The DOI matches its Crossref record; 45 of the 45 references it cites were found in a registry or an index.
dwarf and delayed‐flowering 1, a novel Arabidopsis mutant deficient in gibberellin biosynthesis because of overexpression of a putative AP2 transcription factor
Open accessAbstract
Summary: A novel gibberellin (GA)‐deficient mutant designated dwarf and delayed‐flowering 1 (ddf1) was isolated from a library of activation‐tagged Arabidopsis. This mutant showed dwarfism and late‐flowering, but the phenotype was rescued by exogenous GA 3 like known mutants defective in GA biosynthesis. The contents of bioactive GA 4 and GA 1 were in fact decreased in ddf1 at least partially through the repression of biosynthetic steps catalyzed by GA 20‐oxidase (GA20ox). Genetic and molecular analyses revealed that the ddf1 phenotypes are caused by increased or ectopic expression of a putative AP2 transcription factor. Overexpression of DDF2, encoding another putative AP2 transcription factor closely related to DDF1, also conferred the ddf1‐like phenotype. Among genes encoding (putative) AP2 transcription factors in Arabidopsis, DDFs are phylogenetically close to dehydration‐responsive element binding protein (DREB1)/C‐repeat binding factor (CBF) genes, which are known to be involved in stress responses. The ddf1 mutation upregulates a stress‐related gene RD29A. DDF1 mRNA is strongly induced by high‐salinity stress within 1 h. Moreover, transgenic plants overexpressing DDF1 showed increased tolerance to high‐salinity stress. These results suggest that DDF1 is involved in the regulation of GA biosynthesis and stress tolerance. The possible relation between the contents of endogenous GAs and acquisition of stress protection is discussed.
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Metadata
- Authors
- Magome, H., Yamaguchi, S., Hanada, A., Kamiya, Y., & Oda, K.
- Venue
- The Plant Journal
- Publisher
- Wiley
- Published
- 2004-01-26
- Volume
- 37
- Issue
- 5
- Pages
- 720-729
- ISSN
- 0960-7412 (ISSN-L)
- 1365-313X
- OpenAlex
- W2165953217
- Cited by
- 361
- References
- 45
- FWCI
- 12.75
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Magome, H., Yamaguchi, S., Hanada, A., Kamiya, Y., & Oda, K. (2004). dwarf and delayed‐flowering 1, a novel Arabidopsis mutant deficient in gibberellin biosynthesis because of overexpression of a putative AP2 transcription factor. The Plant Journal. https://doi.org/10.1111/j.1365-313x.2003.01998.x
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