期刊
CURRENT OPINION IN PLANT BIOLOGY
卷 14, 期 5, 页码 547-553出版社
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2011.06.004
关键词
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资金
- Ministerio de Educacion y Ciencia
- Fondo Europeo de Desarrollo Regional [BIO2008-00221]
The 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 (TFs) harboring the WRKY domain (WRKYs) appear to regulate their expression through W-box sequences present in the promoters of ABFs/AREBs.
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