ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    LIGNIN BIOSYNTHESIS (2003)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology and Plant Molecular Biology 54 (2003), S. 519-546 
    Details
    ISSN: 1040-2519
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Notes: Abstract The lignin biosynthetic pathway has been studied for more than a century but has undergone major revisions over the past decade. Significant progress has been made in cloning new genes by genetic and combined bioinformatics and biochemistry approaches. In vitro enzymatic assays and detailed analyses of mutants and transgenic plants altered in the expression of lignin biosynthesis genes have provided a solid basis for redrawing the monolignol biosynthetic pathway, and structural analyses have shown that plant cell walls can tolerate large variations in lignin content and structure. In some cases, the potential value for agriculture of transgenic plants with modified lignin structure has been demonstrated. This review presents a current picture of monolignol biosynthesis, polymerization, and lignin structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.arplant.54.031902.134938
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Genetically modified lignin below ground (2007)
    [s.l.] : Nature Publishing Group
    Nature biotechnology 25 (2007), S. 168-169 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] To the editor: Correspondence in Nature Biotechnology in response to a News Feature on the biotechnological potential and environmental risks of releasing transgenic trees has drawn attention to our earlier paper reporting the first field trials of trees with modified lignin. The focus of this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nbt0207-168
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Forest biotechnology makes its position known (1999)
    [s.l.] : Nature America Inc.
    Nature biotechnology 17 (1999), S. 1145-1145 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] Last July, the world's largest group of scientists studying molecular biology and biotechnology of forest trees met at the University of Oxford, England*. To the surprise of the attendees, the meeting, organized by the International Union of Forestry Research Organizations (IUFRO, Vienna, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/70652
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Field and pulping performances of transgenic trees with altered lignification (2002)
    [s.l.] : Nature Publishing Group
    Nature biotechnology 20 (2002), S. 607-612 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] The agronomic and pulping performance of transgenic trees with altered lignin has been evaluated in duplicated, long-term field trials. Poplars expressing cinnamyl alcohol dehydrogenase (CAD) or caffeate/5-hydroxy-ferulate O-methyltransferase (COMT) antisense transgenes were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nbt0602-607
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Factors regulating the expression of cell cycle genes in individual buds ofPopulus (1997)
    Springer
    Planta 201 (1997), S. 43-52 
    Details
    ISSN: 1432-2048
    Keywords: Bud dormancy ; Cell cycle ; Populus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The early and differential responses of the individual buds along a shoot have remained largely unknown due to the difficulties of analyzing early indicators that allow the monitoring of the effects of subtle changes in the environment on the growth activity of the individual bud. To overcome this problem, we transformed poplar [Populus tremula (L.) xP. alba (L.)] with two chimeric genes,Pcdc2a-gus andPcycl At-gus, the expression of which is closely linked to cell division inArabidopsis thaliana (L.) Heynh. We analyzed the expression levels of both chimeric genes in individual buds of the same tree, and under different conditions known to promote or retard growth in the buds. The expression levels of both chimeric genes were found to reflect closely the growth activity of the buds. After decapitation of the shoot, the expression ofPcdc2a-gus andPcycl At-gus revealed rapid and selective changes in the cell cycle, even when no morphological changes were observed. Furthermore, on the basis of the expression of the chimeric cell cycle genes, different degrees of growth activity and dormancy could be discriminated in the axillary buds. In addition, the expression ofPcycl At-gus was found to be closely associated with the day length, which is critical for dormancy induction in poplar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01258679
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Wood formation in poplar: identification, characterization, and seasonal variation of xylem proteins (2000)
    Springer
    Planta 210 (2000), S. 589-598 
    Details
    ISSN: 1432-2048
    Keywords: Key words: Lignification –Populus– Protein database – Protein microsequencing – Proteomics – Wood formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Proteins that are preferentially produced in developing xylem may play a substantial role in xylogenesis. To reveal the identity of these proteins, comparative two-dimensional polyacrylamide gel electrophoresis was performed on young differentiating xylem, mature xylem, and bark of poplar (Populus trichocarpa Hook. cv. `Trichobel') harvested at different times of the year. The most-abundant xylem proteins were identified by microsequence analysis. For 17 of these proteins a putative function could be assigned based on similarity with previously characterized proteins, and for 15 out of these corresponding expressed sequence tags (ESTs) were found in the poplar EST database. The identified xylem–preferential proteins, defined by comparing the protein patterns from xylem and bark, were all involved in the phenylpropanoid pathway: two caffeoyl-coenzyme A O-methyltransferases (CCoAOMT), one phenylcoumaran benzylic ether reductase (PCBER), one bispecific caffeic acid/5-hydroxyferulic acid O-methyltransferase (COMT), five S-adenosyl-L-methionine synthetases, and one homologue of glycine hydroxymethyltransferase (GHMT). Remarkably, the biological function of the two most-abundant xylem-preferential proteins (PCBER and a GHMT homologue) remains unclear. In addition, several housekeeping enzymes were identified: two enolases, two glutamine synthetases, one 70-kDa heat-shock cognate, one calreticulin, and one α-tubulin. In comparison to the xylem-preferential proteins, the housekeeping proteins were expressed at significant levels in the bark as well. Also, several additional protein spots were detected for CCoAOMT, PCBER, and COMT by immunoblot. Our data show that for the study of xylogenesis, two-dimensional protein gel comparisons combined with systematic protein sequencing may yield information complementary to that from EST sequencing strategies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004250050048
