Abstract
The expression of FOA1 (F-box overexpressed/oppressed ABA signaling) in different organs of Arabidopsis, and in response to ABA and NaCl, was analyzed. The expression level of FOA1 is higher in the root and is lower in the stem, and is induced rapidly by ABA and NaCl. The phenotypes of T-DNA insertion mutant foa1 and FOA1 overexpression lines FOA1ox1 and FOA1ox2 were analyzed. The foa1 mutant exhibited a lower germination rate, shorter root length, more stomatal opening, increased proline accumulation and hypersensitivity to ABA compared with the wild type. In contrast, the overexpression lines showed lower sensitivity to ABA than the wild type. The expression levels of several ABA and stress-responsive transcription factors and genes were altered in the foa1 mutant in response to ABA. Compared with the wild type, the expression levels of ABA-responsive transcription factors were higher, but ABA and stress-responsive genes were lower in foa1 mutant. This study demonstrates that FOA1 is an ABA signaling-related gene, and may play a negative role in ABA signaling.
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Peng, J., Yu, D., Wang, L. et al. Arabidopsis F-box gene FOA1 involved in ABA signaling. Sci. China Life Sci. 55, 497–506 (2012). https://doi.org/10.1007/s11427-012-4332-9
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DOI: https://doi.org/10.1007/s11427-012-4332-9