title: Composition of the aliphatic components of suberin of the endodermal fraction from the first internode of etiolated sorghum seedlings.
abstract: 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.
authors: Department of Agricultural Chemistry and Program in Biochemistry and Biophysics, Washington State University, Pullman, Washington 99164.
authors: K E
authors: KE
authors: Espelie
authors: P E
authors: PE
authors: Kolattukudy