Journal
PLANT SIGNALING & BEHAVIOR
Volume 9, Issue 11, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/15592316.2014.972899
Keywords
ABA receptor; ABA signaling; cytosol-nucleus dual-localization; Mg-chelatase H subunit; pentatricopeptide repeat (PPR) protein
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Funding
- National Key Basic Research Program of China [2012CB114300-002]
- National Natural Science Foundation of China [31200213, 31170268]
- Ministry of Agriculture of China [2013ZX08009003]
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SOAR1 is a cytosol-nucleus dual-localized pentatricopeptide repeat (PPR) protein, which we indentified recently as a crucial regulator in the CHLH/ABAR (Mg-chelatase H subunit /putative ABA receptor)-mediated signaling pathway, acting downstream of CHLH/ABAR and upstream of a nuclear ABA-responsive bZIP transcription factor ABI5. Downregulation and upregulation of SOAR1 expression alter dramatically both ABA sensitivity and expression of a subset of key, nuclear ABA-responsive genes, suggesting that SOAR1 is a hub for ABA signaling to the nucleus, and CHLH/ABAR mediates a central signaling pathway to regulate downstream gene expression through SOAR1.
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