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Effects of Sulphur Dioxide on Sugar and Free Amino Acid Content of Pine Seedlings
Author(s) -
MALHOTRA S. S.,
SARKAR S. K.
Publication year - 1979
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1979.tb06517.x
Subject(s) - valine , alanine , isoleucine , aspartic acid , chemistry , glycine , amino acid , sugar , leucine , threonine , arginine , lysine , glutamic acid , food science , biochemistry , methionine , sulfur dioxide , serine , organic chemistry , enzyme
Treatment of jack pine ( Pinus banksiana Lamb.) seedlings with gaseous SO 2 resulted in a shift between the reducing and non‐reducing sugars. Increasing concentrations of gaseous SO 2 caused an increase in reducing sugars and a decline in the non‐reducing sugars, suggesting a conversion from the latter to the former at high SO 2 concentrations. The total amino acid content of the intact tissues also increased with increasing concentrations of gaseous SO 2 . Gas‐liquid chromatographic analyses of the amino acids indicated that SO 2 (1. 34 mg · m ‐3 for 96 h) resulted in an increase in the content of alanine, valine, glycine, isoleucine, leucine, threonine, aspartic acid tyrosine, lysine, and arginine, and a decrease in the content of serine and glutamic acid. The enzymatic and other implications of such changes are discussed.