MSA - Ecology/Pathology
Hamilton, C.E. , Dowling, T.E. , Faeth, S.H. .
Endophyte hybrid status alters host response to moisture and nutrient treatments.
Previous field research suggests infection of plants by hybrid fungal endophytes determines host success in stressful environments. Principal component analysis indicated hybrid fungal endophytes were more frequently associated with lower soil moisture and lower soil nutrients. We tested the effects of endophyte hybridization on host response to variable soil moisture and nutrient levels. In a greenhouse experiment hosts of different infection status (hybrid or nonhybrid) were exposed to low and high nutrient and moisture treatments. Total biomass production and plant allocation to root versus shoot biomass was significantly different in response to treatments and host infection status. Hybrid plants regardless of treatments, survived significantly better than nonhybrid infected plants. These results indicate infection status alters host response to stress and may alter host response to unique, habitat-dependent pressures.
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1 - Arizona State University, School of Life Sciences, P.O. Box 874601, Tempe, Arizona, 85287, USA
2 - University of North Carolina at Greensboro, Biology, PO Box 26170, Greensboro, NC, 27402, USA
Presentation Type: Oral Paper:Papers for Topics
Location: Cottonwood B/Snowbird Center
Date: Tuesday, July 28th, 2009
Time: 11:45 AM