Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Drought Stress Signal Transduction by the HD-Zip Transcription Factors ATHB6 and ATHB7
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Faculty of Science and Technology, Biology, Department of Evolutionary Biology, Physiological Botany.
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This work describes the regulation of drought stress responses in Arabidopsis thaliana and adresses the roles of the homeodomain-leucine zipper (HD-Zip) transcription factors in this regulation. The characteristics of ATHB6 and ATHB7, two genes encoding class I HD-Zip transcription factors were analysed.

Expression of ATHB6 and ATHB7 was transcriptionally activated in plants subjected to water deficit or exogenous treatment with abscisic acid (ABA).

Transgenic plants constitutively expressing the ATHB7 gene displayed a delayed elongation growth of the main inflorescence stem after transition to reproductive development. This phenotype is consistent with ATHB7 acting as a negative regulator of growth and development of the elongating stem in response to water availability.

Transgenic abi1-1 mutant plants constitutively expressing the ATHB7 gene displayed a reduced wiltiness as compared to monogenic abi1-1 mutants. These data are consistent with the ATHB7 protein having a central role in the drought stress response, regulating the water balance of the plant, and acting downstream to ABI1. Furthermore, the data is consistent with ATHB7 acting as a positive regulator of the drought stress response.

The ABA-induced expression of the ATHB7 gene displayed a dependence on the phytochrome system, suggesting an interplay between light and osmotic stress signaling in the regulation of the ATHB7 gene.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 2002. , p. 50
Series
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 690
Keywords [en]
Plant physiology
Keywords [sv]
Växtfysiologi
National Category
Botany
Research subject
Physiological Botany
Identifiers
URN: urn:nbn:se:uu:diva-1857ISBN: 91-554-5249-3 (print)OAI: oai:DiVA.org:uu-1857DiVA, id: diva2:161421
Public defence
2002-04-05, the lecture hall at the Department of Physiological Botany, Uppsala, 10:00
Opponent
Available from: 2002-03-14 Created: 2002-03-14Bibliographically approved

Open Access in DiVA

fulltext(348 kB)1672 downloads
File information
File name FULLTEXT01.pdfFile size 348 kBChecksum MD5
e76ec051cfd1139529d6ea9ea223a6e6a5d4e88905963b536cac44859ade60c58885c58a
Type fulltextMimetype application/pdf
Buy this publication >>

By organisation
Physiological Botany
Botany

Search outside of DiVA

GoogleGoogle Scholar
Total: 1672 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 944 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf