mutants, the abi5-1 mutants had lower photosynthetic rates and Fv/Fm compared to the wild type under photorespiratory conditions i.e. low CO2 availability. However, the growth of these mutants was similar to the wild type under non-photorespiratory (low O2) conditions. The constitutive expression of ABI5

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 . Chromosome : 2: Locus

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 (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 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.

ABI5 functions in the core ABA signaling, which is composed of PYR/PYL/RCAR receptors, PP2C phosphatases and SnRK2 kinases, through the 2018-02-20 · ABA induces a number of effectors, including the bZIP transcription factor ABA INSENSITIVE5 (ABI5). ABI5 accumulates during seed maturation and in dry seeds [19, 20]. During the normal course of seed germination, ABA and concomitantly ABI5 levels rapidly decline following imbibition and GA biosynthesis, enabling seed germination. 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. Together, these results establish that SIZ1-dependent sumoylation of ABI5 attenuates ABA signaling.

29 May 2020 Without ABA treatment the expression analysis of stress-responsive genes showed that the expressions of ABI3 and ABI5 were lower in CKB3 T-

By contrast, ABI5 regulates the expression of PYL11 and PYL12 by directly binding to their promoters. Moreover, the expression of eight other PYLs is also affected during the germination of abi5 mutants. 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. ABI5 functions upstream of miR156 to promote juvenile development by affecting the expression of genes in the miR156-SPL pathway.

2013-01-18

Here, we report the functional identification of rice (Oryza sativa) ABI5-Like1 (ABL1), which is a basic region/leucine zipper motif transcription factor.

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.
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ABA negatively mediates seed size by inﬂuencing the timing of endosperm cellularization.

The previously Arabidopsis, polyclonal, antibody, ABI5, ABA INSENSITIVE 5, GIA1, GROWTH-INSENSITIVITY TO ABA 1, Dc3 promoter-binding factor 1, AtDPBF1, GROWTH-INSENSITIVITY TO ABA 1, bZIP transcription factor 39, AtbZIP39 regulation of ABI5 expression represents an integration of light and ABA signaling during seed germination and early seedling development.
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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., …

In vitro kinase assay results showed that Thr-128, Ser-134, and Thr-451 of ABF3 are calcium-dependent protein kinase phosphorylation sites. 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. 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.