David Geiser

Professor of Mycology

121 Buckhout Lab
University Park, PA
dmg17@psu.edu
814-865-9773

Research Summary

Molecular evolutionary genetics of pathogenic and toxigenic fungi.

Huck Affiliations

Bioinformatics and Genomics

Molecular, Cellular, and Integrative Biosciences

One Health Microbiome Center

Plant Institute

Ecology Institute

Center for Chemical Ecology

Most Recent Publications

Phylogenomics reveals extensive misidentification of fungal strains from the genus Aspergillus

Jacob L. Steenwyk, Charu Balamurugan, Huzefa A. Raja, Carla Gonçalves, Ningxiao Li, Frank Martin, Judith Berman, Nicholas H. Oberlies, John G. Gibbons, Gustavo H. Goldman, David M. Geiser, Jos Houbraken, David S. Hibbett, Antonis Rokas, 2024, Microbiology spectrum

Diversity of Arthropods that Visit Xyris spp. (Xyridaceae): New Observations from Guyana

Terry J. Torres-Cruz, Lauren A. Ré, Jack R. Johnson, David M. Geiser, Michael J. Skvarla, 2024, Proceedings of the Entomological Society of Washington on p. 246-255

Knowledge gaps, research needs and opportunities in plant disease diagonostic assay development and validation.

David Geiser, Frank Martin, Andres Espíndola, Andres Espinola, Judith Brown, T Bell, Y Yang, Seogchan Kang, 2023, Phytofrontiers on p. 51-63

DNA Sequence-Based Identification of Fusarium: A Work in Progress

Kerry O’Donnell, Briana K. Whitaker, Imane Laraba, Robert H. Proctor, Daren W. Brown, Kirk Broders, Hye Seon Kim, Susan P. McCormick, Mark Busman, Takayuki Aoki, Terry J. Torres-Cruz, David M. Geiser, 2022, Plant Disease on p. 1597-1609

Phylogenetic Diversity and Mycotoxin Potential of Emergent Phytopathogens Within the Fusarium tricinctum Species Complex

I Laraba, M Busman, David Geiser, K O'Donnell, 2022, Phytopathology on p. 1284-1298

FUSARIUM-ID v.3.0: An Updated, Downloadable Resource for Fusarium Species Identification

T Torres-Cruz, B Whitaker, R Proctor, K Broders, I Laraba, H Kim, D Brown, Kerry O’Donnell, K O'Donnell, T Estrada-Rodríguez, Y Lee, K Cheong, E Wallace, C McGee, S Kang, David Geiser, 2022, Plant Disease on p. 1610-1616

Pure Culture and DNA Sequence-Based Identification of Fusarium from Symptomatic Plants and Diverse Substrates

K O'Donnell, Kerry O’Donnell, I Laraba, David Geiser, 2022, Methods in molecular biology: Fusarium WIlt on p. 1-20

Fusarium abutilonis and F. guadeloupense, two novel species in the Fusarium buharicum clade supported by multilocus molecular phylogenetic analyses

Kerry O’Donnell, Tom Gräfenhan, Imane Laraba, Mark Busman, Robert H. Proctor, Hye Seon Kim, Nathan P. Wiederhold, David M. Geiser, Keith A. Seifert, 2022, Mycologia on p. 682-696

Author Correction: Fungal taxonomy and sequence-based nomenclature (Nature Microbiology, (2021), 6, 5, (540-548), 10.1038/s41564-021-00888-x)

Robert Lücking, M. Catherine Aime, Barbara Robbertse, Andrew N. Miller, Takayuki Aoki, Hiran A. Ariyawansa, Gianluigi Cardinali, Pedro W. Crous, Irina S. Druzhinina, David M. Geiser, David L. Hawksworth, Kevin D. Hyde, Laszlo Irinyi, Rajesh Jeewon, Peter R. Johnston, Paul M. Kirk, Elaine Malosso, Tom W. May, Wieland Meyer, Henrik R. Nilsson, Maarja Öpik, Vincent Robert, Marc Stadler, Marco Thines, Duong Vu, Andrey M. Yurkov, Ning Zhang, Conrad L. Schoch, 2021, Nature Microbiology on p. 971

Phylogenomic analysis of a 55.1-kb 19-gene dataset resolves a monophyletic fusarium that includes the fusarium solani species complex

