Genotypic Variation in Carbon Isotope Discrimination in Mature Ponderosa Pine TreesEntry ID: USDA0562
Abstract: Data in "Genotypic Variation in Carbon Isotope Discrimination in
Mature Ponderosa Pine Trees" consists of measurements of xylem
water potential, soil moisture, gas exchange and carbon isotope
discrimination of mature ponderosa pines at three locations in
Nebraska. The objective of this
research is to determine the usefulness of carbon isotope
discrimination as a selection criteria to improve ... water-use
efficiency in forest and conservation trees.
Collection Organization: University of Nebraska
Collection Methodology: This study examines genotypic and
environmental variation in carbon isotope discrimination in
mature ponderosa pine trees from diverse geographic sources
planted in three provenance tests in Nebraska. Physiological
investigation conducted on trees from diverse
physiographic sources at the three sites. Gas exchange and
water relations measured on 25-year-old trees from twelve
sources. The sources selected to represent a range of
physiographic conditions while minimizing latitudinal and
photoperiod effects. Net photosynthetic and stomatal response
to water stress compared for each source and location. Water-use
efficiency compared from seasonal gas exchanges and carbon
isotope discrimination of needles and cellulose from wood cores.
Collection Frequency: Four times annually.
Update Characteristics: N/A
Data Center: USDA Forest Service
Dissemination Media: PC diskette
File Format: ASCII text, Quattro Pro, SAS
Access Instructions: Contact the data center.
Access Restrictions: None
Start Date: 1995-05-01Stop Date: 1996-07-31
AGRICULTURE > AGRICULTURAL PLANT SCIENCE > PLANT BREEDING AND GENETICS
AGRICULTURE > FOREST SCIENCE
AGRICULTURE > SOILS
BIOSPHERE > VEGETATION > CARBON
BIOSPHERE > VEGETATION > LEAF CHARACTERISTICS
BIOSPHERE > VEGETATION > PLANT CHARACTERISTICS
HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS
LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
BIOLOGICAL CLASSIFICATION > PLANTS > GYMNOSPERMS > CONIFERS
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PHOTOSYNTHESIS
Quality Data analyzed for outliers. Key-punched data verified against
field hard copies.
Union Camp Corporation 1720 Goza Road
Province or State: SC
Postal Code: 29104
Role: TECHNICAL CONTACT
Email: jz at unlinfo.unl.edu
USDA Forest Service University of Nebraska Forestry Science Lab
Province or State: NE
Postal Code: 68583-0822
Zhang, J.W. and Cregg, B.M. 1996. Genetic variation in carbon
isotope discrimination of ponderosa pine (Pinus ponderosa Dougl.
ex Laws.) populations grown in diverse environments. In: Forest
Management Impacts on Ecosystem Processes, Proc. 14th North
American Forest Biology Workshop, Quebec City, Canada. p. 36.
Zhang, J.W. and Cregg, B.M. 1996. Variation in stable isotope
discrimination among and within exotic conifer species grown in
eastern Nebraska, USA. Forest Ecology and Management 83:181-187.
Zhang, J.W., Feng, Z., Cregg, B.M., and Schumann, C.M. (in
press). Carbon isotope composition, gas exchange, and growth of
three populations of ponderosa pine differing in drought
tolerance. Tree Physiology.
Creation and Review Dates
Last DIF Revision Date: 2005-08-09