© 1995 Heron Publishing—Victoria, Canada
Changes in ethylene production and monoterpene concentration in slash pine and loblolly pine following inoculation with bark
beetle vectored fungi
Michael P. Popp (1, 2), Jon D. Johnson (1) and Mark S. Lesney (1)
1. Department of Forestry, University of Florida, Gainesville, FL 32611, USA / 2. Department of Opthalmology, Box 100284 JHMHC, University of Florida, Gainesville, FL 32610, USA / Received September 20, 1993
Summary
The rate of ethylene production, monoterpene concentration and size of induced lesions were determined following inoculation
of stems of slash pine (Pinus elliottii Englm. var. elliottii) and loblolly pine (Pinus taeda L.) with Ophiostoma minus (Hedgc.) H.P.Sydow, O. ips (Rumb.) Nannf or sterile water. In a second experiment, the rate of ethylene production and monoterpene concentration were
determined following inoculation of slash pine stems with O. minus, O. nigrocarpa (Davids.) DeHoog (a nonpathogen) or sterile water. Fungal inoculation significantly increased the rate of ethylene production
compared with that of stems inoculated with sterile water. Greater rates of ethylene production were associated with greater
fungal virulence. Changes in monoterpene concentration generally mimicked changes in the rate of ethylene production, i.e.,
high monoterpene concentrations were associated with high rates of ethylene production.
Keywords:
Ophiostoma, Pinus elliottii, Pinus taeda.
