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- Title
Changes in RACK1 expression induce defects in nodulation and development in Phaseolus vulgaris.
- Authors
Islas-Flores, Tania; Guillén, Gabriel; Sánchez, Federico; Villanueva, Marco A
- Abstract
RACK1 is a scaffold protein with the ability to interact in a regulated manner with a diverse number of ligands from distinct signal-transduction pathways. This assessment allowed us to infer that it may be involved in different processes such as nodulation. In a recent study we showed by silencing, that PvRACK1 has a pivotal role in cell expansion and in symbiosome and bacteroid integrity during nodule development in Phaseolus vulgaris. On the other hand, we have also observed that its over-expression provokes a dramatic phenotype in: (a) seedlings that have been exposed to heat, in which systemic necrosis is induced; and (b) in Agrobacterium rhizogenes-transformed roots, where nodulation is strongly inhibited and nodules show early senescent symptoms. These findings indicate that PvRACK1 may be an integrator of diverse signal-transduction pathways in processes as varied as nodulation, cell expansion, heat stress responses, and systemic activation of necrosis.
- Publication
Plant signaling & behavior, 2012, Vol 7, Issue 1, p132
- ISSN
1559-2324
- Publication type
Journal Article
- DOI
10.4161/psb.7.1.18485