2013
DOI: 10.1093/jxb/ers361
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The inhibitory effect of ABA on floral transition is mediated by ABI5 in Arabidopsis

Abstract: Seed germination and flowering initiation are both transitions responding to similar seasonal cues. This study shows that ABSCISIC ACID-INSENSITIVE MUTANT 5 (ABI5), a bZIP transcription factor, which plays an important role in the abscisic acid (ABA)-arrested seed germination, is robustly associated with the floral transition in Arabidopsis. Under long-day conditions, overexpression of ABI5 could delay floral transition through upregulating FLOWERING LOCUS C (FLC) expression. In contrast, ectopically overexpre… Show more

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Cited by 233 publications
(220 citation statements)
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“…Consistent with this hypothesis, an ABA biosynthesis knockout mutant, aba1-6, was shown to flower later under LDs (Riboni et al, 2013). External application of ABA also delays flowering (Cheng et al, 2002;Achard et al, 2006;Domagalska et al, 2010;Wang et al, 2013), suggesting a dual effect of ABA on floral transition. Interestingly, drought accelerates flowering of Arabidopsis only under LDs but not SDs.…”
mentioning
confidence: 56%
“…Consistent with this hypothesis, an ABA biosynthesis knockout mutant, aba1-6, was shown to flower later under LDs (Riboni et al, 2013). External application of ABA also delays flowering (Cheng et al, 2002;Achard et al, 2006;Domagalska et al, 2010;Wang et al, 2013), suggesting a dual effect of ABA on floral transition. Interestingly, drought accelerates flowering of Arabidopsis only under LDs but not SDs.…”
mentioning
confidence: 56%
“…ABA has also been reported to be involved in floral transitions (40), raising the question of whether the early flowering observed in lettuce DOG1-RNAi plants and dog1-3 plants overexpressing MIR156 could be caused by the alteration of ABA contents, as mutants in ABA biosynthetic genes have similar seed germination phenotypes as dog1-3 mutant seeds (SI Appendix, Fig. S1 B and E).…”
Section: Dog1mentioning
confidence: 99%
“…The SOM promoter also possesses two ABA-responsive elements (ABREs; Figure 3A), which are known binding sites for group A bZIPs (Choi et al, 2000;Uno et al, 2000;Bensmihen et al, 2002;Carles et al, 2002;Narusaka et al, 2003;Nakashima et al, 2006;Kim et al, 2011;Wang et al, 2013). The presence of these elements prompted us to examine whether ABI3 and ABI5 target the SOM promoter at high temperature to activate SOM expression.…”
Section: Abi3 Abi5 and Dellas Target The Som Promoter In Vivomentioning
confidence: 99%
“…Thus, the increased ABA level observed at high temperature is likely to potentiate the activity of ABI3 as a transcriptional regulator. The activities of group A bZIPs have also been shown to be enhanced by ABA (Hobo et al, 1999;Finkelstein and Lynch, 2000;Gampala et al, 2002;Lopez-Molina et al, 2002;Finkelstein et al, 2005;Nakashima et al, 2006;Reeves et al, 2011;Wang et al, 2013) likely via the phosphorylation of group A bZIPs by the subclass III SUCROSE NONFERMENTING 1-RELATED PROTEIN KINASE2s, which are activated by the PYRABACTIN RESISTANCE/PYR1-LIKE/REGULATORY COMPONENTS OF ABA RECEPTOR-mediated inactivation of group A PROTEIN PHOS-PHATASE 2Cs in the presence of ABA (Furihata et al, 2006;Fujii et al, 2007Fujii et al, , 2009Piskurewicz et al, 2008;Nakashima et al, 2009;Umezawa et al, 2009;Dai et al, 2013;Wang et al, 2013). Thus, the high-temperature-induced increase in ABA levels is likely to enhance the activities of group A bZIPs as transcriptional regulators.…”
Section: Abi3 Abi5 and Dellas Mediate Aba And Ga Signaling To Activmentioning
confidence: 99%