| Limited response of ponderosa pine bole defenses to wounding and fungi. | |
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MedLine Citation:
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PMID: 21551357 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Tree defense against bark beetles (Curculionidae: Scolytinae) and their associated fungi generally comprises some combination of constitutive (primary) and induced (secondary) defenses. In pines, the primary constitutive defense against bark beetles consists of preformed resin stored in resin ducts. Induced defenses at the wound site (point of beetle entry) in pines may consist of an increase in resin flow and necrotic lesion formation. The quantity and quality of both induced and constitutive defenses can vary by species and season. The inducible defense response in ponderosa pine is not well understood. Our study examined the inducible defense response in ponderosa pine using traumatic mechanical wounding, and wounding with and without fungal inoculations with two different bark beetle-associated fungi (Ophiostoma minus and Grosmannia clavigera). Resin flow did not significantly increase in response to any treatment. In addition, necrotic lesion formation on the bole after fungal inoculation was minimal. Stand thinning, which has been shown to increase water availability, had no, or inconsistent, effects on inducible tree defense. Our results suggest that ponderosa pine bole defense against bark beetles and their associated fungi is primarily constitutive and not induced. |
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Authors:
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Monica L Gaylord; Richard W Hofstetter; Thomas E Kolb; Michael R Wagner |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Tree physiology Volume: 31 ISSN: 1758-4469 ISO Abbreviation: Tree Physiol. Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-05-09 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100955338 Medline TA: Tree Physiol Country: Canada |
Other Details:
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Languages: eng Pagination: 428-37 Citation Subset: IM |
Affiliation:
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School of Forestry, Northern Arizona University, Box 15018, Flagstaff, AZ 86011, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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