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    Author(s): Robert R. Ziemer
    Date: 1971
    Source: Canadian Journal of Botany 49(1): 167-171.
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (191 KB)


    The movement of 14-C from the old needles to the roots, and later to the new needles, was measured in 2-year-old ponderosa pine seedlings. The seedlings were in one of three growth stages at the time of the feeding of 14-CO-2: 9 days before spring bud break with no root activity; 7 days before spring bud break with high root activity; and 7 days after spring bud break with moderate root activity. The form of the curves of count rate plotted against time are similar for a given plant part

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    Ziemer, Robert R. 1971. Translocation of 14-C in ponderosa pine seedlings. Canadian Journal of Botany 49(1): 167-171.


    PSW4351, ponderosa pine seedlings, translocation of photosynthate

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