Genetic control of sterol esterification in developing wheat endosperm

Torres, V. and García Olmedo, Francisco (1975). Genetic control of sterol esterification in developing wheat endosperm. "Biochimica et Biophysica Acta", v. 409 (n. 3); pp. 367-375. ISSN 005-2760. https://doi.org/10.1016/0005-2760(75)90032-6.

Description

Title: Genetic control of sterol esterification in developing wheat endosperm
Author/s:
  • Torres, V.
  • García Olmedo, Francisco
Item Type: Article
Título de Revista/Publicación: Biochimica et Biophysica Acta
Date: December 1975
ISSN: 005-2760
Volume: 409
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

1. 1. The action of gene Pln, previously characterized by the sterol ester patterns of mature whole wheat kernels, has been found to be restricted to the endosperm and not to affect the embryo, the pericarp or the seed coat. 2. 2. The dominant allele Pln, which determines a sterol ester pattern with palmitate as the main ester, is also responsible for a low level of free sterol at maturity. A high level of free sterol is associated with the recessive allele pln, which determines an ester pattern with linoleate as the main ester. 3. 3. Divergence between the two phenotypes starts at about 21 days after anthesis, when cell proliferation has been completed, the aleurone layer has differentiated, and only cell enlargement is taking place. A marked increase in esterification, mainly by palmitate, which is controlled by the dominant allele, is concomitant with a sharp decrease in free sterol. 4. 4. The increased net esterification is non-specific with respect to 4-demethyl sterols, because it affects the four main ones, namely sitosterol, stigmasterol, campesterol and cholestero

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