College of Agriculture & Natural Resources Department of Horticulture

Teaching

I do not have a formal teaching appointment, but maintain an active role in teaching and advising of undergraduates, graduates and students.

Research Interests

My research program is focused on assessing the quality of harvested plant products and the development of technological interventions to improve quality maintenance. Primary Michigan crops include apples and sugar beets, but work has also included bananas, tomatoes, broccoli, lettuce, mushrooms, blueberries, and strawberries. Much of the work is focused on developing protocols for storage using modified atmospheres via controlled atmosphere rooms or in polymeric packages. Packaging studies include mathematical model development for predicting the performance of packaged produce. Fundamental studies have begun to elucidate the biochemistry and molecular biology of the formation of odor-active volatiles in fresh produce. 

Dr. Beaudry's research efforts are supported by a well-equipped laboratory suite. Instrumentation and facilities in use include dedicated O2/CO2 analyzers, numerous gas chromatographs, GC/mass spectrometer, chloroplast fluorometer, colorimeter, spectrophotometers, wet lab, sterile hood, 28 12-bushel CA chambers, 16 controlled environment rooms, packaging facility, computer lab, etc. Partnering relationships have been established with Plant Biology, the MSU School of Packaging, Agricultural Engineering and Food Science and Human Nutrition.  Dr. Beaudry maintains international linkages in the areas of shipping quality maintenance (India and Chile) and fruit biochemistry (Chile).

Much of Dr. Beaudry's research service-oriented. Examples would include carrot storage experiments with Gerber Foods Co.; root pruning effects on apple quality and storability, and apple storage techniques. Recently, applied research has been focused on the preservation of the 'Honeycrisp' apple variety.  The focus has been reducing injury to the fruit in response to chilling injury and controlled atmosphere storage. Recent findings have shown that 'Honeycrisp' fruit can be desensitized to the low temperatures and modified atmospheres of the storage environment by a short exposure to elevated temperatures just after harvest in a process known as conditioning.

Fundamental research has recently revealed the presence of a new pathway [Citramalate-Pathway] for the synthesis of fatty acids in plants via a 1-carbon elongation mechanism.  This pathway is engaged in ripening apple fruits and synthesizes precursors to esters, which are important aroma compounds in apple and many other fruit.  In addition, we are also evaluating additional routes for the formation of ester precursors involving the well-known 2-carbon elongation mechanism and the lipoxygenase pathway [LOXvolatiles] for lipid degradation.

Recent activity also includes the development of evaporatively-cooled and solar-refrigerated storage structures for base-of-the-pyramid farmers in India and other developing countries. Working with Dr. Sangeeta Chopra of the Indian Agricultural Research institute in Delhi and Dr. Norbert Mueller in Mechanical Engineering here at MSU, we designed and constructed low-cost, battery less, off-grid prototype refrigeration systems that can be partially self-built by the farmer. These units are currently being evaluated in India.

Extension

Resource to Cooperative Extension Service field agents and growers in the areas of:

• Apple harvest maturity evaluation
• Apple storage disorders-Recommendations for air and CA storage of apple and blueberry fruit
• Blueberry harvest and storage operations
• Modified atmosphere packaging
• Effects of ReTain on fruit maturation and storability
• Effects of 1-MCP on fruit ripening and storability
• Cultivar effects on apple slice quality
• Control of storage disorders
• Mechanical harvest and handling of blueberries

Coordinator of MSU Controlled Atmosphere and Storage Clinic (CA Clinic)

The CA Clinic audience is primarily apple storage operators from the Great Lakes region and Canada. Clientele response to the CA Clinic has been entirely favorable and meeting turnout has been consistently good. Storage operators are kept up-to-date on most recent changes in CA and packinghouse regulations, methods for increasing efficiency of CA operations and techniques for improving their ability to maintain high fruit quality. Over the twelve years of the program, more than 1200 pages of printed material have been made available to constituency groups through the CA Clinic notebooks. Invited and featured speakers have been brought in from across the country and around the world.

Faculty Coordinator of Apple Maturity Program

Maturity is known to affect the storability of both apple and blueberry fruit. Harvesting these commodities at the appropriate maturity stage has the potential to optimize firmness retention and freedom from defects, while assuring appearance, flavor, size, and texture attributes are satisfactory. Accurately assessing fruit maturity, however, is difficult and techniques for optimizing maturity assessment are much needed by growers.

Through the use of conference call, websites, and FAXes with regional CES agents, information is shared with Michigan shippers, packing houses, storage operators and growers. Grower response has been very positive; they feel much more confident in their ability to harvest fruit in a timely fashion and maximize fruit storage potential. This program is now funded by the Michigan Apple Shippers on an annual basis and augmented by funds from Valent BioSciences, the manufacturer of ReTain.

