Arabidopsis ABA Receptor RCAR1/PYL9 Interacts with an R2R3-Type MYB Transcription Factor, AtMYB44

Li, Dekuan; Liu, Ying; Zhang, Liang; Wang, Xiaoyu; Zhao, Zhe; Tao, Zhiwen; Wang, Jianmei; Wang, Jin; Lin, Min; Li, Xufeng; Yang, Yi

doi:10.3390/ijms15058473

Cited by 45 publications

(42 citation statements)

References 43 publications

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“…MYB44 overexpression in Arabidopsis mutants increases drought tolerance by modifying the regulation of stomatal closure (Jung et al, 2008). However, MYB44 also negatively regulates ABA responses (Jaradat et al, 2013;Li et al, 2014) involved in stomatal closure, leaf senescence, and ROS scavenging (Persak and Pitzschke, 2014). In our study, MYB44 expression correlated positively with glycerol levels and negatively with the expression of NOGC1, a nitric oxide-dependent guanylyl cyclase involved in stomatal closure via Ca 2+ signaling (Mulaudzi et al, 2011;Joudoi et al, 2013).…”

Section: Effects Of O 3 Stress On Photosynthesis and Stomatal Regulationmentioning

confidence: 50%

Central Metabolic Responses to Ozone and Herbivory Affect Photosynthesis and Stomatal Closure

et al. 2016

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Plants have evolved adaptive mechanisms that allow them to tolerate a continuous range of abiotic and biotic stressors. Tropospheric ozone (O 3 ), a global anthropogenic pollutant, directly affects living organisms and ecosystems, including plant-herbivore interactions. In this study, we investigate the stress responses of Brassica nigra (wild black mustard) exposed consecutively to O 3 and the specialist herbivore Pieris brassicae. Transcriptomics and metabolomics data were evaluated using multivariate, correlation, and network analyses for the O 3 and herbivory responses. O 3 stress symptoms resembled those of senescence and phosphate starvation, while a sequential shift from O 3 to herbivory induced characteristic plant defense responses, including a decrease in central metabolism, induction of the jasmonic acid/ethylene pathways, and emission of volatiles. Omics network and pathway analyses predicted a link between glycerol and central energy metabolism that influences the osmotic stress response and stomatal closure. Further physiological measurements confirmed that while O 3 stress inhibited photosynthesis and carbon assimilation, sequential herbivory counteracted the initial responses induced by O 3 , resulting in a phenotype similar to that observed after herbivory alone. This study clarifies the consequences of multiple stress interactions on a plant metabolic system and also illustrates how omics data can be integrated to generate new hypotheses in ecology and plant physiology.

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Section: Effects Of O 3 Stress On Photosynthesis and Stomatal Regulationmentioning

confidence: 50%

Central Metabolic Responses to Ozone and Herbivory Affect Photosynthesis and Stomatal Closure

et al. 2016

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“…Interestingly, the ABA receptor, PYL8, was shown to physically interact with both MYB77 and MYB44 and to promote auxinresponsive transcription by MYB77 (Zhao et al, 2014). MYB44 has also been implicated in ABA signaling through direct interaction with an additional ABA receptor, PYL9 (Li et al, 2014), as well as repression of jasmonic acid (JA)-responsive transcription (Jung et al, 2010). These factors have additionally been implicated in salicylic acid (SA) and ethylene signaling (Yanhui et al, 2006;Shim et al, 2013).…”

