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| Content Provider | Springer Nature Link |
|---|---|
| Author | Harn, Chee Hark Daie, Jaleh |
| Copyright Year | 1997 |
| Abstract | Sugar beet plants(Beta vulgaris L.) were exposed to long-term incubation in light (34 h) and dark (78 h) and changes in enzyme activity, protein and transcripts levels of cytosolic fructose-1, 6-bisphosphatase (FBPase) in leaves were measured. The enzyme activity in leaves exposed to 34 h light was three times higher than the activity in leaves subjected to 78 h dark condition. Surprisingly, the enzyme activity was still remained stable even in the long-term dark treatment although the activity is lower. The transcript levels of cytosolic FBPase in 78 h dark were expressed equivalent to 10% of the expression occurred in 34 h light. However, the protein levels remained unchanged in long-term incubation with either light or dark. The cytosolic FBPase protein was found to be modified during the long-term dark incubation. The isoelectric pH for the protein spot detected by western blot on the two dimensional PAGE is 5. 4 in light sample while the pH value in dark sample is 6.0. Interestingly, the cytosolic FBPase in long-term dark treated leaves was activated 44% more by incubating in 50 m M mannose (sequestering agent of endogenous Pi) comparing to the activity with mannitol treatment as a control. Collectively, these data suggest that the cytosolic FBPase become less active by post-translational modification during a long-term dark period and this modification probably occurs due to the phosphorylation of the enzyme. |
| Starting Page | 220 |
| Ending Page | 226 |
| Page Count | 7 |
| File Format | |
| ISSN | 12269239 |
| Journal | Journal of Plant Biology |
| Volume Number | 40 |
| Issue Number | 3 |
| e-ISSN | 18670725 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 1997-01-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | cytosolic FBPase regulation protein modification sucrose phosphorylation Plant Sciences Plant Breeding/Biotechnology Plant Genetics & Genomics Plant Systematics/Taxonomy/Biogeography Plant Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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