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
Filter
  • Agrobacterium rhizogenes  (3)
  • Springer  (3)
  • American Association for the Advancement of Science (AAAS)
  • American Society of Hematology
Collection
Keywords
Publisher
  • Springer  (3)
  • American Association for the Advancement of Science (AAAS)
  • American Society of Hematology
Years
  • 1
    Electronic Resource
    Electronic Resource
    Horizontal gene transfer: regulated expression of a tobacco homologue of the Agrobacterium rhizogenes rolC gene (1995)
    Springer
    Molecular genetics and genomics 249 (1995), S. 265-273 
    Details
    ISSN: 1617-4623
    Keywords: Agrobacterium rhizogenes ; Horizontal gene transfer ; Evolution ; Ri plasmid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A tobacco homologue (trolC) of the rolC gene of the Agrobacterium rhizogenes Ri-plasmid was cloned and sequenced from Nicotiana tabacum L. cv. Havana 425. The coding region of trolC is similar in sequence (69–87% for DNA and 5489% for the deduced amino acid sequence) to rolC genes of the agropine, mannopine, and mikimopine strains of Ri-plasmids and the N. glauca rolC homologue. Southern analyses showed that trolC is encoded by a small gene family derived from the tomentosiformis ancestor of tobacco. This suggests that trolC resulted from an ancient transfer of DNA between A. rhizogenes and a progenitor of modern tobacco. Transcripts of trolC were detected in three morphologically distinct cultivars of tobacco. trolC mRNA accumulated in young leaves and shoot tips, but not in lower leaves and roots of mature plants. Accumulation of trolC mRNA in cultured leaf tissues was strongly down-regulated by auxin and induced by cytokinin. These results are of particular interest because they suggest that a gene of bacterial origin introduced during evolution can have a function in a modern plant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00290526
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Evidence for the expression of the rol genes of Nicotiana glauca in genetic tumors of N. glauca x N. langsdorflli (1990)
    Springer
    Molecular genetics and genomics 220 (1990), S. 177-180 
    Details
    ISSN: 1617-4623
    Keywords: Genetic tumor ; Agrobacterium rhizogenes ; rol genes ; Auxin sensitivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Thus far, no evidence has been presented that the rol genes (Ng rol) of Nicotiana glauca (Furner et al. 1986) are expressed in this plant. However, we found that the Ng rol genes were transcribed in genetic tumors formed in hybrids of N. glauca x N. langsdorffii. During the culture of such genetic tumors, the level of transcription of Ng rol B increased while that of Ng rol C decreased in parallel with an increase in the endogenous auxin level in the tissues. Moreover, the transcription of these genes was completely suppressed by the application of exogenous auxin. Since the measured endogenous level of auxin was rather low, the formation of tumors in these hybrids can be tentatively explained as a consequence of the expression of rol genes that is responsible for the increased sensitivity to auxin of the hybrids. This novel finding is discussed in relation to the cause of genetic tumors in Nicotiana.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260478
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Sequence of the cellular T-DNA in the untransformed genome of Nicotiana glauca that is homologous to ORFs 13 and 14 of the Ri plasmid and analysis of its expression in genetic tumors of N. glauca x N. langsdorffii (1994)
    Springer
    Molecular genetics and genomics 243 (1994), S. 706-710 
    Details
    ISSN: 1617-4623
    Keywords: Genetic tumors ; Nicotiana glauca T-DNA ; Agrobacterium rhizogenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A region homologous to the TL-DNA of Agrobacterium rhizogenes was previously detected in the genome of untransformed Nicotiana glauca and designated cellular T-DNA (cT-DNA). Subsequently, part of this region was sequenced and two genes, which corresponded to rolB and rolC and were named NgrolB and NgrolC, were found. We have now sequenced a region of the cT-DNA other than the region that includes NgrolB and C and we have found two other open reading frames (ORFs), NgORF13 and NgORF14. These ORFs correspond to ORFs 13 and 14 of the TL-DNA of A. rhizogenes and exhibit a high degree of homology to these ORFs, without having a nonsense codon. We have not found any sequence homologous to rolD (ORF15). The two genes, NgORF13 and 14, as well as the NgrolB and C genes, are expressed in genetic tumors of hybrids between N. glauca and N. langsdorffii but not in leaf tissues of the hybrid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00279581
    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...