Together, these data suggest that ATHB5 acts as a regulator of seed germination and postgerminative growth downstream of ABI3 and ABI5 in an ABA
ABI5 interacts with PIF1, and promotes its binding on the common target genes of PIF1 and ABI5, possibly including ABI5 itself. ABA‐mediated inhibition of post‐germination development in enhanced by CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1), which promotes the binding of ABI5 protein on its downstream target genes. We then measured ABI5 protein levels in seeds that were treated with ABA for 48 h. Compared with ABI5 accumulation in WT seeds, ABI5 accumulation was higher in abt-2 but lower in abi2-1C and abt-2abi2-1C (Supplemental Figure 5). These ABI5 levels were consistent with the ABA-sensitivity phenotypes of these lines. 2020-11-07 ABA Insensitive 5 (ABI5) is a basic leucine zipper transcription factor that plays a key role in the regulation of seed germination and early seedling growth in the presence of ABA and abiotic stresses.
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. 2019-08-09 · ABF3 and ABI5 are Group A bZIP TFs that are known to be important in abscisic acid (ABA) signaling. However, questions of whether ABF3 regulates ABI5 are still present. In vitro kinase assay results showed that Thr-128, Ser-134, and Thr-451 of ABF3 are calcium-dependent protein kinase phosphorylation sites.
In wild‐type Arabidopsis plants, ABI3 expression and activity parallel those described for ABI5 following 2016-09-14 · Furthermore, 35S:ABI5 dramatically attenuated or abolished the ABA insensitivity of nf-ycT and rgl2, while abi5 35S:NF-YC9 still remained high testa and endosperm rupture rates as abi5. In abi5–4 plants, ABI5(K391R ) expression caused greater ABA hypersensitivity (gene expression, seed germination arrest and primary root growth inhibition) compared with 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.
The arrested, germinated embryos remain viable but quiescent, and osmotolerant as long as ABA … Disruption of ABI5 increases Arabidopsis ABA‐insensitivity and decreases the expression of many ABA‐responsive genes (Finkelstein and Lynch, 2000b), whereas ABI5‐overexpressing plants were hypersensitive to ABA during seed germination and early seedling development (Lopez‐Molina et al., … 2000-04-01 abi5 was characterized as ABA insensitive in comparison to the wild type during seed germination. The mutation was mapped on 2 chromosome (Finkelstein,1994). Transcriptomic analysis of abi5 mutant indicated the lower level of expression of stress responsive genes.
ABI5 Encodes a Basic Leucine Zipper Transcription Factor Ruth R. Finkelstein 1 and Tim J. Lynch Department of Molecular, Cellular and Developmental Biology, University of California–Santa Barbara, Santa Barbara, California 93106 The Arabidopsis abscisic acid (ABA)–insensitive abi5 mutants have pleiotropic defects in ABA response, including de-
BIN2 phosphorylates and stabilizes ABI5 to mediate Abscisic acid (ABA) response during seed germination, Ubiquitinated.
abi5 was characterized as ABA insensitive in comparison to the wild type during seed germination.
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ABA INSENSITIVE 5 (ABI5) is a basic leucine zipper (bZIP) transcription factor which acts in the abscisic acid (ABA) network and is activated in response to abiotic stresses. However, the precise role of barley (Hordeum vulgare) ABI5 in ABA signaling and its function under stress remains elusive. Here, we show that HvABI5 is involved in ABA-dependent regulation of barley response to drought
The Arabidopsis abscisic acid response gene ABI5 encodes a basic leucine zipper transcription factor.
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Removal of ABA results in the rapid degradation of ABI5 and the expression of ABI5 is strongly induced by exogenous ABA or diverse abiotic stresses, including salt and drought (Lopez‐Molina et al., 2001, 2002; Shu et al., 2013; Skubacz et al., 2016). 2013-01-09 Background ABI5 (abscisic acid insensitive 5) is involved in ABA-regulated gene expression during seed development and subsequent vegetative stage and acts as the major mediator of ABA repression of growth. Binds to the embryo specification element and the ABA-responsive element (ABRE) of the Dc3 gene promoter and to the ABRE of the Em1 and Em6 genes promoters. The accumulated ABI5 protein further shows heteromeric interaction with HY5, and thus synergistically activates its own expression.
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regulation of ABI5 expression represents an integration of light and ABA signaling during seed germination and early seedling development. Accumulating evidence indicates that BBX proteins work in concert with HY5 in regulating photomorphogenesis [14–17,20]. Since HY5 directly activates ABI5 expression, it is interesting to investigate whether BBX proteins are also involved in ABA signaling.
Here, we report the functional identification of rice ( Oryza sativa ) ABI5-Like1 (ABL1 ABA INSENSITIVE 5 (ABI5) is a basic leucine zipper (bZIP) transcription factor which acts in the abscisic acid (ABA) network and is activated in response to abiotic stresses. However, the precise role of barley (Hordeum vulgare) ABI5 in ABA signaling and its function under stress remains elusive. Here, we show that HvABI5 is involved in ABA-dependent regulation of barley response to drought Like ABI5, ABI five binding protein (AFP) mRNA and protein levels are induced by ABA during seed germination. Two different afp mutant alleles (afp-1 and Expression of ABA signalling genes and ABI5 protein levels in imbibed. Sorghum bicolor caryopses with contrasting dormancy and at different developmental 2 Feb 2021 ABA negatively regulates seed germination, post-germination growth and floral of AtMPK3 through ABI5, a master regulator of ABA signaling.