Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 63:433-435 (1979)
© 1979 American Society of Plant Biologists

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Articles

Composition of the Aliphatic Components of Suberin of the Endodermal Fraction from the First Internode of Etiolated Sorghum Seedlings 1

Karl E. Espelie and P. E. Kolattukudy

a Department of Agricultural Chemistry and Program in Biochemistry and Biophysics, Washington State University, Pullman, Washington 99164

The stems from etiolated seedlings of Sorghum bicolor were separated into epidermal and endodermal fractions by manually removing the stele from the cortex. The epidermal fraction was shown to contain a lipid polymer whose monomeric composition was characteristic of cutin with dihydroxyhexadecanoic acid as a major component (25%). The endodermal fraction contained a lipid polymer whose monomeric composition was characteristic of suberin: hexadecanoic acid 12%, octadecenol 6%, octadecenoic acid 23%, {omega}-hydroxyhexadecanoic acid 17%, hexadecanedioc acid 8%, {omega}-hydroxyoctadecenoic acid 8%, and octadecenedioic acid 12%. This endodermal polymer is thought to be the suberin component of the Casparian band.

1 This work was supported in part by National Science Foundation Grant PCM 77-00927. Scientific Paper 5163, Project 2001, College of Agriculture Research Center, Washington State University, Pullman, Washington 99164.




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F. Beisson, Y. Li, G. Bonaventure, M. Pollard, and J. B. Ohlrogge
The Acyltransferase GPAT5 Is Required for the Synthesis of Suberin in Seed Coat and Root of Arabidopsis
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P. E. Kolattukudy
Biopolyester Membranes of Plants: Cutin and Suberin
Science, May 30, 1980; 208(4447): 990 - 1000.
[Abstract] [PDF]


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