Comparison of fatty acid composition in tissues of low linolenate mutants of soybean

X. M. Wang, F. A. Norman, J. B. St. John, T. Yin, D. F. Hildebrand

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Phosphatidylcholine and monogalactosyldiacylglycerol are the proposed substrates for fatty acid desaturation to form linolenic acid (18:3) in plant tissues. A comparative analysis of the compositions of PC and MGDG molecular species, together with determination of total fatty acids, was conducted in the soybean cv. Century and in C1640, a low 18:3 mutant, to evaluate the expression of this mutation in the two classes of lipids among various tissues. Seeds of C1640 and A5, another low 18:3 mutant, had decreased 18:3 levels in cotyledons and axes but not in seed coats. Vegetative tissues of C1640 and A5 had lower 18:3 levels in roots but not in leaves and stems. The amount (mo1%) of 16:0/18:3 and 18:3/18:3 PC species in cotyledons and 18:3-containing PC species in axes, decreased in C1640 compared to Century. The reduction of 16:0/18:3 and 18:3/18:3 species in both PC and MGDG also occurred in roots but little alteration existed in leaves and stems of C1640. The present results suggest the existence of a possible common mechanism for the formation of 18:3 in roots and seeds which is different from leaves and stems.

Original languageEnglish
Pages (from-to)411-414
Number of pages4
Issue number2
StatePublished - 1989

Bibliographical note

Funding Information:
Acknowledgements-~~Thwiso rk was supported by the American Soybean Association. We are grateful to Dr J. Wilcox and Dr Fehr for supplying us with Cl640 and A5 seeds,r espectively.


  • Glycine max
  • Leguminosae
  • fatty acids
  • linolenic acid
  • lipid desaturation.
  • mutants

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Plant Science
  • Horticulture


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