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N. Richard Knowles


(WSU faculty member since 1999)

N. Richard Knowles

Contact Info

Office: Johnson Hall 43
Phone: 509.335.3451

Areas of Interest

  • Potato agronomy, physiology, and variety development

Educational Background

  • Ph.D., Horticulture, Washington State University
  • M.S., Horticulture, Michigan State University
  • B.Sc. (honours), Biology, Queen’s University, Kingston, Ontario

Work Experience

  • Professor of Plant Science, Dept. of Agriculture, Food, and Nutritional Science, University of Alberta, Edmonton, Alberta
  • Assistant Professor of Plant Science, Dept. of Plant Science, University of British Columbia

Teaching Responsibilities

  • HORT 509/510 Graduate Seminar (2018/19)
  • Lecture modules in – Hort 416/516, Adv Hort Crop Physiology; Hort 425, Trends in Horticulture (capstone); Hort 490/590, Potato Science; Hort 320, Olericulture
  • Horticulture and Molecular Plant Sciences Graduate Programs

Program Personnel

  • G.N.M. Kumar, Associate Research Professor
  • Lisa O. Knowles, Assistant Research Professor
  • Nora Fuller, Ag. Research Tech. 3
  • Graham D. Ellis (PhD candidate, Horticulture, 2015-2019)
  • Cody J. Dean (MS, Horticulture, 2015-2018)
  • Rudy Garza, Farmer III (Othello)

Selected Publications

(*corresponding author)

Dean, CJ, Knowles LO and NR Knowles*.  2018.  Auxin modulates gibberellin-induced effects on growth, yield, and raw product recovery for frozen processing in potato (Solanum tuberosum L.).  Am J Pot Res 95: 622-641.

Kumar, GNM, Knowles LO and NR Knowles*.  2017.  Zebra chip disease enhances respiration and oxidative stress of potato tubers (Solanum tuberosum L.).  Planta 246:625-639.

Herman DJ, LO Knowles and NR Knowles*.  2017.  Heat stress affects carbohydrate metabolism during cold-induced sweetening of potato (Solanum tuberosum L.).  Planta 245:563-582.

Herman DJ, LO Knowles and NR Knowles*.  2016.  Low oxygen storage modulates invertase activity to attenuate cold-induced sweetening and loss of process quality in potato (Solanum tuberosum L.).  Postharvest Biol Tech 121:106-117.

Knowles LO and NR Knowles*.  2016.  Optimizing tuber set and size distribution for potato seed (Solanum tuberosum L) expressing varying degrees of apical dominance.  J Plant Growth Regul 35:574-585.  DOI: 10.1007/s00344-015-9562-1.

Kumar, GNM, Knowles LO and NR Knowles*.  2015.  Zebra chip disease decreases tuber (Solanum tuberosum L.) protein content by attenuating protease inhibitor levels and increasing protease activities.  Planta 242:1153-1166.

Blauer, JM, Knowles, LO and NR Knowles*.  2013.  Evidence that tuber respiration is the pacemaker of physiological aging in seed potatoes (Solanum tuberosum L.).  J Plant Growth Regul 32:708-720.

Knowles, L.O. and N.R. Knowles*.  2012.  Toxicity and metabolism of exogenous α,β-unsaturated carbonyls in potato (Solanum tuberosum L.) tubers.  J Ag Food Chem 60: 11173-11181.

Weeda, SM, Kumar, GNM, and NR Knowles.  2010.  Correlative changes in proteases and protease inhibitors during mobilization of protein from potato (Solanum tuberosum L.) seed-tubers.  Functional Plant Biology 37:32-42.