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  • 1
    Electronic Resource
    Electronic Resource
    A thermosensory pathway controlling flowering time in Arabidopsis thaliana (2003)
    [s.l.] : Nature Publishing Group
    Nature genetics 33 (2003), S. 168-171 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Onset of flowering is controlled by environmental signals such as light and temperature. Molecular-genetic studies in Arabidopsis thaliana have focused on daily light duration, or photoperiod, and transient exposure to winter-like temperatures, or vernalization. Yet ambient growth temperature, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/ng1085
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  • 2
    Electronic Resource
    Electronic Resource
    Integration of floral inductive signals in Arabidopsis (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 404 (2000), S. 889-892 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Flowering of Arabidopsis is regulated by a daylength-dependent pathway that accelerates flowering in long days and a daylength-independent pathway that ensures flowering in the absence of inductive conditions. These pathways are genetically separable, as there are mutations that delay ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35009125
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  • 3
    Electronic Resource
    Electronic Resource
    The fdp1 and cif1 mutations are caused by different single nucleotide changes in the yeast CIF1 gene (1993)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 107 (1993), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The allelism between the mutations cif1 and fdp1 from Saccharomyces cerevisiae has been demonstrated using PCR techniques and complementation of function. The cif1 mutation results in a shortened version of the protein while the fdp1 mutation introduces a charged residue in a highly hydrophobic stretch.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1993.tb06038.x
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  • 4
    Electronic Resource
    Electronic Resource
    Lack of lactate-proton symport activity in pck1 mutants of Saccharomyces cerevisiae (1995)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 128 (1995), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Mutants of Saccharomyces cerevisiae without phosphoenolpyruvate carboxykinase activity showed no measurable lactate proton symport, while mutants without fructose-1,6-bisphosphatase had normal transport activity. Incubation of a pck1 mutant, under derepression conditions in the presence of glycerol, restored the activity of the lactate-proton symport, with identical kinetic characteristics to that in the wild-type. For efficient lactate-proton symport activity, not only is an external inducer such as lactic acid needed, but also a molecule derived from the acid metabolism may be necessary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1995.tb07536.x
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  • 5
    Electronic Resource
    Electronic Resource
    Use of Yarrowia lipolytica hexokinase for the quantitative determination of trehalose 6-phosphate (1994)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 121 (1994), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract This paper describes a procedure for the quantitative determination of trehalose 6-phosphate (T6P) based on its ability to inhibit hexokinase from Yarrowia lipolytica. The assay is linear between 1 nmol and at least 8 nmol. The concentration of T6P in wild-type Saccharomyces cerevisiae (0.15 mM) and in ras2 mutants (0.25 mM) remained unchanged in the exponential or stationary phase of growth or after heat shock. A tps1 mutant affected in T6P synthase did not show detectable T6P. Heat shock increased the concentration of T6P in Schizosacharomyces pombe from 0.43 to 0.75 mM.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1994.tb07102.x
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  • 6
    Electronic Resource
    Electronic Resource
    Identification of extragenic suppressors of the cif1 mutation in Saccharomyces cerevisiae (1994)
    Springer
    Current genetics 25 (1994), S. 89-94 
    Details
    ISSN: 1432-0983
    Keywords: cif1 ; Suppressor ; Trehalose ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cif1 mutation of Saccharomyces cerevisiae causes inability to grow on glucose and related fermentable carbon sources. We have isolated two different suppressor mutations that allow growth on glucose of yeasts carrying the cif1 mutation. One of them, sci1-1, is recessive and caused inability to grow on non-fermentable carbon sources and to de-repress fructose-1,6-bisphosphatase. The other suppressor mutation, SCI2-1, is dominant and diminished the capacity to phosphorylate glucose or fructose. The SCI2-1 mutation decreased sporulation efficiency by 70% in heterozygosis and by more than 90% in homozygosis. In a CIF1 background, cells carrying the mutation SCI2-1 accumulated trehalose during the logarithmic phase of growth and hyperaccumulated it during the stationary phase. Genetic tests showed that SCI2 was either allelic, or else closely linked, to HXK2. The concentrations of the glycolytic metabolites measured during growth on glucose in cells carrying the cif1 mutation and any of the suppressor mutations were similar to those of a wild-type. Both types of suppressor mutations restored the transient cAMP response to glucose to cif1 mutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309531
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  • 7
    Electronic Resource
    Electronic Resource
    Mode of action of the gcr9 and cat3 mutations in restoring the ability of Saccharomyces cerevisiae tps1 mutants to grow on glucose (1995)
    Springer