David M. Geiser, Abdullah M.S. Al-Hatmi, Takayuki Aoki, Tsutomu Arie, Virgilio Balmas, Irene Barnes, Gary C. Bergstrom, Madan K. Bhattacharyya, Cheryl L. Blomquist, Robert L. Bowden, Balazs Brankovics, Daren W. Brown, Lester W. Burgess, Kathryn Bushley, Mark Busman, Jose F. Cano-Lira, Joseph D. Carrillo, Hao Xun Chang, Chi Yu Chen, Wanquan Chen, Martin Chilvers, Sofia Chulze, Jeffrey J. Coleman, Christina A. Cuomo, Z. Wilhelm de Beer, G. Sybren de Hoog, Johanna Del Castillo-Munera, Emerson M. Del Ponte, Javier Dieguez-Uribeondo, Antonio Di Pietro, Veronique Edel-Hermann, Wade H. Elmer, Lynn Epstein, Akif Eskalen, Maria Carmela Esposto, Kathryne L. Everts, Sylvia P. Fernandez-Pavıa, Gilvan Ferreira da Silva, Nora A. Foroud, Gerda Fourie, Rasmus J.N. Frandsen, Stanley Freeman, Michael Freitag, Omer Frenkel, Kevin K. Fuller, Tatiana Gagkaeva, Donald M. Gardiner, Anthony E. Glenn, Scott E. Gold, Thomas R. Gordon, Nancy F. Gregory, Marieka Gryzenhout, Josep Guarro, Beth K. Gugino, Santiago Gutierrez, Kim E. Hammond-Kosack, Linda J. Harris, Monika Homa, Cheng Fang Hong, Laszlo Hornok, Jenn Wen Huang, Macit Ilkit, Adriaana Jacobs, Karin Jacobs, Cong Jiang, Marıa del Mar Jimenez-Gasco, Seogchan Kang, Matthew T. Kasson, Kemal Kazan, John C. Kennell, Hye Seon Kim, H. Corby Kistler, Gretchen A. Kuldau, Tomasz Kulik, Oliver Kurzai, Imane Laraba, Matthew H. Laurence, Theresa Lee, Yin Won Lee, Yong Hwan Lee, John F. Leslie, Edward C.Y. Liew, Lily W. Lofton, Antonio F. Logrieco, Manuel S. Lopez-Berges, Alicia G. Luque, Erik Lysøe, Li Jun Ma, Robert E. Marra, Frank N. Martin, Sara R. May, Susan P. McCormick, Chyanna McGee, Jacques F. Meis, Quirico Migheli, N. M.I. Mohamed Nor, Michel Monod, Antonio Moretti, Diane Mostert, Giuseppina Mule, Françoise Munaut, Gary P. Munkvold, Paul Nicholson, Marcio Nucci, Kerry O’Donnell, Matias Pasquali, Ludwig H. Pfenning, Anna Prigitano, Robert H. Proctor, Stephane Ranque, Stephen A. Rehner, Martijn Rep, Gerardo Rodrıguez-Alvarado, Lindy Joy Rose, Mitchell G. Roth, Carmen Ruiz-Roldan, Amgad A. Saleh, Baharuddin Salleh, Hyunkyu Sang, Marıa Mercedes Scandiani, Jonathan Scauflaire, David G. Schmale, Dylan P.G. Short, Adnan Sisic, Jason A. Smith, Christopher W. Smyth, Hokyoung Son, Ellie Spahr, Jason E. Stajich, Emma Steenkamp, Christian Steinberg, Rajagopal Subramaniam, Haruhisa Suga, Brett A. Summerell, Antonella Susca, Cassandra L. Swett, Christopher Toomajian, Terry J. Torres-Cruz, Anna M. Tortorano, Martin Urban, Lisa J. Vaillancourt, Gary E. Vallad, Theo A.J. van der Lee, Dan Vanderpool, Anne D. van Diepeningen, Martha M. Vaughan, Eduard Venter, Marcele Vermeulen, Paul E. Verweij, Altus Viljoen, Cees Waalwijk, Emma C. Wallace, Grit Walther, Jie Wang, Todd J. Ward, Brian L. Wickes, Nathan P. Wiederhold, Michael J. Wingfield, Ana K.M. Wood, Jin Rong Xu, Xiao Bing Yang, Tapani Yli-Mattila, Sung Hwan Yun, Latiffah Zakaria, Hao Zhang, Ning Zhang, Sean X. Zhang, Xue Zhang, 2021, Phytopathology on p. 1064-1079

Most-Cited Papers

Unambiguous identification of fungi: Where do we stand and how accurate and precise is fungal DNA barcoding?

