Abstract
Abstract Seedling apple trees of the ‘Rome Beauty’ variety were treated with 20 ppm abscisic acid and 100 ppm gibberellic acid and compared with controls during predormancy and dormancy for killing point, soluble protein and content of specific amino acids. Amino acid and soluble protein content were statistically correlated with killing point. A relationship exists between cold hardiness and certain amino acids. Soluble protein content was correlated with killing point in the gibberellic acid and control treatments. Treatment with abscisic acid showed no correlation between soluble protein and killing point indicating that soluble protein may not be an index of hardiness in apple trees.
Published Version
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