Selected Recent Publications

Sugimoto, N., P. Engelgau, A.D. Jones, J. Song, and R.M. Beaudry. 2021. Citramalate synthase yields a biosynthetic pathway for isoleucine and straight- and branched-chain ester formation in ripening apple fruit. Proc. Nat. Acad. Sci. 118(3) e2009988118. 10 pp. https://doi.org/10.1073/pnas.2009988118.

Gil, M.I. and R.M. Beaudry. 2020. Controlled and Modified Atmospheres for Fresh and Fresh-Cut Produce, Academic Press, ISBN 978-0-12-804599-2,  649 pp.

Bishop, D., J. Schaefer, and R.M. Beaudry. 2020. Industrial advances of CA/MA technologies: innovative storage systems. p 265-276. In: Controlled and Modified Atmospheres for Fresh and Fresh-Cut Produce, Academic Press, ISBN 978-0-12-804599-2.

Madrid, M. and R.M. Beaudry. 2020. Small fruits: Raspberries, blackberries, blueberries. p. 335-346. In: Controlled and Modified Atmospheres for Fresh and Fresh-Cut Produce, Academic Press, ISBN 978-0-12-804599-2.

Staples, R., R. L. LaDuca, L. V. Roze, M. Laivenieks, J. E. Linz, R. Beaudry, A. Fryday, A. L. Schilmiller, A. V. Koptina, B. Smith, F. Trail. 2020. Structure and Chemical Analysis of Major Specialized Metabolites Produced by the Lichen Evernia prunastri. Chem. Biodiv. 17, e1900465.

Awalgaonkar, G. R. Beaudry, and E. Almenar. 2020. Ethylene-removing packaging: Basis for development and latest advances. Compr. Rev. Food Sci. Food Saf. 2020;1–28.  DOI: 10.1111/1541-4337.12636.

Mahangade, P.S., I. Mani, R. Beaudry, N. Müller, and S. Chopra. 2020. Using Amaranth as a Model Plant for Evaluating Imperfect Storages: Assessment of Solar-refrigerated Structures in India. HortScience https://doi.org/10.21273/HORTSCI15249-20.

Tong, C., R. Beaudry, C. Contreas, C.B. Watkins, J.F. Nock, Z. Vickers,K. Zhang, J.J. Luby, and D. Bedford. 2019. Postharvest Performance of ‘Minneiska’ Apple, a Progeny of ‘Honeycrisp’. J. Amer. Pomological Soc., 73:82-94.

Beaudry, R., 2019. Atmosphere Control in Packages and CA Rooms: Biology, Technology, and Future Opportunities. Acta Hort. 1256:541-548. 

Neto, A.C., R. Beaudry, M. Maraschin, R.M. Di Piero, and E. Almenar. 2019. Innovative composite wall designs for evaporative cooled storage structures Indian J. Agric. 88:1692-1695.

Alsmairat, N., P. Engelgau, and R. Beaudry. 2018. Changes in free amino acid content in the flesh and peel of ‘Cavendish’ banana fruit as related to branched-chain ester production, ripening, and senescence. J. Amer. Soc. Hort. Sci. 143(5):1–11.

Chopra, S. and R. Beaudry. 2018. Innovative composite wall designs for evaporative cooled storage structures Indian J. Agric. 88:1692-1695.

Noureddine, B. and R.M. Beaudry. 2018. Effects of temperature on postharvest respiratory parameters and quality attributes of ackee (Blighia sapida Köenig) fruit arils during storage. Int. Food Res. J. 25(1): 119-126.

Chopra, S., and R. Beaudry. 2018. Redesigning evaporatively cooled rooms to incorporate solar powered refrigeration in India. Acta Hort. 1194:609-615.

Gallardo, R.K., E.T. Stafne, L.W. DeVetter, Q. Zhang, C. Li, F. Takeda,
J. Williamson, W.Q. Yang, W.O. Cline, R. Beaudry, and R. Allen. 2018. Blueberry producers’ attitudes toward harvest mechanization for fresh market. HortTechnology, 28:10-16.

Guimarães, G.H., S. de Melo Silva, R. Silva, M. Madruga, A.S. Sousa, A. Brito, and R. Beaudry. 2018. Effect of plant-based coatings on the volatile profile of 'Pérola' pineapple. Acta Hort. 1194, 1519-1526. DOI: 10.17660/ActaHortic.2018.1194.212.

