tom Powers, Jyotsna Sharma, Weimin Ye, W. Kelley Thomas. 2006. A position paper on the electronic publication of nematode taxonomic manuscripts. Journal of Nematology 38:305-311.
Mundo_Ocampo, Pl J. D. Lambshad, N. Debenham, I. W. King, P. De Ley, J. G. Baldwin, I T. De Ley A Rocha-Olivares, D. Waumann, W. K. Thomas, 2007. biodiversity of littoral nematodes from two sites in the Gulf of California Hydrobiologia 586:179-189.
Vladimir N. Chizhov, Olga A. Chumakova, Sergei A. Subbotin and James G. Baldwin, 2006. Morphological and molecular characterization of foliar nematodes of the genus Aphelenchoides: A. fragariae and A. ritzemabosi (Nematoda: Aphelenchoididae) from the Main Botanical Garden of the Russian Academy of Sciences, Moscow. Russian Journal of Nematology. 14:179-184.
Holovachov, O, I. Tandingan De Ley, M. Mundo Ocampo, James G. Baldwin, A. Rocha Olivares, and P. De Ley, 2008. Nematodes from the Gulf of Califonrian, part 1: the genera Ceramonema Cobb, 1933, Pselionema Cobb, 1933 and Pterygonema Gerlach, 1954. Nematology 10:347-373.
Mundo-Ocampo, Manuel, A. Trocolli, S. A. Subbotin, J. Del Cid, J. G. Baldwin and R. N. Inserra, 2008. Synonomy of Afenestrata with Heterodera supported by phylogenetics with molecular and morphological characterization of H. koreana comb. n. and H. orientalis comb. n. (Tylenchida: Heteroderidae. Nematology in press.
Ragsdale, E. J. J. Crum, M. Ellisman, J. G. Baldwin, in revision. Phylogenetic implications of three dimensional reconstruction of the stomatostylet and anterior epidermis in Aphenchus avenae. J. Morphology.
Subbotin, S. A. E. J. Ragsdale, T. Mullens, P. A. Roberts, M. Mundo-Ocampo, J. G. Baldwin in revision. A phylogenetic framework for root-lesion nematodes of the genus Pratylenchus (Nematoda): evidence from 18S and D2-D3 expansion segments of 28S ribosomal RNA genes and morphological characters. Mol. Phy. and Evol.
Bumbarger, D. J. S. Wijeratner, Cale Carter, J. Crum, M. H. Ellisman, J. G. Baldwin, submitted Three dimensional reconstructionof the amphid sensilla in