Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (198 KB bytes)

Title: The effects of temperature treatment on photosynthesis of pitch pine from northern and southern latitudes

Author: Ledig, F. Thomas; Clark, Joseph G.; Drew, Allen P.;

Date: 1977

Source: Botanical Gazette 138(1):7-12

Publication Series: Miscellaneous Publication

Description: Pitch pine (Pinus rigida Mill.) seedlings were grown at constant temperatures of either 21 C or 29 C. Photosynthetic temperature and light response curves were determined after 59, 107, and 153 days. Rates of Co2 uptake decreased with age, and the response to changes in light and temperature became less pronounced. Growth temperatures had no effect on the photosynthetic temperature optimum, and populations from Quebec, New Jersey, and Tennessee all had the same temperature optimum and response pattern. For the Tennessee population, growth at 21 C depressed the rate of photosynthesis at all temperatures at both 59 and 107 days, but stimulated it at 153 days. The Quebecpopulation showed no effect of premeasurement temperature at 59 or 153 days, and the New Jersey population was intermediate in this respect. Photosynthetic plasticity, defined as the difference between photosynthetic rates of seedlings grown at 21 C and those grown at 29 C, was related inversely to the degree of seasonal variation under which the populations had evolved.

Publication Notes:

  • 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.



Ledig, F. Thomas; Clark, Joseph G.; Drew, Allen P. 1977. The effects of temperature treatment on photosynthesis of pitch pine from northern and southern latitudes. Botanical Gazette 138(1):7-12


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.