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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1016/j.plaphy.2023.107700
|2 doi
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|a pubmed25n1186.xml
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|a (DE-627)NLM355904209
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|a (NLM)37086691
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|a (PII)S0981-9428(23)00211-5
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Huang, Xue-Jing
|e verfasserin
|4 aut
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|a Exogenous γ-aminobutyric acid (GABA) alleviates nitrogen deficiency by mediating nitrate uptake and assimilation in Andrographis paniculata seedlings
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 08.05.2023
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|a Date Revised 08.05.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2023 Elsevier Masson SAS. All rights reserved.
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|a γ-Aminobutyric acid (GABA) plays significant metabolic and signaling roles in plant stress responses. Recent studies have proposed that GABA alleviates plant nitrogen (N) deficient stress; however, the mechanism by which GABA mediates plant N deficiency adaptation remains not yet well understood. Herein we found in a medicinal plant Andrographis paniculata that 5 mmol L-1 exogenous GABA promoted plant growth under N deficient (1 mmol L-1 NO3-) condition, with remarkably increments in total N and NO3- concentrations in plants. GABA increased N assimilation and protein synthesis by up-regulating the activities and expression of N metabolic enzymes. GABA also increased the accumulation of α-ketoglutarate and malate, which could facilitate the assimilation of NO3-. Inhibition of NR by Na2WO4 counteracted the promoting effects of GABA on plant growth, and the effects of GABA were not affected by L-DABA and 3-MP, the inhibitors of GABA transaminase (GABA-T) and glutamate decarboxylase (GAD), respectively. These results suggested that the nutritional role of GABA was excluded in promoting plant growth under low N condition. The results of 15N isotopic tracing and NRTs transcription indicated that exogenous GABA could up-regulate NRT2.4 and NRT3.2 to increase plant NO3- uptake under N deficient condition. Interestingly, primidone, an inhibitor of GABA receptor, impeded the effects of GABA on plant growth and N accumulation. Thus, our results revealed that exogenous GABA acted as a signal to up-regulate NRTs via its receptor to increase NO3- uptake, and subsequently promoted NO3- assimilation to alleviate N deficiency in A. paniculata
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|a Journal Article
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|a Andrographis paniculata
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|a Nitrate transporters
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|a Nitrate uptake
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|a Nitrogen deficient stress
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|a γ-Aminobutyric acid
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|a Nitrates
|2 NLM
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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| 650 |
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|a gamma-Aminobutyric Acid
|2 NLM
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| 650 |
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|a 56-12-2
|2 NLM
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| 700 |
1 |
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|a Jian, Shao-Fen
|e verfasserin
|4 aut
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| 700 |
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|a Wan, Si
|e verfasserin
|4 aut
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| 700 |
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|a Miao, Jian-Hua
|e verfasserin
|4 aut
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| 700 |
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|a Zhong, Chu
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant physiology and biochemistry : PPB
|d 1991
|g 198(2023) vom: 01. Mai, Seite 107700
|w (DE-627)NLM098178261
|x 1873-2690
|7 nnas
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| 773 |
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|g volume:198
|g year:2023
|g day:01
|g month:05
|g pages:107700
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|u http://dx.doi.org/10.1016/j.plaphy.2023.107700
|3 Volltext
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