Singh, Prashant and Kaloudas, Dimitrios and Raines, Christine A (2008) Expression analysis of the Arabidopsis CP12 gene family suggests novel roles for these proteins in roots and floral tissues. Journal of Experimental Botany, 59 (14). pp. 3975-3985. DOI https://doi.org/10.1093/jxb/ern236
Singh, Prashant and Kaloudas, Dimitrios and Raines, Christine A (2008) Expression analysis of the Arabidopsis CP12 gene family suggests novel roles for these proteins in roots and floral tissues. Journal of Experimental Botany, 59 (14). pp. 3975-3985. DOI https://doi.org/10.1093/jxb/ern236
Singh, Prashant and Kaloudas, Dimitrios and Raines, Christine A (2008) Expression analysis of the Arabidopsis CP12 gene family suggests novel roles for these proteins in roots and floral tissues. Journal of Experimental Botany, 59 (14). pp. 3975-3985. DOI https://doi.org/10.1093/jxb/ern236
Abstract
The chloroplast protein CP12 has been shown to regulate the activity of two Calvin cycle enzymes, phosphoribulokinase (PRK) and glyceraldehyde-3-phosphate dehydrogenase (GAPDH), by the reversible formation of a multiprotein complex. In Arabidopsis there are three CP12 genes, CP12-1, CP12-2, and CP12-3, and expression analysis suggested that the function of these proteins may not be restricted to the Calvin cycle. Reverse transcription-PCR analysis was used here to investigate further the expression patterns of the three CP12 Arabidopsis genes together with the genes encoding plastid GAPDH (GAPA-1 and GAPB), PRK (PRK), and plastid NAD-dependent GAPDH (GAPCp1 and GAPCp2) during development, in response to changes in light, temperature, and anaerobic conditions. Expression of the CP12-2 gene was similar to that of the Calvin cycle enzymes PRK and GAPDH. However, this was not the case for CP12-1 and -3 which were both expressed in roots. Analysis of transgenic Arabidopsis lines expressing CP12::GUS fusion constructs revealed that the CP12 genes display different spatiotemporal expression patterns. The CP12-1 gene was expressed in root tips whilst CP12-3::GUS expression was evident throughout the root tissue. The most unexpected finding was that all three CP12 genes were expressed in floral tissues; CP12-1 and CP12-2 expression was detected in the sepals and the style of the flower, while in contrast CP12-3::GUS expression was restricted to the stigma and anthers. Taken together, the data suggest that the redox-sensitive CP12 proteins may have a wider role in non-photosynthetic plastids, throughout the plant life cycle. © 2008 The Author(s).
Item Type: | Article |
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Uncontrolled Keywords: | Calvin cycle; non-photosynthetic plastids; redox; thioredoxin |
Subjects: | Q Science > QH Natural history > QH301 Biology |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 07 Oct 2011 10:52 |
Last Modified: | 30 Oct 2024 19:33 |
URI: | http://repository.essex.ac.uk/id/eprint/920 |