Timothy McNellis

Associate Professor of Plant Pathology & Environmental Microbiology

318 Buckhout Lab
University Park, PA
twm4@psu.edu
814-863-7646

Research Summary

Genetics, molecular biology and physiology of plant interactions with phytopathogenic bacteria. Signal transduction events involved in plant disease resistance. Genetic control of plant hypersensitive cell death.

Huck Graduate Students

Jeremy Held

Huck Affiliations

Plant Biology

One Health Microbiome Center

Plant Institute

Most Recent Publications

Synthesis of aspartic acid and tyrosine by the fire blight pathogen Erwinia amylovora is not required for proliferation on apple flower stigmas or virulence in fruitlets

Neil P. Schultes, Judith Pawloski Sinn, Eric S. Swenson, Timothy W. McNellis, 2024, Journal of Applied Microbiology Symposium Supplement

Arabidopsis Wall-Associated Kinase 3 is required for harpin-activated immune responses

Jeremy B. Held, Taran Rowles, William Schulz, Timothy W. McNellis, 2024, New Phytologist on p. 853-857

Glyceraldehyde-3-phosphate dehydrogenase is required for fire blight disease establishment in apple fruitlets

Neil P. Schultes, Judith P. Sinn, Timothy W. McNellis, 2023, Physiological and Molecular Plant Pathology

The Antiterminator: How Erwinia amylovora avoids premature transcription termination of long operons to maintain virulence

Timothy McNellis, 2022, Phytopathology on p. 1

Putative transcription antiterminator RfaH contributes to Erwinia amylovora virulence

Sara Klee, Judith P. Sinn, Jeremy Held, Chad Vosburg, J Vosburg, Aleah Holmes, Brian Lehman, K Peter, Timothy McNellis, 2022, Molecular Plant Pathology on p. 9

Flowering locus T chimeric protein induces floral precocity in edible citrus.

Judith Sinn, Jeremy Held, Chad Vosburg, Vladimir Orbovic, Earl Taylor, Tim Gottwald, Ed Stover, Gloria Moore, Timothy McNellis, 2021, Plant Biotechnology Journal on p. 3

Virulence genetics of an erwinia amylovora putative polysaccharide transporter family member

Sara Klee, Judith P. Sinn, Elena Christian, Aleah Holmes, Kaixi Zhao, Brian Lehman, Kari A. Peter, Cristina Rosa, Timothy McNellis, 2020, Journal of Bacteriology on p. 19

Flowering Locus T chimeric protein induces floral precocity in edible citrus

Judith P. Sinn, Jeremy B. Held, Chad Vosburg, Sara M. Klee, Vladimir Orbovic, Earl L. Taylor, Tim R. Gottwald, Ed Stover, Gloria A. Moore, Timothy W. McNellis, 2020, Plant Biotechnology Journal

Extragenic suppression of elongation factor P gene mutant phenotypes in erwinia amylovora

Sara Klee, Judith P. Sinn, Aleah Holmes, Brian Lehman, Teresa Krawczyk, Teresa Kraczyk, Kari A. Peter, Timothy W. McNellis, 2019, Journal of Bacteriology on p. 11

Erwinia amylovora auxotrophic mutant exometabolomics and virulence on apples

Sara Klee, Klee Sara, Judith Sinn, Melissa Finley, Erik Allman, Philip B. Smith, Osaretin Aimufua, Viji Sitther, Brian Lehman, Teresa Kraczyk, Teresa Krawczyk, Kari A. Peter, Timothy McNellis, 2019, Applied and Environmental Microbiology on p. 19

Most-Cited Papers

Identification of apple miRNAs and their potential role in fire blight resistance

Elżbieta Kaja, Michał W. Szcześniak, Philip J. Jensen, Michael J. Axtell, Timothy McNellis, Izabela Makałowska, 2015, Tree Genetics and Genomes

Flowering Locus T chimeric protein induces floral precocity in edible citrus

Judith P. Sinn, Jeremy B. Held, Chad Vosburg, Sara M. Klee, Vladimir Orbovic, Earl L. Taylor, Tim R. Gottwald, Ed Stover, Gloria A. Moore, Timothy W. McNellis, 2020, Plant Biotechnology Journal

Erwinia amylovora auxotrophic mutant exometabolomics and virulence on apples

An Erwinia amylovora yjeK mutant exhibits reduced virulence, increased chemical sensitivity and numerous environmentally dependent proteomic alterations

Sara M. Klee, Islam Mostafa, Sixue Chen, Craig Dufresne, brian L. Lehman, Judith P. Sinn, Kari A. Peter, Timothy W. McNellis, 2018, Molecular Plant Pathology on p. 1667-1678

The apple fruitlet model system for fire blight disease

Sara Klee, Judith Sinn, Timothy McNellis, 2019, on p. 187-198

Erwinia amylovora pyrC mutant causes fire blight despite pyrimidine auxotrophy

L. S. Ramos, J. P. Sinn, B. L. Lehman, E. E. Pfeufer, K. A. Peter, T. W. McNellis, 2015, Letters in Applied Microbiology on p. 572-579