Abscisic Acid Does Not Disrupt Either the Arabidopsis FCA–FY Interaction or its Rice Counterpart in vitro

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We examined the effect of (+)-ABA on the in vitro interaction of rice FCA and FY homologs, OsFCA and OsFY. From this analysis, we found no disruption of the OsFCA–OsFY complexes by ABA treatment. This result prompted us to examine the effect of ABA on the FCA–FY interaction. In these experiments, we could not reproduce the inhibitory effect of (+)-ABA on the interaction between FCA and FY. Based on these combined results, we believe that the inhibitory effect of (+)-ABA on the FCA–FY interaction should be cautiously reconsidered.

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