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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1016/j.plantsci.2021.110983
|2 doi
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|a pubmed25n1095.xml
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|a (DE-627)NLM32860304X
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|a (NLM)34315599
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|a (PII)S0168-9452(21)00179-5
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Li, Xinmei
|e verfasserin
|4 aut
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| 245 |
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|a AtMYB32 regulates the ABA response by targeting ABI3, ABI4 and ABI5 and the drought response by targeting CBF4 in Arabidopsis
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|c 2021
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 05.08.2021
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|a Date Revised 05.08.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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| 520 |
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|a Copyright © 2021 Elsevier B.V. All rights reserved.
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|a The Arabidopsis thaliana R2R3-MYB transcription factor AtMYB32 and its homologs AtMYB4 and AtMYB7 play crucial roles in the regulation of phenylpropanoid metabolism. In addition, AtMYB4 and AtMYB7 are involved in the response to abiotic stress. However, the function of AtMYB32 remains unclear. In this study, we found that AtMYB32 is induced by abscisic acid (ABA) and repressed by drought stress. AtMYB32 positively regulates ABA-mediated seed germination and early seedling development. The expression of ABSCISIC ACID-INSENSITIVE 3 (ABI3), ABI4 and ABI5, which encode key positive regulators of ABA signaling, was upregulated in response to ABA in AtMYB32-overexpressing plants and downregulated in the atmyb32-1 mutant. In addition, we found that the atmyb32-1 mutant was drought resistant. Consistent with the drought-resistant phenotype, the transcript levels of C-repeat binding factor 4 (CBF4) were higher in the atmyb32-1 mutant in response to drought stress. Electrophoretic mobility shift assays (EMSAs) and chromatin immunoprecipitation (ChIP) assays revealed that AtMYB32 binds directly to the ABI3, ABI4, ABI5 and CBF4 promoters both in vitro and in vivo. Genetically, ABI4 was found to be epistatic to AtMYB32 for ABA-induced inhibition of seed germination and early seedling development. Taken together, our findings revealed that AtMYB32 regulates the ABA response by directly promoting ABI3, ABI4 and ABI5 expression and that the drought stress response likely occurs because of repression of CBF4 expression
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|a Journal Article
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|a Abscisic acid (ABA)
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|a AtMYB32
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|a C-repeat binding factor 4 (CBF4)
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|a Drought stress
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|a Seed germination
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|a ABI3 protein, Arabidopsis
|2 NLM
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| 650 |
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|a ABI4 protein, Arabidopsis
|2 NLM
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| 650 |
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|a ABI5 protein, Arabidopsis
|2 NLM
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| 650 |
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|a Arabidopsis Proteins
|2 NLM
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| 650 |
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|a Basic-Leucine Zipper Transcription Factors
|2 NLM
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| 650 |
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|a CBF4 protein, Arabidopsis
|2 NLM
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| 650 |
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|a Trans-Activators
|2 NLM
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| 650 |
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|a Transcription Factors
|2 NLM
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| 650 |
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|a Abscisic Acid
|2 NLM
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| 650 |
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7 |
|a 72S9A8J5GW
|2 NLM
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| 700 |
1 |
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|a Zhong, Ming
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Qu, Lina
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Jiaxin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Xueqing
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Qiang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Xuanming
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Xiaoying
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Plant science : an international journal of experimental plant biology
|d 1985
|g 310(2021) vom: 15. Sept., Seite 110983
|w (DE-627)NLM098174193
|x 1873-2259
|7 nnas
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| 773 |
1 |
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|g volume:310
|g year:2021
|g day:15
|g month:09
|g pages:110983
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|u http://dx.doi.org/10.1016/j.plantsci.2021.110983
|3 Volltext
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|d 310
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