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Phenylcoumaran benzylic ether reductase, a prominent poplar xylem protein, is strongly associated with phenylpropanoid biosynthesis in lignifying cells (2000)
    Springer
    Planta 211 (2000), S. 502-509 
    Details
    ISSN: 1432-2048
    Keywords: Key words: Lignan – Lignification – Phenylcoumaran benzylic ether reductase –Populus (lignification) – Wood – Xylem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract.  It has previously been shown (D.R. Gang et al., 1999, J Biol Chem 274: 7516–7527) that the most abundant protein in the secondary xylem of poplar (Populus trichocarpa cv. `Trichobel') is a phenylcoumaran benzylic ether reductase (PCBER), an enzyme involved in lignan synthesis. Here, the distribution and abundance of PCBER in poplar was studied at both the RNA and protein level. The cellular expression pattern was determined by immunolocalization of greenhouse-grown plants as well as of a field-grown poplar. Compared to other poplar tissues, PCBER is preferentially produced in the secondary xylem of stems and roots and is associated with the active growth period. The protein is present in all cells of the young differentiating xylem, corresponding to the zone of active phenylpropanoid metabolism and lignification. In addition, PCBER is located in young differentiating phloem fibers, in xylem ray parenchyma, and in xylem parenchyma cells at the growth-ring border. Essentially the same expression pattern was observed in poplars grown in greenhouses and in the field. The synthesis of PCBER in phenylpropanoid-synthesizing tissues was confirmed in a bending experiment. Induction of PCBER was observed in the pith of mechanically bent poplar stems, where phenylpropanoid metabolism is induced. These results indicate that the products of PCBER activity are synthesized mainly in lignifying tissues, suggesting a role in wood development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004250000326
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Application of AFLP™-based molecular markers to breeding of Populus spp. (1996)
    Springer
    Plant growth regulation 20 (1996), S. 47-52 
    Details
    ISSN: 1573-5087
    Keywords: AFLP™ ; fingerprint ; genome mapping ; molecular markers ; poplar ; QTL
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Molecular marker technologies have eased and potentiated genetic analysis of plants and have become an extremely useful tool in forest tree breeding. The information provided by molecular markers has made it possible to acquire further knowledge about the structure and organization of plant genomes as well as about the evolution of these plant genomes through phylogenetic analysis. Using Populus spp. as a model tree, this paper aims at showing and discussing the possible applications of AFLP™, a high-density DNA marker technology developed by Keygene N.V. (Wageningen, The Netherlands). Applications include: (i) AFLP analysis of the disease resistance against Melampsora larici-populina using bulked-segregant analysis, (ii) AFLP fingerprinting for identification and taxonomic analysis of individual trees, and (iii) AFLP-based mapping strategies in Populus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024057
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Upstream sequences regulating legumin gene expression in heterologous transgenic plants (1991)
    Springer
    Molecular genetics and genomics 225 (1991), S. 121-128 
    Details
    ISSN: 1617-4623
    Keywords: Faba bean legumin gene ; Plant gene regulation ; Transgenic plants ; Seed-specific expression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have previously isolated a legumin gene LeB4 from Vicia faba and shown that a 4.7 kb DNA fragment containing the gene leads to seed-specific expression in transgenic tobacco plants. Here we report that the 2.4 kb upstream sequence alone, when fused to either the neomycin phosphotransferase II (nptII) gene or the β-glucuronidase (uidA) gene, leads to high enzyme levels in transgenic seeds of both tobacco and Arabidopsis. β-Glucuronidase (GUS) activity is especially intense in the cotyledons fading out towards the embryonal root tip, a result confirmed by in situ hybridization. Staining of endosperm cells is consistent in both species. Analysis of a series of promoter deletion mutants fused to the nptII gene and introduced into tobacco plants revealed that about 1 kb of 5′-flanking sequence is sufficient for high-level expression but indirect evidence suggests the presence of weak positive regulatory elements further upstream. Deletions leaving only 0.2 kb of upstream sequence reduce enzyme levels to less than 10%. A deletion which destroys the legumin box with its seed protein gene-specific CATGCATG motif has no obvious effects on expression levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00282650
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    A novel seed protein gene from Vicia faba is developmentally regulated in transgenic tobacco and Arabidopsis plants (1991)
    Springer
    Molecular genetics and genomics 225 (1991), S. 459-467 
    Details
    ISSN: 1617-4623
    Keywords: Arabidopsis thaliana ; β-Glucuronidase ; Root tip ; Seed protein gene ; Vicia faba
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have isolated a novel gene, denoted USP, from Vicia faba var. minor, which corresponds to the most abundant mRNA present in cotyledons during early seed development; however, the corresponding protein does not accumulate in cotyledons. The characterized USP gene with its two introns is 1 of about 15 members of a gene family. A fragment comprising 637 bp of 5′ flanking sequence and the total 5′ untranslated region was shown to be sufficient to drive the mainly seed-specific expression of two reporter genes, coding for neomycin phosphotransferase 11 and β-glucuronidase, in transgenic Arabidopsis thaliana and Nicotiana tabacum plants. We showed that the USP promoter becomes active in transgenic tobacco seeds in both the embryo and the endosperm, whereas its activity in Arabidopsis is detectable only in the embryo. Moreover, we demonstrated a transient activity pattern of the USP promoter in root tips of both transgenic host species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261688
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...