Effects of <i>n</i>‐butanol and filipin on membrane permeability of developing wheat endosperms with different sterol phenotypes

Carbonero, Pilar; Torres, J.V.; Garcı́a-Olmedo, Francisco

doi:10.1016/0014-5793(75)81090-8

Cited by 12 publications

(4 citation statements)

References 12 publications

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“…Less destabilization would be needed in the semiarid climate. Admitedly, this hypothesis in highly speculative, but would be consistent with our observations concerning the sensitivity of developing endosperms with the different sterol genotypes to n-butanol and the polyehe antibiotic filipin [26].…”

Section: Discussionsupporting

confidence: 75%

Genetic control of sterol esterification in developing wheat endosperm

Torres

Garcı́a-Olmedo

1975

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metaboli

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Summary1. The action of gene Pin, 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. The dominant alíele Pin, 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 alíele pin, which determines an ester pattern with linoleate as the main ester.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 alíele, is concomitant with a sharp decrease in free sterol.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 cholesterol.

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Section: Discussionsupporting

confidence: 75%

Genetic control of sterol esterification in developing wheat endosperm

Torres

Garcı́a-Olmedo

1975

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metaboli

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“…Our present and previous results [4,5] suggest that endosperm is not involved in supplying sterols to the growing tissues during germination and that, on the other hand, enough sterols are accumulated as esters in the embryo during development to serve that purpose.…”

Section: Disclssionmentioning

confidence: 82%

“…We have previously described two genetic variants of the free and conjugated sterol profile in wheat endosperm [1][2][3][4][5]. One phenotype, designated PL, is characterized by a low proportion of free sterol and a high proportion of steryl palmitate, whereas in the other, L, free sterol is the predominant form.…”

Section: Introductionmentioning

confidence: 99%

Endosperm sterol phenotype and germination in wheat

1976

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Abstract-Free and conjugated sterols of endosperm, coats, scutellum, coleoptile and roots have been analysed at different germination stages in two wheat cultivars with different endosperm sterol phenotypes. It seems that sterol metabolism of the developing tissues, namely coleoptile and roots, is not affected by the sterol conjugation profile of the endosperm. Enough sterol is present in the mature embryo to supply the germinating axis during the observation period (144 hr at 16°). The data suggest that sterol is transferred from scutellum to coleoptile and roots during germination.

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“…Essentially two theories cover most of the proposed functions: sterols act as hormones or their precursors and sterols are structural components of membranes (Barksdale, 1969;Hendrix, 1970;Heftmann, 1975). Suggested functional roles of sterols as part of the integrity of membranes are: they prevent leakage of cells under stress conditions (Gottlieb and Shaw, 1970;Mudd and Kleinschmidt, 1970) and influence uptake of ions (Hendrix and Higinbotham, 1973;Grunwald, 1974;Archer and Gale, 1975;Carbonero et al . , 1975;Karst and Jund, 1976).…”

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confidence: 99%

Physiological aspects of steroids in pollen of Pinus elliotti Engelm /

Peter¹

1979

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Biochemical Aspects of Sterols in Higher PlantsDimethyl sulphoxide (10 -4 M) increased the relative germination to 82%, further addition of pregnenolone, estradiol, estriol or corticosterone (each 10 -5 M) restored germination to almost optimum levels. Animal steroid hormones increased the conductance of the pollen media; however, there was no discernible relationship between increased germination and

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Effects of n‐butanol and filipin on membrane permeability of developing wheat endosperms with different sterol phenotypes

Cited by 12 publications

References 12 publications

Genetic control of sterol esterification in developing wheat endosperm

Genetic control of sterol esterification in developing wheat endosperm

Endosperm sterol phenotype and germination in wheat

Physiological aspects of steroids in pollen of Pinus elliotti Engelm /

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