Graduate Thesis Or Dissertation
 

Stress response as a basis for disease susceptibility in Ponderosa Pine

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/6w924f12c

Descriptions

Attribute NameValues
Creator
Abstract
  • Trees stressed by artificial and natural means were sampled for response in growth and vigor, carbohydrate content, resin pressure characteristics, and water relations. Tree response was found to reflect both the severity and type of stress imposed. Crown color and appearance were reliable indicators of prolonged stress and advanced decline of the host. Growth, measured by leader and needle lengths, was a sensitive indicator of stress in young trees. Trees in three root rot severity classes ranging over healthy, infected, and advanced disease were sampled for oleoresin exudation pressure. They averaged 6, 4, and 2 atmospheres pressure respectively. Trees with 4 atmospheres were beginning to decline and became attractive to bark beetles at one atmosphere. Responses in water relations and starch content of wood were inconclusive. The effects of drought and stand stagnation enhanced results in some sample trees.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Digitization Specifications
  • Master files scanned at 600 ppi (256 Grayscale, 24-bit Color) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B&W, 24-bit Color), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Relationships

Parents:

This work has no parents.

In Collection:

Items