|
Descripción
|
|
|---|---|
| Flooding and submergence are two stresses leading to anoxic conditions in the root system. Under this stress both anoxia and hypoxia are defined by O2 shortage. Flooding negatively prevents O2 influx into the root system, thus reducing oxidative phosphorylation and ATP levels. Flood tolerant higher plant species have adequate plasticity to adjust their anatomy and physiology and allow their growth in aquatic environments, representing an evolutionary challenge. Aerenchyma and adventitious root formation, and elongation of submerged internodes are two acquired mechanisms to avoid and escape the flooding stress. It now seems clear the existence of a conserved flooding response network (FRN) that includes alterations in ethylene (ET)-triggered gene expression. Besides, gibberellins (GAs) are essential components for the effectiveness of this signalling network that is started by entrapped and/or enhanced ET synthesis. On the other hand, for the FRN to take place properly there must be at least two parallel and coupled additional mechanisms to sensitize O2 (i.e. N-end rule pathway and/or NO/nsHbs cycle) and generate ATP and NAD+ from the fermentation pathway. Here, FRN knowledge is updated and revised in depth. | |
|
Internacional
|
Si |
|
DOI
|
10.1002/9781119054450.ch41 |
|
Edición del Libro
|
|
|
Editorial del Libro
|
John Wiley & Sons, Ltd. |
|
ISBN
|
9781119054368 |
|
Serie
|
|
|
Título del Libro
|
Water Stress and Crop Plants: A Sustainable Approach |
|
Desde página
|
711 |
|
Hasta página
|
731 |