Skip to main content

Seasonal Changes of Tissue-Water Relations in Shoots and Root Systems of Douglas-fir Seedlings

Buy Article:

$29.50 plus tax (Refund Policy)


Values of bulk osmotic potential at full turgor (o), water potential at which the bulk turgor pressure first reaches zero (z) and maximum bulk elastic modulus (max) were monitored monthly for 13 months in the shoot and root systems of 2- to 3-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings using the pressure-volume method. In shoots, o and z went through two maxima and minima throughout the year; the minima for o and z were - 2.3 and - 3.8 MPa, respectively, in midwinter and - 2.5 and - 3.5 MPa, respectively, in midsummer. max was lowest (elasticity highest) in April (5.0 MPa) and highest in September (17.0 MPa). In root systems o was nearly constant at - 1.0 MPa all year, while z dropped to a minimum annual value of -3.0 MPa in July and reached maxima (-2.0 MPa) in March and September. Turgor maintenance capacity changed seasonally due to changes in o (osmotic adjustment). Dynamics of these and other tissue water relations properties are discussed in relation to phenological developmental stages, frost hardiness, and drought tolerance. Forest Sci. 30:538-548.

Keywords: Osmotic potential; osmotic adjustment; pressure-volume curves; tissue elasticity; turgor maintenance

Document Type: Journal Article

Affiliations: Forestry Research Associate, Forest Research Institute, Private Bag, Rotorua, New Zealand

Publication date: June 1, 1984

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more