Capsella rubella TGA4, a bZIP transcription factor, causes delayed flowering in Arabidopsis thaliana
Flowering time is usually regulated by many environmental factors and endogenous signals. TGA family members are bZIP transcription factors that bind to the octopine synthase element, which has been closely linked to defense/stress responses. Most TGA factors interact with non-expressor of...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, University of Novi Sad
2016-01-01
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| Series: | Archives of Biological Sciences |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-4664/2016/0354-46641500141L.pdf |
| Summary: | Flowering time is usually regulated by many environmental factors and
endogenous signals. TGA family members are bZIP transcription factors that
bind to the octopine synthase element, which has been closely linked to
defense/stress responses. Most TGA factors interact with non-expressor of PR1
(NPR1) and plant defense responses are strengthened by this interaction.
TGA1and TGA4factors bind to NPR1 only in salicylic acid (SA)-induced leaves,
suggesting that TGA4 has another function during plant development. Here, we
isolated a bZIP transcription factor gene, TGA4, from Capsella rubella.
TGA4transcripts were detected in most tissues, with high expression in
leaves, low expression in stems and flowering buds, and undetectable in
siliques. CruTGA4was over expressed in Arabidopsis thaliana wild typeCol-0
plants. Flowering time and total leaf number in the transgenic plants showed
that overexpression of CruTGA4could delay flowering in A. thaliana. Our
findings suggest that TGA4 may act as flowering regulator that controls plant
flowering. |
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| ISSN: | 0354-4664 1821-4339 |