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Ectopic Expression ...
Ectopic Expression of EFFECTOR OF TRANSCRIPTION Perturbs Gibberellin-Mediated Plant Developmental Processes
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- Ellerström, Mats, 1961 (author)
- Gothenburg University,Göteborgs universitet,Botaniska institutionen,Botanical Institute
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Reidt, W. (author)
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Ivanov, R. (author)
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Tiedemann, J. (author)
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Melzer, M. (author)
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Tewes, A. (author)
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Moritz, T. (author)
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Mock, H.-P. (author)
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Sitbon, F. (author)
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Rask, L. (author)
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Bäumlein, H. (author)
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(creator_code:org_t)
- Springer Science and Business Media LLC, 2005
- 2005
- English.
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In: Plant Molecular Biology. - : Springer Science and Business Media LLC. - 0167-4412 .- 1573-5028. ; 59:4, s. 663-681
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https://doi.org/10.1...
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Abstract
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- The plant hormone gibberellin (GA) is known to modulate various aspects of plant cell differentiation and development. The current model of GA-mediated regulation is based on a de-repressible system and includes specific protein modification and degradation. HRT, a zinc finger protein from barley has been shown to have GA-dependent transcriptional repressing activity on the seed-specific α-amylase promoter [Raventos, D., Skriver, K., Schlein, M., Karnahl, K., Rogers, S.W., Rogers, J.C. and Mundy, J. 1998. J.␣Biol. Chem. 273: 2331323320]. Here we report the characterization of a dicot homologue from Brassica napus (BnET) and provide evidence for its role in GA response modulation suggesting that this could be a conserved feature of this gene family. When BnET is ectopically expressed in either Arabidopsis or tobacco the phenotypes include dwarfism due to shorter internodes and late flowering, reduced germination rate, increased anthocyanin content and reduced xylem lignification as a marker for terminal cell differentiation. Transient expression in protoplasts supports the notion that this most likely is due to a transcriptional repression of GA controlled genes. Finally, histological analysis showed that in contrast to other GA deficient mutants the shorter internodes were due to fewer but not smaller cells, suggesting a function of BnET in GA-mediated cell division control.
Subject headings
- NATURVETENSKAP -- Biologi -- Annan biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Other Biological Topics (hsv//eng)
Keyword
- cell differentiation - dwarf growth - gene regulation - gibberellin - lignification - regulatory protein
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Ellerström, Mats ...
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Reidt, W.
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Ivanov, R.
-
Tiedemann, J.
-
Melzer, M.
-
Tewes, A.
-
show more...
-
Moritz, T.
-
Mock, H.-P.
-
Sitbon, F.
-
Rask, L.
-
Bäumlein, H.
-
show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Other Biological ...
- Articles in the publication
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Plant Molecular ...
- By the university
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University of Gothenburg