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United States Department of Agriculture

Agricultural Research Service

Research Project: LIVESTOCK LOSSES FROM ABORTIFACIENT AND TERATOGENIC PLANTS

Location: Poisonous Plant Research

Title: Differences in ponderosa pine isocupressic acid concentrations across space and time)

Author
item Cook, Daniel
item Gardner, Dale
item Pfister, James - Jim
item Panter, Kip
item Stegelmeier, Bryan
item Lee, Stephen
item Welch, Kevin
item Green, Benedict - Ben
item Davis, Thomas - Zane

Submitted to: Rangelands
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/27/2010
Publication Date: 4/1/2010
Citation: Cook, D., Gardner, D.R., Pfister, J.A., Panter, K.E., Stegelmeier, B.L., Lee, S.T., Welch, K.D., Green, B.T., Davis, T.Z. 2010. Differences in ponderosa pine isocupressic acid concentrations across space and time. Rangelands. 32(2):14-7.

Interpretive Summary: Ponderosa Pine (Pinus ponderosa) is distributed throughout the western half of North America, where it is the most widely adapted and ubiquitous conifer. Ponderosa Pine contains isocupressic acid, a diterpene acid, which has been shown to be responsible for its abortifacient activity. A sampling protocol for Ponderosa Pine needles was established. ICA concentrations were shown to vary between locations and between months at some locations.

Technical Abstract: Ponderosa Pine (Pinus ponderosa) is distributed throughout the western half of North America, where it is the most widely adapted and ubiquitous conifer. Ponderosa Pine contains isocupressic acid, a diterpene acid, which has been shown to be responsible for its abortifacient activity. The objective of this study was to establish a sampling protocol for pine needles and to determine if ICA concentrations change as a function of the environment or if there is location-to-location variation in ICA content. These results indicate that the concentration of ICA in pine needles is not uniform throughout an individual tree. Consequently collecting a composite sample from a tree is most representative of a tree’s ICA content. Furthermore, the data shows that ICA concentrations can vary between locations and between months at some locations.

Last Modified: 8/24/2016
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