Iqbal, Z., Randhawa, M. A., Zahoor, T., Asghar, M., & Beaudry, R. 2018. Influence of 1-methylcyclopropene on physico-chemical properties of ‘gola’ and ‘surahi’ guava (Psidium guajavaL.) under air storage. Pakistan J. Agric. Sci, 55(2):389-396. DOI: 10.21162/PAKJAS/18.6453.

Lobos, G.A., C. Bravo, M. Valdés, J. Graell, I. Lara, R.M. Beaudry, and C. Moggia. 2018. Within-plant variability in blueberry (Vaccinium corymbosum L.): maturity at harvest and position within the canopy influence fruit firmness at harvest and postharvest. Postharvest Biology Technol. 146:26-35.

Gomes, M.H., Beaudry, R.M., and Almeida, D.P.F. 2018. Volatile profile of fresh-cut ‘Rocha’ pear under various temperatures and oxygen levels. Acta Hort. 1209:247-250.

Chopra, S. S. Dhumal, P. Abeli, R. Beaudry, E. Almenar. 2017. Metal-organic frameworks have utility in adsorption and release of ethylene and 1-methylcyclopropene in fresh produce packaging. Postharvest Biol. Technol. 130:48-55.

Guimarães, G.H., R.L. Dantas, A.S. Bezerra de Sousa, L.G. Soares, R. de Sá Melo, R. Sousa da Silva, R.P. Lima, R.M. Mendonça, R.M. Beaudry and S. de Melo Silva. 2017.  Impact of cassava starch-alginate based coatings added with ascorbic acid and elicitor on quality and sensory attributes during pineapple storage. African J. Ag. Res. 12:664-673.
 
Moggia, C., R.M. Beaudry, J. Retamales, G.A. Lobos. 2017.Variation in the impact of stem scar and cuticle on water loss in highbush blueberry fruit argue for the use of water permeance as a selection criterion in breeding. Postharvest Biol. Technol. 132:88-96.

Silva, R.S., Silva, S.M., Melo, F.S.N., Guimarães, G.H.C., Madruga, M.S., Lima, R.P. and Beaudry, R.M. 2016. Influence of biodegradable coatings on the volatiles profile of fresh-cut 'Paluma' guava. Acta Hortic. 1141: 319-326. DOI: 10.17660/ActaHortic.2016.1141.40

Contreras, C., H. Tjellström, R.M. Beaudry. 2015. Relationships between free and esterified fatty acids and LOX-derived volatiles during ripening in apple. Postharvest Biol. Technol. 112: 105-113. 

Evans, J.M., V.A. Vallejo, and R.M. Beaudry. 2015. Warner daily light integral influences steviol glycoside biosynthesis and relative abundance of specific glycosides in stevia. HortScience 50: 1479-1485.

Schwab, W., D. Schiller, C. Contreras, J. Vogt, F. Dunemann, B. Defilippi, and R. Beaudry. 2015. A dual positional specific lipoxygenase functions in the generation of flavor compounds during climacteric ripening of apple Accepted, Hort. Research (Nature).

Sugimoto, N., P. Forsline, and R. Beaudry. 2015. Volatile profiles of members of the USDA Geneva Malus core collection: Utility in evaluation of a hypothesized biosynthetic pathway for esters derived from 2-methylbutanoate and 2-methylbutan-1-ol. Accepted, J. Ag. Food Chem.;

Switzenberg, J.A., R.M. Beaudry, and R.Grumet. 2014. Effect of CRC::etr1-1 transgene expression on ethylene production, sex expression, fruit set and fruit ripening in transgenic melon (Cucumis melo L.). Transgenic Research. DOI: 10.1007/s11248-014-9853-5

González-Buesa, J., Page, N, Kaminski, C, Ryser, E, Beaudry, R, Almenar, E. 2014. Effect of non-conventional atmospheres and bio-based packaging on the quality and safety of Listeria monocytogenes-inoculated fresh-cut celery (Apium graveolens L.) during storage. Postharvest Biol. Technol. 93: 29-37.

Verlinden, S., SM Silva, RC Herner, and RM Beaudry. 2014. Time-dependent changes in the longitudinal sugar and respiratory profiles of asparagus spears during storage at 0 °C. J. Amer. Soc. Hort. Sci. 139(4):339-348. 2014.

Contreras, C., N. Alsmairat, and R. Beaudry. 2014. Prestorage conditioning and diphenylamine improve resistance to controlled-atmosphere-related injury in ‘Honeycrisp' apples. HortScience 49:76-81.

