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Genetic control of sterol esterification in developing wheat endosperm.

J V Torres, F Garcia-Olmedo

Biochimica Et Biophysica Acta

|December 17, 1975

Summary

This summary is machine-generated.

The gene Pln in wheat controls sterol ester patterns, specifically in the endosperm. Its dominant allele (Pln) leads to palmitate esters and low free sterols, while the recessive allele (pln) results in linoleate esters and high free sterols.

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Area of Science:

Plant genetics
Lipid biochemistry
Wheat endosperm development

Background:

Gene Pln influences sterol ester patterns in wheat kernels.
Sterol esterification is crucial for plant development and lipid metabolism.

Purpose of the Study:

To investigate the tissue-specific action of gene Pln in wheat.
To elucidate the relationship between gene Pln alleles and free sterol levels.
To determine the developmental timing of sterol esterification divergence.

Main Methods:

Analysis of sterol ester profiles in different wheat tissues (endosperm, embryo, pericarp, seed coat).
Genotyping to distinguish between dominant (Pln) and recessive (pln) alleles.
Sterol analysis at various developmental stages post-anthesis.

Main Results:

Gene Pln's activity is confined to the wheat endosperm.
The dominant Pln allele is associated with high palmitate ester levels and low free sterols.
The recessive pln allele is linked to high linoleate ester levels and high free sterols.
Phenotypic divergence begins around 21 days post-anthesis during cell enlargement.
Increased esterification, driven by the dominant allele, affects major 4-demethyl sterols.

Conclusions:

Gene Pln plays a critical role in regulating sterol esterification specifically within the wheat endosperm.
Allelic variations in Pln directly impact free sterol content and esterification patterns during kernel development.
The findings provide insights into the genetic control of lipid metabolism in developing cereal grains.