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 (371 KB)

Title: Autumnal photosynthesis in short-rotation intensively cultured Populus clones

Author: Nelson, N.D.; Dickmann, D.I.; Gottschalk, K.W.;

Date: 1982

Source: Photosynthetica. 16(3): 321-333.

Publication Series: Scientific Journal (JRNL)

Description: Many exotic hybrid Populus clones grown under short-rotation intensive culture (SRIC) in the Lake States region of the U.S.A. retain green leaves in the autumn for 2-6 weeks after native aspen (P. tremuloides and P. grandidentata) have lost their leaves. Leaves on the terminal shoots of five such clones tested in southern Michigan and northern Wisconsin had substantial leaf conductances to C02 and photosynthetic rates (PG) during this late-season period of leaf retention. PG was high enough to suggest that autumn retention of green leaves may be an important factor contributing to the rapid growth of poplars under SRIC in this cold northern temperate area. Leaf conductances and PG declined gradually before the first hard frosts of the autumn in the northern Wisconsin experiment, indicating normal autumn leaf aging and senescence, but did not change appreciably in the southern Michigan experiment until the first hard frosts. The first hard frosts reduced PG and leaf conductance in most of the clones, dramatically in the northern Wisconsin experiment. Leaf conductances and PG in two of the clones in the southern Michigan experiment were reduced only moderately by the first hard frosts. Leaf conductance and PG exhibited generally parallel seasonal trends in both experiments.

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.
  • This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
  • Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, if you notice any errors which make this publication unusable.



Nelson, N.D.; Dickmann, D.I.; Gottschalk, K.W. 1982. Autumnal photosynthesis in short-rotation intensively cultured Populus clones. Photosynthetica. 16(3): 321-333.


 [ 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.