Graduate Thesis Or Dissertation
 

Response of annual growth ring components to soil moisture deficit in young plantation grown Douglas-fir in coastal British Columbia

Öffentlich Deposited

Herunterladbarer Inhalt

PDF Herunterladen
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/t435gh13p

Descriptions

Attribute NameValues
Creator
Abstract
  • The goal of this study was to determine whether annual growth ring variables of young coastal Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb.] Franco.) growing in progeny tests are sensitive to availability of soil moisture during the growing season. If ring variables are found to respond to soil moisture deficit (SMD) in consistent and predictable ways, they might prove useful for screening genotypes for drought hardiness in breeding programs. Increment cores were collected from 16(18-19 year-old) trees on each of eight progeny test sites in coastal British Columbia. X-ray densitometry was used to measure eight variables (earlywood and latewood width and density, latewood proportion, maximum density, latewood mass, and total ring mass) on eleven annual growth rings (years 1985-95) of each core. Regression analyses revealed that all ring variables are strongly influenced by ring distance from the pith (age trends). In addition, after accounting for age-trends, all ring variables were significantly associated with SMD, although the associations were often complex (i.e., involving second and third order polynomials of SMD) and differed significantly across sites. Linear trends in four ring variables (latewood density, proportion, and width; and total ring mass), with increasing SMD, were as expected and were consistent across sites; and thus, show promise in screening for drought hardiness. The remaining ring variables showed inconsistent associations with SMD across sites. A small companion study on cell morphology suggested that latewood cells increase in density with increasing SMD due to decreased cell lumen diameter, and not because of increased cell wall thickness.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Urheberrechts-Erklärung
Publisher
Language
Digitization Specifications
  • PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Beziehungen

Parents:

This work has no parents.

In Collection:

Artikel

Miniaturansicht Titel Hochladedatum Sichtbarkeit Aktionen
file details Bower_Andrew_1998.pdf 2017-08-14 Öffentlich Herunterladen