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Winter season corticular photosynthesis in Cornus florida, Acer rubrum, Quercus alba, and Liriodendron tulipifera

Journal Article · · For. Sci.; (United States)
OSTI ID:6867154
 [1];
  1. Centre Coll. of Kentucky, Danville
+ Show Author Affiliations

Winter season corticular photosynthesis was studied in four species of deciduous trees: dogwood (Cornus florida), red maple (Acer rubrum), white oak (Quercus alba), and yellow-poplar (Liriodendron tulipifera). Techniques included measuring CO/sub 2/ uptake at varying light intensities, relating the apparent photosynthetic capacities to seasonal changes in chlorophyll content of twigs and determining the fate of assimilated carbon over time. Dogwood was the most photosynthetically active of the four species studied; however, gross photosynthesis did not exceed respiration in any of the four species. Photosynthetic activity of dogwood twigs was estimated at 10% of that of dogwood leaves on a weight basis and 85% on a surface area basis. Photosynthetic activity was generally related to shade tolerance ranking and was on the order of dogwood much greater than red maple much greater than white oak approx. = yellow-poplar. Little change in chlorophyll content occurred over the January-April 1979 study interval.

Research Organization:
Oak Ridge National Lab., TN
DOE Contract Number:
W-7405-ENG-26
OSTI ID:
6867154
Journal Information:
For. Sci.; (United States), Journal Name: For. Sci.; (United States) Vol. 26:4; ISSN FOSCA
Country of Publication:
United States
Language:
English

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Related Subjects

510100 -- Environment
Terrestrial-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
551001* -- Physiological Systems-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLOROPHYLL
DATA
DOSE-RESPONSE RELATIONSHIPS
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MAPLES
NUMERICAL DATA
OAKS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHYTOCHROMES
PIGMENTS
PLANTS
POPLARS
PORPHYRINS
RADIATIONS
RESPIRATION
SEASONS
SYNTHESIS
TRACER TECHNIQUES
TREES
UPTAKE
VISIBLE RADIATION