Photosynthetic capacity of red spruce during winter

Paul Schaberg; J.B. Shane; P.F. Cali; J.R. Donnelly; G.R. Strimbeck

Treesearch

Photosynthetic capacity of red spruce during winter

Informally Refereed

Authors:

Paul Schaberg, J.B. Shane, P.F. Cali, J.R. Donnelly, G.R. Strimbeck

Year:

1998

Type:

Scientific Journal

Station:

Northern Research Station

Source:

Tree Physiology. 18. 271-276.

Download (PDF 210 KB)

Download (PDF 210 KB): https://research.fs.usda.gov/download/treesearch/15595.pdf

Abstract

We measured the photosynthetic capacity (P_max) of plantation-grown red spruce (Picea rubens Sarg.) during two winter seasons (1993-94 and 1994-95) and monitored field photosynthesis of these trees during one winter (1993-94). We also measured P_max for mature montane trees from January through May 1995. Changes in P_max and field photosynthesis closely paralleled seasonal changes in outdoor air temperature. However, during thaw periods, field photosynthesis was closely correlated with multiple-day temperature regimes, whereas P_max was closely correlated with single-day fluctuations in temperature.

Keywords

photosynthesis, Picea rubens, temperature, winter thaw

Citation

Schaberg, P.G.; Shane, J.B.; Cali, P.F.; Donnelly, J.R.; Strimbeck, G.R. 1998. Photosynthetic capacity of red spruce during winter. Tree Physiology. 18. 271-276.