Response of carbon and nitrogen-rich metabolites to nitrogen deficiency in PSARK::IPT tobacco plants
Rubio-Wilhelmi, M; Sanchez-Rodriguez, E; Leyva, R; Blasco, B; Romero, L; Blumwald, E; Ruiz, JM
| HERO ID | 1535481 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Response of carbon and nitrogen-rich metabolites to nitrogen deficiency in PSARK::IPT tobacco plants |
| Authors | Rubio-Wilhelmi, M; Sanchez-Rodriguez, E; Leyva, R; Blasco, B; Romero, L; Blumwald, E; Ruiz, JM |
| Journal | Plant Physiology and Biochemistry |
| Volume | 57 |
| Page Numbers | 231-237 |
| Abstract | Wild type (WT) and transgenic tobacco plants expressing isopentenyltransferase (IPT), a gene coding the rate-limiting step in cytokinin (CKs) synthesis, were grown under limited nitrogen (N) conditions. Here, we analyse the possible effect of N deficiency on C-rich compounds such as phenolic compounds, as well as on N-rich compounds such as polyamines (PAs) and proline (Pro), examining the pathways involved in their synthesis and degradation. N deficiency was found to stimulate phenolic metabolism and increase these compounds both in P(SARK):IPT as well as in WT tobacco plants. This suggests that nitrate (NO(3)(-)) tissue concentration may act as a signal triggering phenolic compound accumulation in N deficiency plants. In addition, we found the maintenance of PAs in the WT plants would be correlated with the higher stress response to N deficiency. On the contrary, the reduction of free PAs and Pro found in the P(SARK)::IPT plants subjected to N deficiency would indicate the operation of an N-recycling mechanism that could stimulate a more efficient N utilization in P(SARK)::IPT plants. |
| Doi | 10.1016/j.plaphy.2012.06.004 |
| Pmid | 22738868 |
| Wosid | WOS:000307795200028 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: Plant physiology and biochemistry : PPB / Société française de physiologie végétale ISSN: 1873-2690 |
| Is Public | Yes |
| Language Text | English |
| Keyword | Cytokinins; Nitrogen deficiency; Reactive oxidative species; Phenolic compounds; Polyamines; Proline |