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    Ethylene Production By Different Age Class Ponderosa and Jeffery Pine Needles as Related to Ozone Exposure and Visible Injury

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    Author
    Telewski, Frank W.
    Affiliation
    Laboratory of Tree-Ring Research, University of Arizona
    Issue Date
    1992
    Keywords
    Ethylene production
    Ozone
    Pinus jeffreyi
    Pinus ponderosa
    
    Metadata
    Show full item record
    Citation
    Telewski, Frank W. "Ethylene production by different age class ponderosa and Jeffery pine needles as related to ozone exposure and visible injury." Trees. Volume 6 Issue 4, pp. 195-198.
    Publisher
    Springer-Verlag
    Description
    Author's manuscript for published article. See Additional Links field for link to published version.
    URI
    http://hdl.handle.net/10150/303765
    Additional Links
    http://dx.doi.org/10.1007/BF00224335
    Abstract
    Ethylene production by different needle age classes was characterized using a mercuric perchlorate traps in natural populations of two ponderosa pine varieties (Pinus ponderosa var. arizonica [Engelm] Shaw and var. ponderosa Dougl. ex Laws.) and Jeffery pine (Pinus leffrevi Grev. and Balf.). All ozone -exposed populations contained individuals which were symptomatic and asymptomatic with respect to visible ozone injury. Ethylene production of different needle age classes was also characterized in Pinus ponderosa var. ponderosa seedlings grown in open top ozone fumigation chambers. Older age class needles produce more ethylene than younger age class needles. Needles of both P. ponderosa var. ponderosa and P. jeffreyi exhibiting ozone injury in the field produced significantly (p >0.05) higher levels of ethylene than asymptomatic conspecifics. Seedlings exposed to highest treatment level of ozone in the fumigation study produced the highest levels of ethylene followed by fumigation with medium and low ozone concentrations and carbon filtered air. These data indicate that measurement of ethylene in conifer needles as a measure of stress needs to be calibrated for needle age class. It also suggests that the sensitivity of a tree to ozone injury may be regulated by the inherent ability of the individual to produce ethylene.
    Type
    Article
    Language
    en_US
    Sponsors
    Supported by Cooperative Agreement Work Order #8020-1-0002 from the Air Quality Division, National Park Service, U.S. Department of the Interior.
    Collections
    Natural History Reports

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