Systemic effects of Heterobasidion annosum on ferulic acid glucoside and lignin of presymptomatic ponderosa pine phloem, and potential effects on bark-beetle-associated fungi

Concentrations of soluble phenolics and lignin in the phloem of ponderosa pines inoculated with the pathogen Heterobasidion annosum were assessed over a period of 2 years in a 35-year-old plantation in northern California, USA. The major effect of the pathogen on phloem-soluble phenolics consisted o...

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Bibliographic Details
Published in:Journal of chemical ecology 2003-05, Vol.29 (5), p.1167-1182
Main Authors: BONELLO, Pierluigi, STORER, Andrew J, GORDON, Thomas R, WOOD, David L, HELLER, Werner
Format: Article
Language:English
Subjects:
Acids
Adaptation, Physiological
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Bark
Basidiomycota - pathogenicity
Biological and medical sciences
Coleoptera - microbiology
Coleoptera - pathogenicity
Coumaric Acids - analysis
Feeding Behavior
Flowers & plants
Fundamental and applied biological sciences. Psychology
Fungi
Glucosides - analysis
Lignin - analysis
Pathogens
Phenology
Phenols
Pine trees
Pinus - chemistry
Pinus - microbiology
Plants and fungi
Population Dynamics
Trees
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Summary:Concentrations of soluble phenolics and lignin in the phloem of ponderosa pines inoculated with the pathogen Heterobasidion annosum were assessed over a period of 2 years in a 35-year-old plantation in northern California, USA. The major effect of the pathogen on phloem-soluble phenolics consisted of a significant accumulation of ferulic acid glucoside: 503 +/- 27 microg/g fresh weight (FW), compared with 366 +/- 26 microg/g FW for mock-treated and 386 +/- 27 microg/g FW for control trees. Lignin content was negatively correlated with ferulic acid glucoside concentration, and there was an indication of lignin reduction in the cell walls of inoculated trees. Lignin had a negative effect on the in vitro growth of two common bark beetle fungal associates. Ceratocystiopsis brevicomi and Ophiostoma minus. For this reason it, is hypothesized that lower lignification may facilitate the growth of beetle-associated fungi, resulting in greater susceptibility of the presymptomatic host to bark beetle colonization.
ISSN:0098-0331
1573-1561
DOI:10.1023/A:1023833707382