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    Author(s): M. Thompson Conkle
    Date: 1971
    Source: Forest Science Vol. 17(4): p. 494-498
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (315 KB)


    Five enzyme classes from 11 developmental stages of germinating embryos were separated by starch gel electrophoresis. Alcohol dehydrogenase isozymes found in embryos of dry seed were most active at the time of radicle emergence; activity decreased thereafter, fading below the level of detection when seed coats were shed. Peroxidase isozymes were absent and esterase isozymes were nearly absent from stratified seed, but both increased steadily in number and stainability from time of radicle emergence through epicotyl elongation. Leucine aminopeptidase and catalase isozymes were detectable in all growth stages. In later stages, esterases and leucine aminopeptidases were found primarily in seedling tops, and many catalase and peroxidase isozymes differed between roots and tops. Both the developmental stage of the plant and the tissue assayed determine the presence of specific isozymes.

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    Conkle, M. Thompson. 1971. Isozvme specificity during germination and early growth of knobcone pine. Forest Science Vol. 17(4): p. 494-498


    Pinus attelluata Lemm., seed. alcohol dehydrogenase, leucine aminopeptidase, esterase, peroxidase, catalase

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