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

2017-12-01

These observations indicate that ABI5 is epistatic to PIFs in mediating hypocotyl-negative gravitropism and ABA signaling in darkness. In addition, ABI5 was shown to directly activate its own expression, whereas BBX21 negatively regulates this activity by directly interacting with ABI5. Together, our study indicates that BBX21 coordinates with HY5 and ABI5 on the ABI5 promoter and that these transcriptional regulators work in concert to integrate light and ABA signaling in Arabidopsis thaliana. 2020-09-07 · 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.

Abi5 aba

ABA negatively mediates seed size by inﬂuencing the timing of endosperm cellularization. Furthermore, we demonstrated that the ABA signaling component ABI5 directly binds to the pro-moter region of SHB1 during early seed development. Our re-sults thus showed that ABA regulates early seed development by ABI5-regulated SHB1 expression. 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.

ABI5 is tightly controlled by the core ABA signaling components and many other regulators. 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).

This ABA‐mediated developmental checkpoint requires the bZIP transcription factor ABI5. Here, we used abi3‐1, which is also unable to execute this checkpoint, to investigate the relative role of ABI3 and ABI5 in this process. In wild‐type Arabidopsis plants, ABI3 expression and activity parallel those described for ABI5 following

RESULTS 2020-09-07 2020-03-02 Beyond germination, ABA further inhibits postgermination seedling development, which is often mediated by the transcription factor ABSCISIC ACID INSENSTIVE5 (ABI5) (Chen et al., 2020). Recent investigations have unravelled the importance of light–ABA interactions in postgermination development and environmental adaptability of seedlings. However, ABI5 was found to modulate the PYL11‐ and PYL12‐mediated ABA response. In the abi5‐7 mutant, ABA hypersensitivity caused by PYL11 and PYL12 overexpression was totally or partially blocked.

ABI5 is a basic leucine zipper (bZIP) TF that plays a crucial role in ABA signaling-mediated seed germination, chlorophyll catabolism, leaf senescence, and abiotic stress adaptation (Kanai et al., 2010; Sakuraba et al., 2014; Skubacz et al., 2016; Zhao et al., 2020).

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 ABI5 is a basic leucine zipper (bZIP) TF that plays a crucial role in ABA signaling-mediated seed germination, chlorophyll catabolism, leaf senescence, and abiotic stress adaptation (Kanai et al., 2010; Sakuraba et al., 2014; Skubacz et al., 2016; Zhao et al., 2020).

Our re-sults thus showed that ABA regulates early seed development by ABI5-regulated SHB1 expression. RESULTS 2020-09-07 2020-03-02 Beyond germination, ABA further inhibits postgermination seedling development, which is often mediated by the transcription factor ABSCISIC ACID INSENSTIVE5 (ABI5) (Chen et al., 2020).
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Here, we report the functional identification of rice (Oryza sativa) ABI5-Like1 (ABL1), which is a basic region/leucine zipper motif transcription factor. However, ABI5 was found to modulate the PYL11‐ and PYL12‐mediated ABA response. In the abi5‐7 mutant, ABA hypersensitivity caused by PYL11 and PYL12 overexpression was totally or partially blocked.

Their phenotypes are similar to mutations in ABI3, which is thought to encode a 2018-02-20 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 . … abi5 was characterized as ABA insensitive in comparison to the wild type during seed germination. The mutation was mapped on 2 chromosome (Finkelstein,1994).
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ABA-insensitive mutants such as abi4 and abi5 and ABA-deficient mutants were shown to be less sensitive to the inhibitory effects of high nitrate medium on lateral root formation (Signora et al., 2001). Further studies are needed to determine the physiological function of the ABA pathway in mediating nitrogen availability and disrupted C/N stress.

ABI5. A. thaliana (Columbia). GIA1, F2H17.12, F2H17_12, AT2G36270, ABA INSENSITIVE 5, GROWTH-INSENSITIVITY TO ABA more, protein abscisic The Arabidopsis DELAY OF GERMINATION 1 gene affects ABSCISIC ACID INSENSITIVE 5 (ABI5) expression and genetically interacts with ABI3 during Andra med liknande namn.