Robert Lücking, M. Catherine Aime, Barbara Robbertse, Andrew N. Miller, Hiran A. Ariyawansa, Takayuki Aoki, Gianluigi Cardinali, Pedro W. Crous, Irina S. Druzhinina, David M. Geiser, David L. Hawksworth, Kevin D. Hyde, Laszlo Irinyi, Rajesh Jeewon, Peter R. Johnston, Paul M. Kirk, Elaine Malosso, Tom W. May, Wieland Meyer, Maarja Öpik, Vincent Robert, Marc Stadler, Marco Thines, Duong Vu, Andrey M. Yurkov, Ning Zhang, Conrad L. Schoch, 2020, IMA Fungus

DNA sequence-based identification of Fusarium: Current status and future directions

Kerry O’Donnell, Todd J. Ward, Vincent A.R.G. Robert, Pedro W. Crous, David M. Geiser, Seogchan Kang, 2015, Phytoparasitica on p. 583-595

Systematics of key phytopathogenic Fusarium species: Current status and future challenges

Takayuki Aoki, Kerry O'Donnell, David M. Geiser, 2014, Journal of General Plant Pathology on p. 189-201

Sequence-based classification and identification of Fungi

David Hibbett, Kessy Abarenkov, Urmas Kõljalg, Maarja Öpik, Benli Chai, James Cole, Qiong Wang, Pedro Crous, Vincent Robert, Thorunn Helgason, Joshua R. Herr, Paul Kirk, Shiloh Lueschow, Kerry O’Donnell, R. Henrik Nilsson, Ryoko Oono, Conrad Schoch, Christopher Smyth, Donald M. Walker, Andrea Porras-Alfaro, John W. Taylor, David M. Geiser, 2016, Mycologia on p. 1049-1068

Phylogenomic analysis of a 55.1-kb 19-gene dataset resolves a monophyletic fusarium that includes the fusarium solani species complex

Fungal taxonomy and sequence-based nomenclature

Discordant phylogenies suggest repeated host shifts in the Fusarium-Euwallacea ambrosia beetle mutualism

Kerry O'Donnell, Stacy Sink, Ran Libeskind-Hadas, Jiri Hulcr, Matthew T. Kasson, Randy C. Ploetz, Joshua L. Konkol, Jill N. Ploetz, Daniel Carrillo, Alina Campbell, Rita E. Duncan, Pradeepa N.H. Liyanage, Akif Eskalen, Francis Na, David M. Geiser, Craig Bateman, Stanley Freeman, Zvi Mendel, Michal Sharon, Takayuki Aoki, Allard A. Cossé, Alejandro P. Rooney, 2015, Fungal Genetics and Biology on p. 277-290

Marasas et al. 1984 “Toxigenic Fusarium Species: Identity and Mycotoxicology” revisited

Kerry O’Donnell, Susan P. McCormick, Mark Busman, Robert H. Proctor, Todd J. Ward, Gail Doehring, David M. Geiser, Johanna F. Alberts, John P. Rheeder, 2018, Mycologia on p. 1058-1080

Epitypification of Fusisporium (Fusarium) solani and its assignment to a common phylogenetic species in the Fusarium solani species complex

Hans Josef Schroers, Gary J. Samuels, Ning Zhang, Dylan P.G. Short, Jean Juba, David M. Geiser, 2016, Mycologia on p. 806-819

DNA Sequence-Based Identification of Fusarium: A Work in Progress

News Articles Featuring David Geiser

Sep 12, 2023

Penn State professor elected to Mycological Society of America leadership

David Geiser was elected to the executive leadership of the Mycological Society of America, and will serve as vice president, president-elect, president and past president over the next four years.

Full Article

Mar 18, 2022

Alliance between College of Ag Sciences, University of Pretoria yields benefits

Developing solutions to address threats to plant health is the centerpiece of a partnership between Penn State’s College of Agricultural Sciences and the University of Pretoria in South Africa. The partnership is designed to increase both organizations’ research, teaching and extension impact and growth opportunities, thereby increasing food security and environmental stewardship.