Christopher Warren Schadt


Christopher Warren Schadt

Senior Staff Scientist


Christopher W. Schadt is a Senior Staff Scientist in the Biosciences Division at Oak Ridge National Laboratory. Dr. Schadt is an environmental microbiologist with expertise in the influence of microorganisms (bacteria, fungi and archaea) on biogeochemical cycles in soils and sediments, as well as their interactions with plant community members. Additionally he has interest and expertise in development of molecular methodologies to track the distribution of activities of microorganisms in these environments. He received his Ph.D in 2002 under the direction of Prof. Steven Schmidt at the University of Colorado, Boulder; proceeding to a postdoctoral appointment and subsequent staff appointments at ORNL. Dr. Schadt also is a Joint Associate Professor at the University of Tennessee in the Department of Microbiology. He an author of over 90 peer reviewed journal articles and book chapters


SPRUCE Project (

Plant Microbe Interfaces Project (

Labgroup Webpage - (


RECENT PUBLICATIONS (Full list on Google Scholar)

Bible AN, SJ Fletcher, DA Pelletier, CW Schadt, SS Jawdy, DJ Weston, LN Engle, T Tschaplinski, R Masyuko, S Polisetti, PW Bohn, TA Coutinho, MJ Doktycz and JL Morrell-Falvey. (2016). A Carotenoid-Deficient Mutant in Pantoea sp. YR343, a Bacteria Isolated from the Rhizosphere of Populus deltoides, is Defective in Root Colonization. Frontiers in Microbiology 7:491

Bonito G, K Hameed, R Ventura, J Krishnan, CW Schadt, and R Vilgalys, (2016). Isolating a functionally relevant guild of fungi from the root microbiome of Populus. Fungal Ecology22:35-42.

Bonito G, K Hameed, R Healy, M Toome, C Reid, HL Liao, CW Schadt and R Vilgalys. (2016) Atractiella rhizophila, an endorrhizal fungus isolated from the Populus root microbiome. Mycologia, In Press.

Deng, Y,  Z He, J Xiong, H Yu, M Xu, SE Hobbie, PB Reich, CW Schadt, A Kent, E Pendall, M Wallenstein, Z He, and J Zhou. (2016) Elevated carbon dioxide accelerates the spatial turnover of soil microbial communities. Global Change Biology, 22(2):957-964.

Deng Y, P Zhang, Y Qin, Q Tu, Y Yang, Z He, C Schadt and J Zhou. (2016) Network succession reveals the importance of competition in response to emulsified vegetable oil amendment for uranium bioremediation. Environmental Microbiology 18(1):205-218

Hacquard S and CW Schadt* (2015). Towards a holistic understanding of the beneficial interactions across the Populus microbiome. New Phytologist205(4): 1424-1430. [*equal contribution]

Higgins SA, A Welsh, LH Orellana, KT Konstantinidis, JC Chee-Sanford, RA Sanford, CW Schadt, and FE Löffler. (2016) Detection and Diversity of Fungal Nitric Oxide Reductase Genes (p450nor) in Agricultural Soils. Applied and Environmental Microbiology82(10), pp.2919-2928.

Klingeman DM, S Utturkar, TYS Lu, CW Schadt, DA Pelletier and SD Brown 2015. Draft Genome Sequences of Four Streptomyces Isolates from the Populus trichocarpa Root Endosphere and Rhizosphere. Genome Announcements3(6): e01344-15.

Jun, SR, MS Robeson, LJ Hauser, CW Schadt and AA Gorin. (2015). PanFP: Pangenome-based functional profiles for microbial communities. BMC Research Notes. 8: 479.

Jun, SR., TM Wassenaar, I Nookaew, L Hauser, V Wanchai, M Land, CM Timm, TYS Lu, CW Schadt, MJ Doktycz and DA Pelletier. (2016) Diversity of Pseudomonas Genomes, Including Populus-Associated Isolates, as Revealed by Comparative Genome Analysis. Applied and Environmental Microbiology82(1): 375-383.

Naujokas, MF, NT Basta, Z Cheng, GM Hettiarachchi, M Maddaloni, CW Schadt, KG Scheckel, C Attanayake and H Henry. (2015). Bioavailability-based In Situ Remediation to Meet Future Lead (Pb) Standards in Urban Soils and Gardens. Environmental Science & Technology. 49(15):8948–8958.

Schadt, CW and A Rosling. (2015). Comment on “Global diversity and geography of soil fungi”. Science348(6242):1438.

Timm, C.M., Campbell, A.G., Utturkar, S.M., Jun, S.R., Parales, R.E., Tan, W.A., Robeson, M.S., Lu, T.Y.S., Jawdy, S., Brown, S.D. and Ussery, D.W., Schadt, C.W. (2015). Metabolic functions of Pseudomonas fluorescens strains from Populus deltoides depend on rhizosphere or endosphere isolation compartment. Frontiers in Microbiology6: 1118

Uehling J, A Gryganskyi, K Hameed, T Tschaplinski, PK Misztal, S Wu, A Desirò, N Vande Pol, Z Du, A Zienkiewicz, K Zienkiewicz, E Morin, E Tisserant, R Splivallo, M Hainaut, B Henrissat, R Ohm, A Kuo, J Yan, A Lipzen, M Nolan, K LaButti, K Barry, AH Goldstein, J Labbé, C Schadt, G Tuskan, I Grigoriev, F Martin, R Vilgalys and G Bonito. Comparative genomics of Mortierella elongata and its bacterial endosymbiont Mycoavidus cysteinexigens. Environmental Microbiology, In Press.

Utturkar SM, WN Cude, MS Robeson, ZK Yang, DM Klingeman, ML Land, SL Allman, TYS Lu, SD Brown, CW Schadt. M Podar and DA Pelletier. (2016) Enrichment of root endophytic bacteria from Populus deltoides and single-cell genomics analysis. Applied and Environmental Microbiology, 82(18): 5698-5708.

Wilson RM, AM Hopple, MM Tfaily, SD Sebestyen, CW Schadt, L Pfeifer-Meister, C Medvedeff, KJ McFarlane, JE Kostka, M Kolton, R Kolka, LA Kluber, JK Keller, TP Guilderson, NA Griffiths, JP Chanton, SD Bridgham, and PJ Hanson. (2016) Stability of Peatland Carbon to Rising Temperatures. Nature Communications, 7: 13723.

Velez J, TJ Tschaplinski, R Vilgalys, CW Schadt, G Bonito, K Hameed, N Engle and CE Hamilton. (2016) Characterization of a novel, ubiquitous fungal endophyte from the rhizosphere and root endosphere of Populus trees. Fungal Ecology, In Press.

Wang, G, S Jagadamma, MA Mayes, CW Schadt, JM Steinweg, L Gu and WM Post. (2015). Microbial dormancy improves development and experimental validation of ecosystem model. ISME Journal. 9: 226-237.

Zhang, P, WM Wu, JD Van Nostrand, Y Deng, Z He, T Gihring, G Zhang, CW Schadt, D Watson, P Jardine, CS Criddle, S Brooks, TL Marsh, JM Tiedje, AP Arkin and J Zhou. (2015). Dynamic succession of groundwater functional microbial communities in response to emulsified vegetable oil amendment during sustained in situ U (VI) reduction. Applied and Environmental Microbiology. 81(12): 4164-4172.   


Pelletier DA, DJ Weston, CW Schadt, MJ Doktycz and GA Tuskan. (2013) Plant Growth Promoting Rhizobacterium. Filed January 2013 (No. 13/747,995), Granted August 2015 (No. US9101144 B2)