Estimating Phenylalanine Ammonia-lyase Activity in Common Beans Inoculated with Sclerotinia sclerotiorum

in HortScience
View More View Less
  • 1 Tropical Agricultural Research Station, Agricultural Research Service, U.S. Department of Agriculture, P.O. Box 70, Mayaguez, PR 00681
  • 2 Department of Crop and Weed Sciences, North Dakota State University, Fargo, ND 58105-5051

We investigated the partial physiological resistance (PPR) of common beans (Phaseolus vulgaris L.) to white mold disease caused by Sclerotinia sclerotiorum (Lib.) deBary. The activity of phenylalanine ammonia-lyase (PAL) was measured in detached stems inoculated with a growing mycelium of the pathogen. Noninoculated detached stems and whole plants were included as controls. Five bean cultivars-Upland, Bunsi, Sierra, UI-114, and Montcalm-and one breeding line-NY 5394-were tested; all varied in PPR to white mold disease. Greater PAL activity in the resistant NY 5394 than in the susceptible `Upland' suggests that PAL activity may be involved in the PPR of common beans to S. sclerotiorum.

If the inline PDF is not rendering correctly, you can download the PDF file here.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 59 15 5
PDF Downloads 68 20 2