Gomes M.G. Beaudry, R.M., and D. Almeida. 2012.Influence of oxygen and temperature on the respiration rate of fresh-cut cantaloupe and implications for modified atmosphere packaging. Hortscience 47:1113-1116.

Roze, L.V., Beaudry, R.M., and J.E. Linz. 2012. Analysis of volatile compounds emitted by filamentous fungi using solid-phase microextraction-gas chromatography/mass spectrometry. Meth. Molecular Biol. 944:133-142.

Cen, H., Lu, R., Mendoza, F., and R. Beaudry. 2013. Relationship of the optical absorption and scattering properties with mechanical and structural properties of apple tissue. Postharvest Biol. Technol. 85: 30-38.

Contreras, C. and R.M. Beaudry. 2013. Lipoxygenase-associated apple volatiles and their relationship with aroma perception during ripening. Postharvest Biol. Technol., 82:28-38. 

Siddiq, M., J. B. Harte, R. M. Beaudry, K D. Dolan, S. P. Singh, and K. Saha. 2013. Physicochemical properties of whole fruit and sensory quality of fresh-cut apples pre-treated with 1-methylcyclopropene (1-MCP). Int'l. J. Food Prop. 17:1081-1092.

Tong, C., S.J. McKay, J.J. Luby, R.M. Beaudry, C. Contreras, J. F. Nock, and C.B. Watkins. 2013. Using mixed-effects models to estimate the effect of harvest date and its interactions with post-harvest storage regime on apple fruit firmness. J. Hort. Sci. Biol. 88:29-36.

Dilley, D.R., Z. Wang, D.K. Kadirjan-Kalbach, F. Ververdis, R. Beaudry, and K. Padmanabhan. 2013. 1-Aminocyclopropane-1-carboxylic acid oxidase reaction mechanism and putative post-translational activities 
of the ACCO protein. AoB Plants. doi:10.1093/aobpla/plt031.

Shafii, B., R. Vismeh, R. Beaudry, R, Warner, and A. Daniel Jones. 2012. Large-scale profiling of diterpenoid glycosides from Stevia rebaudiana using ultrahigh performance liquid chromatography/tandem mass spectrometry. Anal. Bioanal. Chem. 403:2683–2690.

Alsmairat, N., C. Contreras, J. Hancock, P. Callow, and R. Beaudry. 2011. Use of Combinations of Commercially-Relevant O2 and CO2 Partial Pressures to Evaluate the Sensitivity of Nine Highbush Blueberry Fruit Cultivars to Controlled Atmospheres. HortScience. 46:74-79.

van Nocker, S., G. Berry, J. Najdowski, R. Michelutti, M. Luffman, P. Forsline, N. Alsmairat, R. Beaudry, M. G. Nair, M. Ordidge. 2012. Genetic diversity of red-fleshed apples (Malus). Euphytica. 185(2):281-293.

Sugimoto, N., D. Jones, and R.M. Beaudry. 2011. Changes in Free Amino Acid Content in ‘Jonagold' Apple Fruit as Related to Branched-chain Ester Production, Ripening, and Senescence. J. Amer. Soc. Hort. Sci., 136:429-440.

Gomes, M.H., R.M. Beaudry, D.F. Almeida, and F.X. Malcata. 2010. Modelling respiration of packaged fresh-cut ‘Rocha' pear as affected by oxygen concentration and temperature. J. Food Eng. 96:74-79.

Beaudry, R.M. and Vallejo, F. 2010. Comparing the function of perforated and non-perforated film in MAP: Impact on the quality of broccoli. Proc. 9th Int'l Controlled Atmosphere Conference. Acta Hort. 857:503-512.

Vallejo, F. and R. M. Beaudry. 2010. Absorption of 1-MCP by non-target materials during storage. Proc. 9th Int'l Controlled Atmosphere Conference. Acta Hort. 857:513-520.

Beaudry, R. 2010. Future Trends and Innovations in Controlled Atmosphere Storage and Modified Atmosphere Packaging Technologies. Proc. 10th Int'l Controlled and Modified Atmosphere Conference, Acta Hort. 876:21-28.

Kang, J-H., Liu, G., Shi, F., Jones, A.D., Beaudry, R.M., and G.A. Howe. 2010. The Tomato odorless-2 Mutant is Defective in Trichome-Based Production of Diverse Specialized Metabolites and Broad-Spectrum Resistance to Insect Herbivores. Plant Physiology. 115:262-272.

Ambaw, A., P. Verboven, R. Beaudry, Q. Tri Ho., A. Schenk, and B.M. Nicolai. 2010. Modeling the diffusion-adsorption kinetics of 1-methylcyclopropene (1-MCP) in apple fruit and non-target materials in storage rooms. J. Food Eng. 102:257-265.