Section: Identification Of a New Regulatory Module In The Root Hair Cmentioning

confidence: 99%

Profiling of Accessible Chromatin Regions across Multiple Plant Species and Cell Types Reveals Common Gene Regulatory Principles and New Control Modules

et al. 2017

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The transcriptional regulatory structure of plant genomes remains poorly defined relative to animals. It is unclear how many -regulatory elements exist, where these elements lie relative to promoters, and how these features are conserved across plant species. We employed the assay for transposase-accessible chromatin (ATAC-seq) in four plant species (, ,, and ) to delineate open chromatin regions and transcription factor (TF) binding sites across each genome. Despite 10-fold variation in intergenic space among species, the majority of open chromatin regions lie within 3 kb upstream of a transcription start site in all species. We find a common set of four TFs that appear to regulate conserved gene sets in the root tips of all four species, suggesting that TF-gene networks are generally conserved. Comparative ATAC-seq profiling of Arabidopsis root hair and non-hair cell types revealed extensive similarity as well as many cell-type-specific differences. Analyzing TF binding sites in differentially accessible regions identified a MYB-driven regulatory module unique to the hair cell, which appears to control both cell fate regulators and abiotic stress responses. Our analyses revealed common regulatory principles among species and shed light on the mechanisms producing cell-type-specific transcriptomes during development.

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“…An Arabidopsis R2R3-type MYB gene well characterized for its role in the response to different abiotic and biotic stresses is AtMYB44 / AtMYBR1 [ 32 , 70 , 71 , 72 , 73 , 147 , 148 , 149 ]. As already mentioned in Section 2.3 , the overexpression of this TF in Arabidopsis enhances stomatal closure with the consequent increased drought and salinity tolerance of these transgenics compared to wild type and atmyb44 mutant plants [ 32 ].…”

Section: Crosstalk Among Different Stress Responsesmentioning

confidence: 99%

“…Similar microarray results were reported in both papers [ 32 , 72 ], showing that many well-known positive effectors or regulators of stress responses were similarly down-regulated in AtMYB44-overexpressors compared to wild type plants [ 32 , 72 ]. Recently, it was shown that AtMYB44 competes with ABI1 phosphatase, a negative regulator of ABA signaling, for the binding to the RCAR1/PYL9 ABA receptor [ 73 ]. The proposed model suggested that, upon ABA perception, AtMYB44 competes with ABI1 for binding to RCAR1/PYL9, releasing the inhibitory effect of RCAR1/PYL9 on ABI1 activity and thus down-regulating the expression of ABA-responsive genes [ 73 ].…”

Section: Crosstalk Among Different Stress Responsesmentioning

confidence: 99%

Plant MYB Transcription Factors: Their Role in Drought Response Mechanisms

Baldoni

Genga

Cominelli

2015

IJMS

374

243

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Water scarcity is one of the major causes of poor plant performance and limited crop yields worldwide and it is the single most common cause of severe food shortage in developing countries. Several molecular networks involved in stress perception, signal transduction and stress responses in plants have been elucidated so far. Transcription factors are major players in water stress signaling. In recent years, different MYB transcription factors, mainly in Arabidopsis thaliana (L.) Heynh. but also in some crops, have been characterized for their involvement in drought response. For some of them there is evidence supporting a specific role in response to water stress, such as the regulation of stomatal movement, the control of suberin and cuticular waxes synthesis and the regulation of flower development. Moreover, some of these genes have also been characterized for their involvement in other abiotic or biotic stresses, an important feature considering that in nature, plants are often simultaneously subjected to multiple rather than single environmental perturbations. This review summarizes recent studies highlighting the role of the MYB family of transcription factors in the adaptive responses to drought stress. The practical application value of MYBs in crop improvement, such as stress tolerance engineering, is also discussed.

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Arabidopsis ABA Receptor RCAR1/PYL9 Interacts with an R2R3-Type MYB Transcription Factor, AtMYB44

Cited by 45 publications

References 43 publications

Central Metabolic Responses to Ozone and Herbivory Affect Photosynthesis and Stomatal Closure

Central Metabolic Responses to Ozone and Herbivory Affect Photosynthesis and Stomatal Closure

Profiling of Accessible Chromatin Regions across Multiple Plant Species and Cell Types Reveals Common Gene Regulatory Principles and New Control Modules

Plant MYB Transcription Factors: Their Role in Drought Response Mechanisms

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