Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): N.E. GrulkeH.K. Preisler; C. Rose; J. Kirsch; L. Balduman
    Date: 2002
    Source: New Phytologist. 154: 621-631.
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (451.0 KB)

    Description

    • The effect of O3 exposure or uptake on carbon acquisition (net assimilation (A) or gross photosynthesis (Pg)), with and without drought stress, is reported here in 40-yr-old-ponderosa pine (Pinus ponderosa) trees.
    • Maximum daily gas exchange was measured monthly for 12 trees at four sites differing in pollutant exposure over two growing seasons with above- and below-average annual precipitation. Gas exchange measures were estimated between sampling periods using a generalized additive regression model.
    • Both A and Pg generally declined with cumulative O3 exposure or uptake at all sites. As a response variable, Pg was slightly more sensitive than A to cumulative O3 exposure. As a metric, O3 uptake vs exposure permitted slightly better statistical resolution of seasonal response between sites.
    • The effect of late summer drought stress was statistically significant only at the moderate pollution site, and combined synergistically with O3 exposure or uptake to reduce Pg. The general additive model allows the user to define a deleterious level of cumulative O3 exposure or uptake, and to quantitatively assess biological response.

    Publication Notes

    • You may send email to pnw_pnwpubs@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Grulke, N.E.; Preisler, H.K.; Rose, C.; Kirsch, J.; Balduman, L. 2002. O3 uptake and drought stress effects on carbon acquisition of ponderosa pine in natural stands. New Phytologist. 154: 621-631.

    Keywords

    Pinus ponderosa (ponderosa pine), ozone (O3) uptake, pollution effects, assimilation, photosynthesis, drought stress.

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/53850