    Molecular genetics and genomics 249 (1995), S. 655-664 
    Details
    ISSN: 1617-4623
    Keywords: Trehalose-6-phosphate synthase ; Glycerol ; Glucose transport ; Antimycin A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mutations in the TPS1 gene, which encodes trehalose-6-P synthase, cause a glucose-negative phenotype in Saccharomyces cerevisiae. Antimycin A or disruption of the QCR9 gene, which encodes one subunit of the cytochrome bc 1 complex, restore the ability to grow in glucose-containing media. Under these conditions the cell excreted a large amount of glycerol, corresponding to about 20% of the glucose taken up. Suppression appears to be achieved by diversion of accumulated glycolytic intermediates to the production of glycerol, thereby providing NAD+ and phosphate for the glyceraldehyde-3-P dehydrogenase reaction. Analysis of the mutation scil-1, which also suppresses the glucose-negative phenotype of tps1 mutants, showed that glucose transport was decreased in scil-1 mutants. The gene SCI1 was cloned and its nucleotide sequence revealed it to be identical to CAT3/SNF4. The suppression mediated by scil-1 is attributable to a decrease in glycolytic flux.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00418035
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  • 8
    Electronic Resource
    Electronic Resource
    Molecular cloning of CIF1, a yeast gene necessary for growth on glucose (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Yeast 8 (1992), S. 183-192 
    Details
    ISSN: 0749-503X
    Keywords: CIF1 gene ; catabolite inactivation ; chromosome II ; S. cerevisiae ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The cif1 mutation of Saccharomyces cerevisia (Navon et al., Biochemistry 18, 4487-4499, 1979) causes inability to grow on glucose and absence of catabolite inactivation. We have cloned the CIF1 gene by complementation of funcion and licated it in a 2·75 kb SphI-BstEII fragment situated at ca. 18 kb centomere distal of LYS2 and ca. 80 kb centromere proximal of TYRI on chromosome II. Southern analysis demostrated that CIF1 is present in a single copy in the yeast genome. Northern analysis revealed that the corresponding mRNA of 1·8 kb is more abundant in cells grown on galactose than in those grown on glucose. A protein of ca. 54 kDa was predicted from the open reading frame in the sequenced fragment. In strains carrying the cif1 mutation the intracellular concentration of ATP decreased immediately after addition of glucose while the intracellular concentration of cAMP did not increse. cAMP concentration increases in response to galactose or 2,4-dinitrophenol. Disruption of BCY1 or overexpression of CDC25 in a cif1/, background did not restore growth on glucose, suggesting that the absence of cAMP signal is not primary cause of lack of growth on glucose. Complementation tests showed that cif1 is not allelic to fdp1 although the two genes seem to be functionally related.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/yea.320080304
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  • 9
    Electronic Resource
    Electronic Resource
    Illuminating flowers: CONSTANS induces LEAFY expression (1997)
    New York, NY : Wiley-Blackwell
    BioEssays 19 (1997), S. 277-279 
    Details
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Higher plants must undergo a major developmental switch, the transition to flowering, if they are to successfully complete their life cycle. In many plants, the crucial decision of when to begin to produce flowers is primarily controlled by environmental signals. The process of floral induction involves the integration of the activities of two types of genes: those that control flowering time as a response to the environment as well as an endogenous clock, and those that determine the floral identity of the cells. The first direct link between these two classes of genes has now been demonstrated(1). Forced expression of CONSTANS, a flowering-time gene, promotes flowering through the transcriptional activation of LEAFY, a flower-meristem-identity gene.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bies.950190403
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  • 10
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    Auxin methylation is required for differential growth inArabidopsis (2018)
    National Academy of Sciences
    Details
    Publication Date: 2018-06-13
    Description: Asymmetric auxin distribution is instrumental for the differential growth that causes organ bending on tropic stimuli and curvatures during plant development. Local differences in auxin concentrations are achieved mainly by polarized cellular distribution of PIN auxin transporters, but whether other mechanisms involving auxin homeostasis are also relevant for the formation of auxin gradients is not clear. Here we show that auxin methylation is required for asymmetric auxin distribution across the hypocotyl, particularly during its response to gravity. We found that loss-of-function mutants inArabidopsis IAA CARBOXYL METHYLTRANSFERASE1(IAMT1) prematurely unfold the apical hook, and that their hypocotyls are impaired in gravitropic reorientation. This defect is linked to an auxin-dependent increase inPINgene expression, leading to an increased polar auxin transport and lack of asymmetric distribution of PIN3 in theiamt1mutant. Gravitropic reorientation in theiamt1mutant could be restored with either endodermis-specific expression ofIAMT1or partial inhibition of polar auxin transport, which also results in normalPINgene expression levels. We propose that IAA methylation is necessary in gravity-sensing cells to restrict polar auxin transport within the range of auxin levels that allow for differential responses.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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