2013-01-09

2020-03-24

ABI5 modulates seed germination via feedback regulation of the expression of the PYR/PYL/RCAR ABA receptor genes. As abscisic acid (ABA) receptors, PYR1/PYL/RCAR (PYLs) play important roles in ABA-mediated seed germination, but the regulation of PYLs in this process, especially at the transcriptional level, remains unclear. This postgermination developmental checkpoint is signaled by the stress hormone abscisic acid (ABA), which induces the expression of the bZIP transcription activator ABI5. The growth arrest efficiency depends on ABI5 levels, and abi5 mutants are ABA-insensitive and unable to execute the ABA-mediated growth arrest. 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). Studies have identified the key components of ABA signaling in Arabidopsis (Arabidopsis thaliana), some of which regulate ABA responses by the transcriptional regulation of downstream genes.

Abi5 aba

Författare. Dongqing Xu | Institutionen för biologi ABI5 (abscisic acid insensitive 5) is involved in ABA-regulated gene expression during seed development and subsequent vegetative stage and acts as the Further, we used a genetic approach taking advantage of the weak aba insensitive genes which are affected by DOG1 partly via control of ABI5 expression. av E Henriksson · 2004 · Citerat av 6 — The other cloned ABA insensitive loci, ABI3, ABI4 and ABI5, encode transcription factors of the. B3-, APETALA2- (AP2), and basic leucine zipper (bZIP) domain in the crosstalk between light and abscisic acid (ABA) network, and identified or ABA INSENSITIVE 5 (ABI5), thereby interfering with HY5 or ABI5 binding to Convergence of light and ABA signaling on the ABI5 promoter. D Xu, J Li, SN Gangappa, C Hettiarachchi, F Lin, MX Andersson, Y Jiang, PLoS Genet 10 (2), Convergence of Light and ABA signaling on the ABI5 promoter. Dongqing Xu, Jigang Li, Sreeramaiah N Gangappa et al. PLoS Genetics.

This postgermination developmental checkpoint is signaled by the stress hormone abscisic acid (ABA), which induces the expression of the bZIP transcription activator ABI5. The growth arrest efficiency depends on ABI5 levels, and abi5 mutants are ABA-insensitive and unable to execute the ABA-mediated growth arrest.

These ABI5 levels were consistent with the ABA-sensitivity phenotypes of these lines. 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 III. ABA puts a brake on light-induced greening of seedlings 765 IV. ABA modulates seedling adaptation to shade and high light 766 V. Concluding remarks 768 Acknowledgements 768 References 768 New Phytologist (2021) 229: 763–769 doi: 10.1111/nph.16963 Keywords: abscisicacid(ABA),abioticstress, ABI5, COP1, HY5, light signalling, The accumulated ABI5 protein further shows heteromeric interaction with HY5, and thus synergistically activates its own expression. Our findings reveal a novel transcriptional switch, composed of JMJ17–WRKY40 and HY5–ABI5 modules, which regulates the ABA response during seed germination and seedling development in Arabidopsis. Se hela listan på frontiersin.org regulation of ABI5 expression represents an integration of light and ABA signaling during seed germination and early seedling development.

Ubiquitinated. AFP1, KEG and RPN10 mediate its proteasome-dependent degradation. Its stability or degradation plays a central role in abscisic acid response. Sumoylated at Lys-391 by SIZ1. Sumoylation protects ABI5 from proteasome degradation, attenuating ABA signaling and sensitivity to ABA…

DREB2 belongs to the DRE BINDING mutantes con hipersensibilidad al ABA. En plántulas de la línea mutante y sobreexpresora se analizó el transcrito de los factores de transcripción ABI3 y ABI5, Post-translational modifications (PTMs) such as phosphorylation, ubiquitination, and sumoylation play significant roles in regulating abscisic acid (ABA) Using transient gene expression in rice protoplasts, we provide evidence for the functional interactions of ABI5 with ABA signaling effectors VP1 (viviparous 1) 16 Dec 2016 ABA Insensitive 5 (ABI5) is a basic leucine zipper transcription factor that plays a key role in the regulation of seed germination and early 11 Dec 2013 By contrast, LCR expression is depressed by ABA. Expressions of ABA- and stress-responsive genes, ABI3, ABI4, ABI5, ABF3, and ABF4 are 22 Jul 2009 Like ABI5, ABI3 is also required for the ABA-dependent postgermination growth arrest [15]. However, ABI3 acts upstream of ABI5 and is essential 27 Nov 2012 insensitive to ABA in seed germination, in addition to having an earlier flowering phenotype. Direct binding of ABI5 to the ABRE/G-box promoter El acaricida insecticida Mamboretá ABA es de origen natural y actúa por contacto directo e ingestión y es de movimiento translaminar.

abi5–4 suppressed ABA hypersensitivity caused by siz1 (siz1–2 abi5–4), demonstrating an epistatic genetic inter-action between SIZ1 and ABI5. A K391R substitution in ABI5 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. Yeast two-hybrid assays showed that XIW1 directly interacts with ABI5 through its WD40 domains ( Figure 7 A ). 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, ABA-Jhsensitive (ABI)4 and ABIS, have been identi- fied by mutation.
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By contrast, ABI5 regulates the expression of PYL11 and PYL12 by directly binding to their promoters.
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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

Monocot orthologs of AtABI5 have been identified. Ubiquitinated. AFP1, KEG and RPN10 mediate its proteasome-dependent degradation. Its stability or degradation plays a central role in abscisic acid response. Sumoylated at Lys-391 by SIZ1.