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Article
Carbon isotope ratios of amylose, amylopectin and mutant starches
Phytochemistry
  • M. Paul Scott, United States Department of Agriculture
  • Jay-Lin Jane, Iowa State University
  • Madhavan Soundararajan, University of Nebraska - Lincoln
Document Type
Article
Publication Version
Published Version
Publication Date
10-1-1999
DOI
10.1016/S0031-9422(99)00271-X
Abstract
Carbon isotope ratios (expressed as δ13C values) were determined for various sources of starch and the starch fractions amylose and amylopectin. The δ13C values of amylose were consistently less negative, 0.4–2.3 ‰, than those of amylopectin in kernal starch from maize (Zea mays) and barley (Hordeum vulgare) and in tuber starch from potato (Solanum tuberosum). Kernel starch isolated from the maize mutants wx1 and ae1, with known genetic lesions in the starch biosynthetic pathway, also showed significant differences in δ13C values. Collectively, these results suggest that variation in carbon isotope ratios in the amylose and amylopectin components of starch may be attributed to isotopic discrimination by the enzymes involved in starch biosynthesis.
Comments

This article is published as Scott, M. Paul, Jay-Lin Jane, and Madhavan Soundararajan. "Carbon isotope ratios of amylose, amylopectin and mutant starches." Phytochemistry 52, no. 4 (1999): 555-559, doi: 10.1016/S0031-9422(99)00271-X.

Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Citation Information
M. Paul Scott, Jay-Lin Jane and Madhavan Soundararajan. "Carbon isotope ratios of amylose, amylopectin and mutant starches" Phytochemistry Vol. 52 Iss. 4 (1999) p. 555 - 559
Available at: http://works.bepress.com/paul-scott/57/