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News on ABA transport, protein degradation and ABFs/WRKYs in ABA signaling

AutorAntoni, Regina ; Rodríguez, Lesia ; González-Guzmán, Miguel; Pizzio, Gastón A.; Rodríguez, Pedro L.
Palabras claveChelatase H-subunit
Abscisic-acid receptor
Finger E3 Ligase
Transcription factor
Fecha de publicaciónoct-2011
EditorElsevier
CitaciónCurrent Opinion in Plant Biology 14/5:547-553 (2011)
ResumenThe recent identification of abscisic acid (ABA) transporters provides an important insight into the delivery of ABA from the vascular system and its uptake by target cells. A putative connection with PYR/PYL receptors is envisaged, linking ABA uptake and intracellular perception by a fast and efficient mechanism. Downstream signaling of the core pathway involves regulation of ABA-responsive element binding factors (ABFs/AREBs) through phosphorylation, ubiquitination and sumoylation in the case of ABI5. Several E3 ligases appear to regulate ABA signaling either positively or negatively, although relatively few targets are known yet. ABFs/AREBs are themselves subjected to transcriptional regulation, and some transcription factors harboring the WRKY domain (WRKYs) appear to regulate their expression through W-box sequences present in the promoters of ABFs/AREBs.
URIhttp://hdl.handle.net/10261/48584
DOI10.1016/j.pbi.2011.06.004
E-ISSN1369-5266
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