Roze, L.V., Chanda, A., Laivenieks, M., Beaudry, R.M., Artymovich, K.A., Koptina, A.V., Awad, D.W., Valeeva, D., Jones, A.D., and J.E. Linz. 2010. Volatile profiling reveals intracellular metabolic changes in Aspergillus parasiticus: veA regulates branched chain amino acid and ethanol metabolism. BMC Biochemistry, 11:33-48.

Guevara, J.C., L. Cedeno, E.M. Yahia, and R.M. Beaudry. 2009. Modelling of temperature and relative humidity effect on respiration rate of Nopalitos. Proc. 6th International Congress on Cactus and Cochineal, Joao Pessoa, Brazil Oct. 22-26, 2007, F.A.P. Campos , J.C.B. Dubeux, Jr., and S. De Melo Silva, (eds.). Acta Hort. 811:161-166.

Hancock, J., Callow, P., Serce, S., Hanson, E., and Beaudry, R. 2008. Effect of cultivar, controlled atmosphere storage, and fruit ripeness on the long-term storage of highbush blueberries. HortTechnology, 18(2):199-205.

Gomes, H., Beaudry, R., and Almeida, D. 2008. Temperature Effect on respiratory parameters of packaged fresh-cut pear and melon fruits. Conference proceedings, IFPA meeting, Las Vegas, Nevada.

Gomes, M.H., Beaudry, R.M., Almeida, D.P.F., and Malcata, F.X. 2008. Respiration of fresh-cut cantelope melon fruit as a function of packaged oxygen concentration and temperature. Pages 616 to 622 in Advances en maduracion y post-recoleccion de fruitas, (Almudi, R.O, Val Falcon, J. and Ferrer Mairal, A. eds.), Proc. 9th Iberian National Symposium on Maturation and Postharvest 2008. September 23-26, Zaragoza, Spain.

Sugimoto N., S. Park, S. van Nocker, and R. Beaudry. 2008. Gene expression associated with apple aroma biosynthesis. Acta Horticulturae.768:57-64.

Beaudry, R.M. 2007. Overview of Research and Education Strategies - Postharvest Perspective. Proc. Expert Consultation Meeting to Strengthen Linkages between Postharvest & Biotechnology, Hammamet, Tunesia, 12-14 Sept. 2006, FAO Regional Office for the Near East, p. 107-114.

Nanthachai, N., Ratanachinakorn, B., Kosittrakun, M., and R. Beaudry. 2007. Absorption of 1-MCP by fresh produce. Postharvest Biol. Technol.43:291-297.

Gunterus, A., L.V. Roze, R. Beaudry, and J.E. Linz. 2007. Ethylene inhibits aflatoxin biosynthesis in Aspergillus parasiticus grown on peanuts. Food Microbiology 24:658-663.

Roze, L., Beaudry, R.M., Arthur, A.E., Calvo, A.M., and Linz, J.E. 2007.  Aspergillus Volatiles Regulate Aflatoxin Synthesis and Asexual Sporulation in Aspergillus parasiticus. Appl. Env. Microbiol. 73:7268-7276.

Fan, L., Song, J., Beaudry, R.M., and Hildebrand, P.D. 2007. Effect of hexanal vapor on the growth of postharvest pathogens and fruit decay., J. Food Sci., 71(3):105-109.

Lee Y.S., Beaudry R., Kim J.N., and B.R. Harte. 2006. Development of a 1-Methylcyclopropene (1-MCP) Sachet Release System. J Food Sci 71(1):1-6.

Cañoles, M.A., Li, C., Howe, G. and R.M. Beaudry.  2006. Deficiency of linolenic acid in Lefad7 mutant tomato changes the volatile profile and sensory perception of disrupted leaf and fruit tissue. J. Amer. Soc. Hortic. Sci.131:284-289.

Vallejo, F., and R.M. Beaudry. 2006. Depletion of 1-MCP by 'non-target' materials from fruit storage facilities. Postharvest Biol. Tech. 40:177-182.

Fan, L., J. Song, R. Beaudry, and P.D. Hildebrand. 2006. Effect of hexanal vapor on spore viability of Penicillium expansum, lesion development on whole apples, and fruit volatile biosynthesis. J. Food Sci. 17(3):105-109.

Park, S., N. Sugimoto, M.D. Larson, R. Beaudry, and S. van Nocker. 2006. Identification of genes with potential roles in apple fruit development and biochemistry through large-scale statistical analysis of expressed sequence tags. Plant Physiol. 140:811-824.

