Journal Article

The <i>Arabidopsis</i> Mutant <i>stg1</i> Identifies a Function for TBP-Associated Factor 10 in Plant Osmotic Stress Adaptation

Xiang Gao, Feng Ren and Ying-Tang Lu

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 47, issue 9, pages 1285-1294
Published in print September 2006 | ISSN: 0032-0781
Published online September 2006 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcj099
The Arabidopsis Mutant stg1 Identifies a Function for TBP-Associated Factor 10 in Plant Osmotic Stress Adaptation

More Like This

Show all results sharing these subjects:

  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

GO

Show Summary Details

Preview

Plant salt tolerance is a complex trait involving many genes. To identify new salt tolerance determinants during seed germination, we have screened a population of chemically inducible activation-tagged Arabidopsis mutants. A mutant, designated stg1 (salt tolerance during germination 1), was obtained. The stg1 mutant is less sensitive than the wild type to NaCl and osmotic stress inhibition of germination in the presence of the inducer. Germination assays on media containing various salts upon inducer application indicate that the stg1 mutation enhances tolerance to Na+ and K+. Under salt stress, stg1 maintains a higher K+/Na+ ratio and accumulates less proline than the wild-type control, suggesting that its salt tolerance mechanisms are mainly involved in the regulation of ion balance. STG1 encodes a putative Arabidopsis TATA box-binding protein (TBP)-associated factor 10 (atTAF10), which constitutes the transcriptional factor IID (TFIID) complex. Overexpression of atTAF10 under the control of the 35S promoter in Arabidopsis improves seed tolerance to salt stress during germination and the knocked-down mutant is more sensitive to salt stress, indicating the transcription initiation factor as a physiological target of salt toxicity in plants.

Keywords: Arabidopsis; Salt tolerance; Seed germination; Stress adaptation; TAF10; TBP-associated factor

Journal Article.  5726 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.