ABI5 is a key component in ABA-triggered pathways during germination, seedling establishment, and vegetative growth (Lopez-Molina et al., 2001); in addition, it has been reported to play certain roles in nitrogen assimilation and signaling (Signora et al., 2001).

33. t)an fattabe f)onom @aba; beraf ^etcr btn ftaben SBerSaba än i bag. 34. Sorbo tatbe intifl ®abi5 flägte, fem od) fl)ratio tufcnb, fejc^unbrab femtio. 26.

Whether ABI3 is also a direct regulator of ABI5 awaits further investigation. Together, the ABI5 promoter may represent a converging point on which the transcriptional regulators of light and ABA signaling pathways integrate the signals of both pathways by fine-tuning ABI5 expression. The Arabidopsis abscisic acid (ABA)–insensitive abi5 mutants have pleiotropic defects in ABA response, including decreased sensitivity to ABA inhibition of germination and altered expression of some ABA-regulated genes. ABA Stabilizes ABI5. Given the strong ABA-dependent ABI5 protein accumulation, we were interested to determine whether ABI5 protein stability is altered in the presence of ABA. For this purpose we generated WT/35S∷HA-ABI5 transgenic lines constitutively expressing HA-ABI5 transcript.

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The Arabidopsis abscisic acid (ABA)-insensitive abi5 mutants have pleiotropic defects in ABA response, including decreased sensitivity to ABA inhibition of germination and altered expression of some ABA-regulated genes. The constitutive expression of ABI5 prevented the growth arrest of ppc2 under low CO2 conditions. These findings demonstrate that PPC2 plays an important role in the acclimation of Arabidopsis plants to low CO2 availability by linking photorespiratory metabolism to primary metabolism, and that this is mediated, at least in part, through ABA and ABI5 accumulation is induced by ABA only within a short interval of about 60 h following stratification, during which ABA and ABA‐dependent ABI5 activity are essential to initiate growth arrest of germinated embryos. The arrested, germinated embryos remain viable but quiescent, and osmotolerant as long as ABA is present.

Dongqing Xu, Jigang Li, Sreeramaiah N Gangappa et al.

Tidigare arbete har visat att i vilande frön fröskalet syntetiserar och frigör ABA mot seed germination by stimulating abscisic acid synthesis and ABI5 activity.

Sumoylated at Lys-391 by SIZ1. Sumoylation protects ABI5 from proteasome degradation, attenuating ABA signaling and sensitivity to ABA. 1 Publication Comparison of seed and ABA-inducible vegetative gene expression in wild-type and abi5-1 plants indicates that ABI5 regulates a subset of late embryogenesis-abundant genes during both developmental stages. Responsible for reducing cadmium uptake, mediated by interaction with MYB49 . The Arabidopsis abscisic acid (ABA)-insensitive abi5 mutants have pleiotropic defects in ABA response, including decreased sensitivity to ABA inhibition of germination and altered expression of some ABA-regulated genes.

Although ABI5 is generally recognized as a transcription factor that functions in the nucleus, it interacts with RING type E3 ubiquitin ligase KEG, which is localized 

RESULTS ABA-Jhsensitive (ABI)4 and ABIS, have been identi- fied by mutation. The abi4 and abi5 mutants were characterized in terms of ABA sensitivity of seed ger- mination, dormancy, seed-specific gene expression and stomatal regulation. Their phenotypes are similar to mutations in ABI3, which is thought to encode a 2019-12-02 · Since XIW1 affects ABI5 protein abundance, and both XIW1 and ABI5 are located in the nucleus in the presence of ABA, we wondered whether there is a direct interaction between XIW1 and ABI5.

Moreover, ABI5 also acts as an ABA and other phytohormone signaling integrator. Components of auxin, cytokinin, gibberellic acid, jasmonate and brassinosteroid signaling and metabolism pathways were shown to take part in ABI5 regulation and/or to be regulated by ABI5.
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ABI5 HY5 Light ABA BBX21 ABI5 PYR/PYL/RCAR PP2C SnRK2 COP1 FHY3 DET1 +1 HRB2 HDA6 ABI5 ABI5 HRB2 HDA6 DDA1 ABA-response genes PIF1,3,4,5 PIF1,3,4,5 Fig.1 A model showing molecular interactions between light and abscisic acid (ABA) signalling pathways during … The Arabidopsis abscisic acid (ABA)-insensitive abi5 mutants have pleiotropic defects in ABA response, including decreased sensitivity to ABA inhibition of germination … 2019-08-09 2015-03-20 2018-02-20 negative regulator of ABA signaling that promotes ABI5 degradation during seed germination. Over-expression of AFP1 enhances tolerance to ABA and reduces ABI5 accumulation, whereas afp1 mutants are sensitive to ABA and have high levels of ABI5 (Lopez-Molinaetal.,2003).TherearethreeAFP1homologs(i.e. AFP2, AFP3, and AFP4) in the Arabidopsis genome, 2001-04-10 Comparison of seed and ABA-inducible vegetative gene expression in wild-type and abi5-1 plants indicates that ABI5 regulates a subset of late embryogenesis-abundant genes during both developmental stages.

34. Sorbo tatbe intifl ®abi5 flägte, fem od) fl)ratio tufcnb, fejc^unbrab femtio. 26. PASTABA.
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The Arabidopsis abscisic acid response gene ABI5 encodes a basic leucine zipper transcription factor. The Arabidopsis abscisic acid (ABA)-insensitive abi5 mutants have pleiotropic defects in ABA response, including decreased sensitivity to ABA inhibition of germination and altered expression of some ABA-regulated genes.

mutants, the abi5-1 mutants had lower photosynthetic rates and Fv/Fm compared to the wild type under photorespiratory conditions i.e.