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  • 1
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    Purification and properties of an endospermic protein of maize associated with the Opaque-2 and Opaque-6 genes (1986)
    Springer
    Details
    Publication Date: 1986-04-01
    Print ISSN: 0032-0935
    Electronic ISSN: 1432-2048
    Topics: Biology
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Analysis of in vivo and in vitro grown endosperms of high and low protein strains of maize
    Amsterdam : Elsevier
    Plant Science 73 (1991), S. 1-9 
    Details
    ISSN: 0168-9452
    Keywords: Zea mays L ; endosperm development ; in vitro culture ; storage proteins ; zeins
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-9452(91)90120-W
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Anthocyanin and proteins as biochemical markers in maize endosperm cultures (1988)
    Springer
    Plant cell reports 7 (1988), S. 78-81 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Endosperm maize cultures derived from a strain homozygous for all genes required for anthocyanin synthesis develop an intense pigmentation. Pigmenting ability is generally maintained in successive subcultures, altough colourless areas are frequently observed in pigmented cultures. The isolated colourless cell clusters show a growth rate higher than the coloured ones. These calli nevertheless do not lose the ability to synthesize anthocyanins, and in successive subcultures turn red again. The different growth rates associated with the ability of cells to accumulate pigments suggest the existence of different physiological states of the culture. To investigate this possibility we analyzed the polypeptide patterns of coloured and colourless cultures. SDS gel electrophoresis has demonstrated differences in soluble protein fractions, among which a 26 kD peptide, characteristic of pigmented tissues, has been evidenced. Zein, the major storage protein of maize endosperm is present, although at very low levels, both in pigmented and in unpigmented cultures, confirming that its synthesis occurs continuously in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272984
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  • 4
    Electronic Resource
    Electronic Resource
    Purification and properties of an endospermic protein of maize associated with the Opaque-2 and Opaque-6 genes (1986)
    Springer
    Planta 167 (1986), S. 587-594 
    Details
    ISSN: 1432-2048
    Keywords: Endosperm ; Mutant (opaque-2, opaque-6) ; Protein (b-32) ; Zea (storage protein)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Maize endosperms accumulate during development a large amount of storage proteins (zeins). The rate of zein accumulation is under the control of several regulatory genes. Two of these, the opaque-2 and opaque-6 mutants, lower the zein level, thus improving the nutritional quality of maize meals. An endosperm protein of Mr 32 000 (b-32) appears to be correlated with the zein level. The b-32 protein is encoded by the opaque-6 gene which, in turn, is activated by opaque-2. We report the purification, amino-acid composition and peptide map of b-32 protein. Furthermore we demonstrate that the protein exists as a monomer likely located in the soluble cytoplasm. As a step towards the isolation of a complementary-DNA clone for b-32 protein, the purification of its corresponding mRNA is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391237
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  • 5
    Electronic Resource
    Electronic Resource
    Free and bound indole-acetic acid is low in the endosperm of the maize mutantdefective endosperm-B18 (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 602-605 
    Details
    ISSN: 1432-2242
    Keywords: Indole-acetic acid ; Auxin ; Defective endosperm mutants ; Hormonal mutants ; Seed development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The maize mutant defective endosperm-B18 (de *-B18), which is recessive to its wildtype, accumulates substantially less dry matter in the endosperm than its normal counterpart. Both free and bound indole-acetic acid (IAA) content has been measured at 5 different developmental stages. In endosperm tissue, the level of IAA is at least 15 times lower in the mutantde * -B18 than in the wildtype. The situation found in the diploid tissues is somewhat different: in the mature embryo the level of total IAA is lower in the mutant than in the wildtype, while in 4-day old seedlings the level of total IAA is, to some degree, similar in both genotypes. Naphthalene-acetic acid (NAA), a stable synthetic auxin which mimics IAA in its biochemical effects, is able to normalize the seed weight of the mutant when applied to developing grains. The results favor the conclusion that in maize endosperm the mutationde * -B18 is involved in IAA metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00288997
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic relationship between o6 and pro-1 mutants in maize (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 778-781 
    Details
    ISSN: 1432-2242
    Keywords: Proline requiring mutants ; b-32 protein ; Maize endosperm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This paper reports that the opaque-6 (o6) mutation of maize, which causes seedling lethality and interferes in the endosperm with the synthesis of zeins and b-32 protein, is a proline requiring mutant functionally allelic to proline-1 (pro-1). Furthermore, immunological studies on the b-32 content of ten independently originated o6 and pro-1 alleles demonstrated that four alleles contain an apparently normal b-32 protein while the others are either devoid of it or contain trace amounts of cross-reacting proteins of lower molecular weight.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266544
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  • 7
    Electronic Resource
    Electronic Resource
    Genetic control of a membrane component and zein deposition in maize endosperm (1983)
    Springer
    Molecular genetics and genomics 192 (1983), S. 316-321 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An association is reported between an albuminlike protein (b-70) and the semidominant locus fluory-2 (fl2) which reduces the level of zein polypeptides in the maize endosperm. The protein b-70 is present at low level in wild-type endosperms and derppressed in fl2 endosperms. A correlation between the doses of the fl2 allele and the b-70 level has been found. Moreover a concomitant loss of the regulatory role of fl2 on zein level and on b-70 overproduction is evident when fl2 is genetically associated with o2 and o7, two recessive alleles of other zein regulatory loci. Protein b-70 is located on the membrane of the protein body where zein polypeptides accumulate. The existence of a functional relationship between this protein and the zein-secretory system is suggested or, as an alternative, that b-70 is a type of storage protein different from zeins, repressed in normal endosperms and derepressed by the fl2 allele.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392168
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