Guevara, J.C., E.M. Yahia, R.M. Beaudry, and L. Cedeño. 2006. Modeling the influence of temperature and relative humidity on respiration rate of prickly pear cactus cladodes. Postharvest Biol. Technol. 41:260-265.

Beaudry, R.M., V. Luckanatinvong, and T. Solomos. 2006. Maintaining quality with CA and MAP. In: A.C. Purvis, W.B. McGlassen, and S. Kanlayanarat (eds.), Proc. Int'l Conference on Managing Quality in Chains (MQUIC). Acta Horticulturae 712:245-252.

Ferenczi, A., Song J., Tian M., Vlachonasios K., Dilley D., Beaudry R. 2006. Volatile ester suppression and recovery following 1-methylcyclopropene application to apple fruit J. Amer. Soc. Hort. Sci.131(5):691-701.

Lu, R., A. Srivastava, and R. Beaudry. 2005. A new bioyield tester for measuring apple fruit firmness. Amer. Soc. Ag. Eng. 21(5):893-900.

Carrasco, B., J.F. Hancock, R.M. Beaudry, and J.B. Retamales. 2005. Chemical composition and inheritance patterns of aroma in Fragaria×ananassa and Fragaria virginiana progenies. HortScience, 40:1649-1650.

Watkins, C.B., M. Erkan, J.F. Nock, K.A. Iungerman, R.M. Beaudry, and R.E. Moran 2005. Harvest date effects on maturity, quality and storage disorders of 'Honeycrisp' apples. HortScience, 40:164-169.

Gao, Zhifang, S. Jayanty, R. Beaudry, and W. Loescher 2005. Sorbitol transporter expression in apple sink tissues: Implications for fruit sugar accumulation and watercore development. J. Amer. Soc. Hortic. Sci. 130(2):261-268.

Roze, L.V., A.M. Calvo, A. Gunterus, R. Beaudry, M. Kall, and J.E. Linz. 2004. Ethylene modulates development and toxin synthesis in Aspergillus possibly via an ethylene sensor-mediated signalling pathway.  J. Food Protection. 67:438-447.

Mir, N., M. Canoles, R. Beaudry, E. Baldwin and C. Mehla.  2004.  Inhibition of tomato ripening by 1-methylcyclopropene. J. Amer. Soc. Hort. Sci. 129:112-120.

Jayanty, S., M. Canoles, and R.M. Beaudry.  2004.  Concentration-dependence of 'Redchief Delicious' apple fruit softening and chlorophyll fluorescence to repeated doses of 1-methylcyclopropene. J. Amer. Soc. Hort. Sci.129:760-765.

Roze, L.V., R.M. Beaudry, N.P. Keller, and J.E. Linz. 2004. Reculation of aflatoxin synthesis by FadA/cAMP/protein kinase A signalling in Aspergillus parasiticus.  Mycopathologia, 158:219-232.

Watkins, C.B.,  J.F. Nock , S.A. Weis, S. Jayanty,  and R.M. Beaudry. 2004. Storage temperature, diphenylamine, and pre-storage delay effects on soggy breakdown, soft scald and bitter pit of 'Honeycrisp' apples. Postharvest Biology and Technology 32:213-221.

Tong, C., D.S. Bedford, J.L. Luby, FM. Prompson, R.M. Beaudry, J.P. Mattheis, C.B. Watkins, and S.A. Weis. 2003. Location and temperature effects on soft scald in 'Honeycrisp' apples. HortScience 38:1153-1155.

Goodridge, CF; R.M. Beaudry; J.J. Pestka, and D.M. Smith. 2003. Solid phase microextraction-gas chromatography for quantifying headspace hexanal above freeze-dried chicken myofibrils. J. Ag. and Food Chem. 51:4185-4190.

Goodridge, C.F., R.M. Beaudry, J.J. Pestka, and D.M. Smith. 2003. ELISA for monitoring lipid oxidation in chicken myofibrils through quantification of hexanal-protein adducts.  J. Agric. Food Chem.51:4185-4190.

Beaudry, R.M.2002. Modified Atmosphere Packaging. In "The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks", USDA Handbook 66, K. Gross, ed. (in press).

Mir, N., and R.M. Beaudry 2002. Atmosphere Control Using Oxygen and Carbon Dioxide. In "Fruit Quality and its Biological Basis" M. Knee, ed. Sheffield Academic Press, Sheffield, U.K.

Jayanty, S., J. Song, N.M. Rubinstein, A. Chong, and R.M. Beaudry. 2002. Temporal relationship between ester biosynthesis and ripening events in banana fruit. J. Amer. Soc. Hortic. Sci. 127:998-1005.

