Chemical Comparison of Two Ecotypes of Loblolly Pine (<i>Pinus Taeda</i> L.)


  • T. J. Elder
  • L. F. Burkart


Loblolly pine, Bastrop pine, drought resistance, chemical composition


Loblolly pine from the continuous range in east Texas was compared with an apparently drought-resistant ecotype, the so-called "Lost pines" or "Bastrop pines." The Bastrop pines are found in a small area of central Texas isolated from the rest of the loblolly range, and in a region receiving considerably less rainfall. Determinations made were: holocellulose, alpha cellulose, ash, specific gravity, and percentages of earlywood and latewood. Nutrient analyses for levels of sodium, potassium, calcium, magnesium, zinc, manganese, and copper were also performed. It was found that the earlywood of the east Texas population had significantly greater levels of holocellulose and alpha cellulose. Regression analyses were performed relating the nutrient values to the chemical components. The appearance of potassium and magnesium in these equations, for the Bastrop pines, may indicate physiological adaptation to the more xeric environment.


Bilan, M. V., C. T. Hogan, and H. Brooks Carter. 1977. Stomatal openings, transpiration, and needle moisture in loblolly pine seedlings from two Texas seed sources. For. Sci.23(4):457-462.nBurkart, L. F. 1963. The cooking process IXV. The action of aqueous solutions of pure sodium hydrosulfide on aspen wood. Doctoral dissertation, University of Minnesota.nDavies, G. 1973. Response of loblolly pine seedlings from two seed sources to favorable and unfavorable moisture regimes. Unpublished Master's thesis, Stephen F. Austin State University. 76 pp.nFischer, R. A. 1968. Stomatal opening: Role of potassium uptake by guard cells. Science160:784-785.nGilmore, A. R. 1956. Physical and chemical characteristics of loblolly pine seedlings associated with drought resistance. Proceedings Fourth Southern Conference on Forest Tree Improvement.nHaugen, R. M. 1972. Effect of some environmental factors on the stomatal reaction of loblolly pine seedlings from two seed sources. Unpublished Master's thesis, Stephen F. Austin State University. 53 pp.nJayme, G. 1942. Preparation of holocellulose and celluloses with sodium chlorite. Cellulosechem.20:43-49.nKnauf, T. A., and M. V. Bilan. 1974. Needle variation in loblolly pine from mesic and xeric sources. For. Sci.20(1):88-90.nSmith, D. M. 1954. Maximum moisture content for determining specific gravity of small wood samples. Forest Products Laboratory Report No. 2014.nvan Buijtenen, J. P. 1963. Testing loblolly pines for drought resistance. Texas Forest Service Technical Report No. 13.nWise, L. E. 1945. Quantitative isolation of hemicelluloses from coniferous wood. Industrial and Engineering Chemistry Analytical Edition17(1):63-64.nWise, L. E., M. Murphy, and A. D. D'Addieco. 1946. Chlorite holocellulose—its fractionation and bearing on summative wood analysis and on studies on the hemicelluloses. Paper Trade J.122: 35-43.nZobel, B. J. 1955. Drought hardy tests of loblolly pine in proceedings of the third southern conference of forest tree improvement. Pp. 42-44. USDA Forest Service, Southern Forest Experiment Station, New Orleans, Louisiana 132 pp.nZobel, B. J., and R. E. Goddard. 1955. Preliminary results on tests of drought hardy strains of loblolly pine (Pinus taeda L.). Texas Forest Service. Research Note No. 14. 22 pp.n






Research Contributions