Heat-shock induced accumulation of extremely long transcripts containing the rDNA intergenic spacer in arabidopsis

Taku Takahashi, Yoshibumi Komeda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A cDNA clone containing a 1.2-kb fragment derived from the ribosomal DNA (rDNA) intergenic spacer (IGS) of Arabidopsis was characterized. Isolation of this clone was achieved in a previous study by differential screening of a cDNA library prepared from heat-shocked Arabidopsis seedlings (Takahashi and Komeda 1989). Nucleotide sequence analysis revealed that the cDNA had an oligo(dA) sequence that corresponded to the sequence found in the IGS. Northern blot analysis using the cloned cDNA as probe demonstrated that heat-shock treatment of seedlings induced the accumulation of extremely long transcripts with apparent lengths of more than 7 kb. Treatment with arsenite and cadmium ions also led to the accumulation of the RNA, a phenomenon very similar to that observed in the case of expression of genes for heat-shock proteins (HSPs). Although the possibility remains to be excluded that these transcripts might be derived from a region homologous to the IGS located outside the rDNA clusters in Arabidopsis, it is most likely that processing of precursor rRNA and/or termination of transcription of rRNA are greatly impaired under stressed conditions in plants, as reported in the case of animal genes for rRNA (Labhart and Reeder 1987, Parker and Bond 1989).

Original languageEnglish
Pages (from-to)389-394
Number of pages6
JournalPlant and Cell Physiology
Volume33
Issue number4
Publication statusPublished - Jun 1992
Externally publishedYes

Fingerprint

Ribosomal Spacer DNA
Arabidopsis
heat shock
CDNA
intergenic DNA
ribosomal DNA
heat stress
clone
Shock
DNA
Complementary DNA
Hot Temperature
Heat
seedling
Seedlings
arsenite
gene
Clone Cells
Genes
Clone

Keywords

  • Arabidopsis thaliana
  • Heat shock
  • RDNA intergenic spacer
  • RNA processing

ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Applied Mathematics
  • Ecology
  • Cell Biology
  • Physiology
  • Plant Science

Cite this

Heat-shock induced accumulation of extremely long transcripts containing the rDNA intergenic spacer in arabidopsis. / Takahashi, Taku; Komeda, Yoshibumi.

In: Plant and Cell Physiology, Vol. 33, No. 4, 06.1992, p. 389-394.

Research output: Contribution to journalArticle

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