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Lori A Hoagland

Horticulture and Landscape Architecture 

  • Associate Professor of Horticulture
765.494.1426
765.494.0391
Horticulture Room 314

Area of Expertise: Soil Microbial Ecology


Education:

  • PhD, Soil Microbiology and Biochemistry, Washington State University
  • MS, Agroecology, University of Nebraska-Lincoln
  • BS, Environmental Science, University of Nebraska-Lincoln
Currently teaching:
  • Introduction to Urban Agriculture (SFS/HORT31200; taught every fall)
  • The Plant Microbiome (HORT52500; taught in spring, even years)
  • Agricultural, Environmental and Community Sustainability in Costa Rica (Spring Break 2019)
  • Agroecology Field Course in Colombia (new study abroad course coming summer 2020)

Research program: 

The long-term goal of our lab is to support the continued growth and sustainability of local specialty crop (e.g. vegetables, herbs, fruit) production systems by identifying practical approaches to increase the productivity, quality and safety of produce, while ensuring that these systems more efficiently utilize nutrients and are more resilient to biotic and abiotic stress. Diversifying agricultural production systems in the U.S. Midwest with specialty crops  and integrating specialty crop production into urban centers can provide new sources of income, improve human health and well-being, and bring broad environmental benefits.  To effectively provide these benefits however, specialty crop growers need to deal with soils that are degraded and/or contaminated with pollutants, keep up with pest populations that are constantly evolving to overcome current forms of resistance, and adapt to changing climates such as heavier spring rains and prolounged periods drought. Speciatly crop growers also need varieties that are best adapted to their local production and environmental constraints, and produced food that is unique, nutritious and has exceptional flavor to be competitive in local marketplaces. 

In an effort to help specialty crop growers overcome these challenges,we study soil microbial ecology and beneficial plant-microbial relationships. The soil microbial community regulates many key agroecosystems services including nutrient cycling, pathogen dynamics and pollutant detoxification. Moreover, some soil microbes can form intimate associations with plants, helping them acquire nutrients and withstand biotic and abiotic stress. New genomic tools developed in the last decade have greatly expanded awareness of the abundance and diversity of soil and plant microbiomes, but understanding of how individual taxa evolve and proliferate in soil systems and mechanistically interact with plants to improve their health and performance is in its infancy. To overcome these knowledge gaps while ensuring that our research is relevant to the needs of growers, we combine applied studies designed to address key production challenges with fundamental research aimed at elucidating mechanisms regulating beneficial plant-soil-microbial relationships. We employ a participatory research approach that engages growers in identification of the most pertinent production challenges, along with development and dissemination of practical solutions using on-farm trials. Our studies integrate concepts of ecology to redesign specialty crop productions systems that are more efficient and resilient, and make use of local resources whenever possible to ensure that the management practices we develop are practical and economically feasible. Some of our studies are conducted in collaboration with vegetable breeders to identify germplasm that can best support beneficial plant-soil-microbial relationships, and identify practical approaches to integrate selection for these beneficial relationships into breeding programs. At the same time, we are contributing to the development of new improved vegetable varieties that are better adapted to low-input farming systems, and have unique end-use quality characteristics demanded by consumers.

Current projects in our lab are focused on:

  • Reducing heavy metal uptake in fruit and vegetable crops
  • Identifying biological approaches to reduce the severity of soil-borne and foliar pathogens in vegetable and mint cropping systems
  • Improving nitrogen-use efficiency in vegetable production systems
  • Developing new, improved tomato and carrot varieties that are best adapted to low-input farming systems, and yield produce that is nutritious and has good flavor
Additional insights out our research program can be found on the Hoagland Lab Website: www.purdue.edu/hla/sites/hoaglandlab/

    Awards & Honors

    (2015) Millionaire's Club Award. Purdue University.

    (2011) Millionaires Club Award. Purdue University.

    (2015) Acorn Seed of Excellence Award. Purdue University.

    (2011) International Travel Grant Award. Agriculture Research Program, Purdue University.

    (2011) Acorn Seed of Excellence Award. Purdue University.

    Selected Publications

    Hoagland, L., Ximenses, E., Ku, S., & Ladisch, M. (2018). Foodborne pathogens in horticultural production systems: ecology and mitigation. Scientia Horticulturae, 236, 192-206.

    Colla, G., Hoagland, L., Ruzzi, M., Cardarelli, M., Bonini, P., Canaguier, R., & Rouphael, Y. (2017). Biostimulant Action of Protein Hydrolysates: Unraveling Their Effects on Plant Physiology and Microbiome. Frontiers in Plant Science, 22, 1-14. doi:doi.org/10.3389/fpls.2017.02202

    Ximenes, E. A., Hoagland, L. A., Ku, S., & Ladisch, M. R. (2017). Human pathogens in biofilms: formation, physiology and detection. Biotechnology and Bioengineering. doi:10.1002/bit.26247

    Simon, P., Navazio, J., Colley, M., Hoagland, L. A., Roberts, P., DuToit, L., . . . McCluskey, C. (2017). The CIOA Project: Location, cropping system, and genetic background influence carrot performance including top height and flavor. Acta Horticulturacea. doi:https://doi.org/10.17660/ActaHortic.2017.1153.1

    Reeve, J., Hoagland, L. A., Villalba, J., Carr, P., Attucha, A., Cambardella, C., . . . Davis (2016). Organic farming, soil health, and food quality: Considering possible linkages. Advances in Agronomy, 137, 1-49.

    Rudisill, M., Turco, R. F., & Hoagland, L. A. (2016). Rhizosphere effects and fertility management influence nitrification and ammonia oxidizers in intensively managed vegetable production systems. Applied Soil Ecology, 99, 70-77.

    Shoaf, N., Egel, D. S., & Hoagland, L. A. (2016). Suppression of Phytophthora blight in sweet pepper depends on biochar amendment and soil type. Hortscience, 51(5), 518-524.

    Hallett, S. G., Hoagland, L. A., & Toner, E. (2016). Urban agriculture: environmental, economic and social perspectives. Horticulture Reviews, 44, 65-109.

    Hoagland, L. A. (2015). Breeding for beneficial plant-microbial relationships: how do we get there? Eucarpia Workshop On Implementing Plant-Microbe interaction in Plant Breeding,, 23-24.

    Rudisill, M., Turco, R. F., & Hoagland, L. A. (2015). Sustaining soil quality in intensively managed high tunnel vegetable production systems; a role for green manures and chicken litter. Hortscience, 50(3), 461-468.

    Horticulture & Landscape Architecture, 625 Agriculture Mall Drive, West Lafayette, IN 47907-2010 USA, (765) 494-1300

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