Polyamine signaling pathway during environmental stress: Metabolomic approaches to elucidate spermine down-stream targets
Environmental stress is increasingly wearing down crop productivity. Nowadays, one of the main aims of plant research is to elucidate tolerance mechanisms to diverse stresses, in order to provide solutions by generating stress-tolerant plants. In regard with this matter, polyamine signaling pathway...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/315648 |
| Acceso en línea: | http://hdl.handle.net/10803/315648 |
| Access Level: | acceso abierto |
| Palabra clave: | Efecte de l'estrès sobre les plantes Efectos del estrés sobre las plantas Effect of stress on plants Fisiologia vegetal Fisiología vegetal Plant physiology Poliamines Poliaminas Polyamines Ciències de la Salut 58 |
| Sumario: | Environmental stress is increasingly wearing down crop productivity. Nowadays, one of the main aims of plant research is to elucidate tolerance mechanisms to diverse stresses, in order to provide solutions by generating stress-tolerant plants. In regard with this matter, polyamine signaling pathway is of crucial importance. The major polyamines in plants (putrescine, spermidine and spermine) tend to accumulate in response to stress and are associated with a protective role. The trend of their accumulation is related to the stress the plant is sensing; in fact, polyamine biosynthetic pathway is activated at different levels depending on the stimulus, which gives a selective role to these molecules. Spermine, one of the higher polyamines, is not essential for plant growth; however, it is presently known that this molecule plays diverse protective roles under several stress factors and triggers signaling cascades implicated in plant defense. Therefore, research on spermine down-stream targets has become necessary towards the elucidation of plant tolerance responses. By the use of model plant Arabidopsis thaliana this study demonstrated the implication of this polycation on enhancement of anti-oxidative capacity by signaling connections to central hub metabolites for sugar, lipid and amino acid metabolism such as pyruvate or myo-Inositol, as well as its involvement on root morphology. |
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