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Homologous NF-YC2 subunit from arabidopsis and tobacco is activated by photooxidative stress and induces flowering
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Hackenberg, Dieter, Keetman, Ulrich and Grimm, Bernhard (2012) Homologous NF-YC2 subunit from arabidopsis and tobacco is activated by photooxidative stress and induces flowering. International Journal of Molecular Sciences, 13 (3). pp. 3458-3477. doi:10.3390/ijms13033458 ISSN 1422-0067.
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Official URL: http://dx.doi.org/10.3390/ijms13033458
Abstract
The transcription factor NF-Y consists of the three subunits A, B and C, which are encoded in Arabidopsis in large gene families. The multiplicity of the genes implies that NF-Y may act in diverse combinations of each subunit for the transcriptional control. We aimed to assign a function in stress response and plant development to NF-YC subunits by analyzing the expression of NF-Y genes and exploitation of nf-y mutants. Among the subunit family, NF-YC2 showed the strongest inducibility towards oxidative stress, e.g. photodynamic, light, oxidative, heat and drought stress. A tobacco NF-YC homologous gene was found to be inducible by photooxidative stress generated by an accumulation of the tetrapyrrole metabolite, coproporphyrin. Despite the stress induction, an Arabidopsis nf-yc2 mutant and NF-YC2 overexpressors did not show phenotypical differences compared to wild-type seedlings in response to photooxidative stress. This can be explained by the compensatory potential of other members of the NF-YC family. However, NF-YC2 overexpression leads to an early flowering phenotype that is correlated with increased FLOWERING LOCUS T-transcript levels. It is proposed that NF-YC2 functions in floral induction and is a candidate gene among the NF-Y family for the transcriptional activation upon oxidative stress. View Full-Text
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Journal or Publication Title: | International Journal of Molecular Sciences | ||||
Publisher: | M D P I AG | ||||
ISSN: | 1422-0067 | ||||
Official Date: | 2012 | ||||
Dates: |
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Volume: | 13 | ||||
Number: | 3 | ||||
Page Range: | pp. 3458-3477 | ||||
DOI: | 10.3390/ijms13033458 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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