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Amino nitrogen and phenolic constituents of bark of American beech, Fagus grandifolia, and infestation by beech scale, Cryptococcus fagisuga
Author(s) -
Wargo Ph. M.
Publication year - 1988
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1988.tb00215.x
Subject(s) - beech , bark (sound) , biology , infestation , botany , aromatic amino acids , horticulture , amino acid , fagus orientalis , biochemistry , ecology
Concentrations of amino acids, total amino nitrogen, and phenols, ratio of phenol to amino nitrogen, and pH in the bark of American beech, Fagus grandifolia , were determined to see if these chemical constituents were correlated with susceptibility of trees to infestation by the beech scale, Cryptococcus fagisuga . The relationship of these bark constituents with scale infestation levels (none, light, and moderate), tree size (large vs. small trees), and bark shading was determined. Levels of some individual amino acids and total amino acid content in moderately infested trees were significantly higher than in uninfested trees. Large uninfested beech trees, which tend to be more readily infested by scale, had significantly higher concentrations of aspartic acid. Concentrations of phenol in the outer bark of both infested and uninfested trees were significantly higher than in the inner bark. However in bark infected by Nectria , phenol levels in the inner bark were significantly higher than in the outer bark.