Mir, N., E. Curell, N. Khan, M. Whitaker, and R.M. Beaudry. 2001. Harvest maturity, storage temperature, and 1-MCP application frequency alter firmness retention and chlorophyll fluorescence of 'Redchief Delicious' apples. J. Amer. Soc. Hort. Sci. 126:618-624.

Mir, N. and R.M. Beaudry. 2001. Use of 1-MCP to reduce the requirement for refrigeration in the storage of apple fruit. Proc. 4th Int'l. Conf. on Postharvest Physiology, Acta Hort, 553:577-580.

Mir, N. and R.M. Beaudry. 2001. Use of a gas-release patch to regulate ethylene-mediated plant responses. Proc. 4th Int'l. Conf. on Postharvest Physiology, Acta Hort, 553:581-582.

Mir, N. and R.M. Beaudry. 2001. Interplay of O₂ and C₂H₄ on climacteric respiration. Proc. 4th Int'l. Conf. on Postharvest Physiology, Acta Hort, 553:651-655.

Lu, R., D.E. Guyer, and R.M. Beaudry 2000. Determination of firmness and sugar content of apples using near-infrared diffuse reflectance. J. Textural Stud. 31:615-630

Beaudry, R.M. 2000. Introduction. Workshop Proceedings: "Aroma generation by horticultural products: What can we control?" HortScience, 35:1001-1002.

Beaudry, R.M. 2000. Responses of horticultural commodities to low oxygen: limits to the expanded use of modified atmosphere packaging. HortTechnology. 10:491-500.

Beaudry, R.M. 1999. Effect of O₂ and CO₂ partial pressure on selected phenomena affecting fruit and vegetable quality. Postharvest Biol. Tech. 15:293-303.

Mir, N., and R.M. Beaudry. 1999. Effect of superficial scald suppression by diphenylamine application on volatile aroma biosynthesis. J. Ag. Food Chem. 47:7-11.

Mir, N., M. Wendorf and R.M. Beaudry. 1999. Detection of a post-storage burst in 6-methyl-5-hepten-2-one from apple fruit. J. Amer. Soc. Hort. Sci. 124:173-176.

Lakakul, R., R.M. Beaudry and R. Hernandez. 1999. Modeling respiration of apple slices in modified-atmosphere packages. J. Food Sci. 64:105-110.

Mir, N., M. Wendorf, R. Perez and R.M. Beaudry. 1998. Chlorophyll fluorescence as affected by some superficial defects in stored apple. J. Hort. Sci. Biotech. 73(6):846-850.

Beaudry, R., W. Deng, R. Lakakul and J. Song. 1998. Interactions between the package and the packaged product: Effects on respiratory and aroma volatiles. Proc. Int'l Postharvest Science Conference: Postharvest 96, August 4 - 9, 1996, Taupo, New Zealand, R. Bielski, W. Laing, and C. Clarke, eds. Acta Horticulturae 464:327 - 332.

Song, J., R. Leepipattanawit, W. Deng and R. Beaudry. 1998. Hexanal vapor acts as a residueless antifungal agent that enhances aroma biosynthesis in apple fruit. Proc. Int'l Postharvest Science Conference: Postharvest 96, August 4 - 9, 1996, Taupo, New Zealand, R. Bielski, W. Laing, and C. Clarke, eds. Acta Horticulturae 464:327 219- 224.

Song, J, L. Fan and R.M. Beaudry. 1998. Application of solid phase microextraction and GC/TOFMS for rapid analysis of flavor volatiles in tomato and strawberry fruits. J. Ag. Food Chem. 46(9):3721-3726.

Mir, N., M. Wendorf, R. Perez and R.M. Beaudry. 1998. Chlorophyll fluorescence in relation to superficial scald development in apple. J. Amer. Soc. Hort. Sci. 123(5):887-892.

Beaudry, R.M., C.E. Moggia, J.B. Retamales and J.F. Hancock. 1998. Effect of maturity, shipping mode and storage regime on the quality of 'Ivanhoe' and 'Bluecrop' blueberry fruit transported from Chile. HortScience 33:313-317.

Perez, R. and R.M. Beaudry. 1998. Fractional surface coating technique to modify gas diffusion and ripening in banana (Musa sp.). J. Amer. Soc. Hort. Sci. 123(1):115-118.

Song, J., W. Deng, L. Fan, J. Verschoor and R.M. Beaudry. 1997. Aroma volatile and quality changes in modified atmosphere packaging. Proc. Seventh Int'l Controlled Atmosphere Research Conf.: Fresh-Cut Fruits and Vegetables and MAP, 13-18 July, 1997, Univ. of California, Davis, CA., J. Gorny, ed. pp. 89-95.

