Rates of Ethylene Production by Parenchyma Cells in Black Walnut Sapwood

J. E. Phelps, N. D. Nelson, W. J. Rietveld, E. A. McGinnes


Black walnut sapwood samples, representing high and low extremes in ethylene production rates, were anatomically analyzed to determine the relation between the amount of parenchyma in the sapwood and the rate of ethylene production. These analyses indicated that ethylene production in sapwood is controlled not by the amounts of parenchyma, but by the rate of ethylene production within each sapwood parenchyma cell.


Juglans nigra L.;ethylene;heartwood formation;wood anatomy;sapwood;parenchyma;hormones

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