Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Journal Article

The Water Relations of Thuja occidentalis L. from Two Sites of Contrasting Moisture Availability

Donald E. Collier and Michael G. Boyer
Botanical Gazette
Vol. 150, No. 4 (Dec., 1989), pp. 445-448
Stable URL: http://www.jstor.org/stable/2995444
Page Count: 4

You can always find the topics here!

Topics: Seedlings, Plants, Xylem, Dehydration, Water pressure, Highlands, Soil water, Pressure, Lowlands, Floodplains
Were these topics helpful?
See somethings inaccurate? Let us know!

Select the topics that are inaccurate.

Cancel
  • Read Online (Free)
  • Download ($19.00)
  • Subscribe ($19.50)
  • Add to My Lists
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Water Relations of Thuja occidentalis L. from Two Sites of Contrasting Moisture Availability
Preview not available

Abstract

Tissue water relations of Thuja occidentalis representing natural populations from two different moisture habitats were analyzed from pressure-volume curves. Xylem water potential, osmotic potential, and the water potential at incipient plasmolysis of mature trees in the field were more negative in dry upland populations than in wet lowland populations. Analyses of seedlings grown from seed collected at each site, and grown in both wet and dry conditions, indicated that the site of seed origin did not affect the water relations of these seedlings. Seedlings grown under xeric conditions, however, developed a more negative water potential, osmotic potential, and water potential at incipient plasmolysis than did seedlings grown under wet conditions. The ability of T. occidentalis seedlings to acclimate as a response to variations in moisture availability, rather than ecotypic differences, probably plays an important role in allowing growth in both wet and dry sites.

Page Thumbnails

  • Thumbnail: Page 
445
    445
  • Thumbnail: Page 
446
    446
  • Thumbnail: Page 
447
    447
  • Thumbnail: Page 
448
    448