Silva, S.M., J.E. Everard, R.C. Herner and R.M. Beaudry. 1997. Glycolytic respiratory intermediates in asparagus tips under low oxygen/high carbon dioxide atmospheres. Proc. Seventh Int'l Controlled Atmosphere Research Conf., Vegetables and Ornamentals, July 13-18, Univ. of California, Davis, CA., M. Saltveit, ed. pp. 13-19.

Leepipattanawit, R., R.M. Beaudry and R.J. Hernandez. 1997. Control of decay in modified-atmosphere packages of sliced apples using 2-nonanone. J. Food Sci. 62:1043-1047.

Beaudry, R.M., J. Song, W. Deng, M. Mir, P. Armstrong and E.J. Timm. 1997. Chlorophyll fluorescence: A nondestructive tool for quality measurements of stored apple fruit. Trans. ASAE, Proc., Sensors for nondestructive testing: Measuring the quality of fresh fruits and vegetables, Feb. 18-21, 1997, Orlando, FL.

Song, J., B.D. Gardner, J.F. Holland and R.M. Beaudry. 1997. Rapid analysis of volatile flavor compounds in horticultural produce using SPME and GC/time-of-flight mass spectrometry. J. Ag. Food Chem. 45:1801-1807.

Song, J., W. Deng, R.M. Beaudry and P.R. Armstrong. 1997. Changes in chlorophyll fluorescence of apple fruit during maturation, ripening and senescence. HortScience 32:891-896.

Lakakul, R., R.M. Beaudry and R.J. Hernandez. 1996. Modeling respiration and package oxygen partial pressure for apple slices in modified-atmosphere packages. (submitted to ASHS).

Cameron, A.C., R.M. Beaudry, N.H. Banks and M. Yelanich. 1994. Modified atmosphere packaging of blueberry fruit: Modeling respiration and package oxygen partial pressures at different temperatures. J. Amer. Soc. Hortic. Sci. 119:534-539.

Beaudry, R.M. 1993. Effect of carbon dioxide partial pressure on blueberry fruit respiration and respiratory quotient. Postharvest Biol. Tech. 3:249-258.

Beaudry, R.M., P. Schwallier and M. Lennington. 1993. Apple maturity prediction: An extension tool to aid fruit storage decisions. HortTechnology 3:233-239.

Beaudry, R.M. and C.D. Gran. 1993. Using a modified-atmosphere packaging approach to answer some postharvest questions: Factors influencing the lower O2 limit. Acta Hort. 362:203-212.

Beaudry, R.M., A.C. Cameron, A. Shirazi and D.L. Dostal-Lange. 1992. Modified atmosphere packaging of blueberry fruit: Effect of temperature on package oxygen and carbon dioxide. J. Amer. Soc. Hortic. Sci. 117:436-441.

Beaudry, R.M., R. Severson, C.C. Black and S.J. Kays 1989. Banana Ripening: Implications of changes in the concentration of critical glycolytic intermediates and fructose 2,6-bisphosphate. Plant Physiol. 91: 1436-1444.

Beaudry, R.M. and S.J. Kays 1988.  Ethylene releasing compounds in agriculture. In "Foliar Application and Leaf Applied Chemicals", P. Neumann, ed., CRC Press, Boca Raton, FL pp 127-156.

Program Areas

Fruit - Pomology

• Modeling respiration of apple slices in modified-atmosphere packages
• Inhibition of fungal activity and enhancement of aroma biosynthesis in apple slices
• Changes in chlorophyll flurorescence of apple fruit during maturation, ripening and senescence
• Respiratory and fermentative metabolisms in asparagus tips under low O2/High CO2 atmosphere
• Regulation of the steady state oxogen in asparagus spears tips: responses of glycolytic metabolism and sucrose-metabolizing enzymes under low oxogen/high carbon dioxide atmospheres
• Phosphate and nucleotide metabolism under low O2 and high CO2 partial pressures 
• The physiology, biology and biochemistry of ester formation

Post-harvest

Dr Beaudry's research activities focus on preserving the postharvest quality of fruits and vegetables. Specific areas of expertise include shipping and handling assessment, modified atmosphere packaging, controlled-atmosphere storage, non-destructive quality assessment, flavor analysis, apple scald physiology, molecular biology and biochemistry of aroma compound production, and use of volatiles to inhibit decay. Spinoffs from research have lead to the development of a number of practical devices or methods for which patent applications have been submitted.