title: Arabidopsis F-box gene FOA1 involved in ABA signaling.
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.
authors: College of Life Sciences, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.
authors: Juan
authors: J
authors: Peng
authors: Dashi
authors: D
authors: Yu
authors: Liqun
authors: L
authors: Wang
authors: Minmin
authors: M
authors: Xie
authors: Congying
authors: C
authors: Yuan
authors: Yu
authors: Y
authors: Wang
authors: Dongying
authors: D
authors: Tang
authors: Xiaoying
authors: X
authors: Zhao
authors: Xuanming
authors: X
authors: Liu
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology*; D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D004269:DNA, Bacterial / Q000235:genetics; D044783:F-Box Proteins / Q000235:genetics* / Q000378:metabolism; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant / Q000187:drug effects*; D018525:Germination / Q000187:drug effects / Q000235:genetics; D009154:Mutation; D010937:Plant Growth Regulators / Q000494:pharmacology; D018517:Plant Roots / Q000235:genetics / Q000378:metabolism; D054046:Plant Stomata / Q000187:drug effects / Q000235:genetics / Q000378:metabolism; D030821:Plants, Genetically Modified; D011392:Proline / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015398:Signal Transduction / Q000235:genetics; D012965:Sodium Chloride / Q000494:pharmacology; D013997:Time Factors; D014867:Water / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; D004269:DNA, Bacterial; D044783:F-Box Proteins; C575917:FOA1 protein, Arabidopsis; D010937:Plant Growth Regulators; C036483:T-DNA; D014867:Water; D012965:Sodium Chloride; D000040:Abscisic Acid; D011392:Proline