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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1016/j.plantsci.2019.110383
|2 doi
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|a pubmed24n1020.xml
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|a (DE-627)NLM306010410
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|a (NLM)32005388
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|a (PII)S0168-9452(19)31556-0
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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 Schulze, Joachim
|e verfasserin
|4 aut
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| 245 |
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|a Ammonium acts systemically while nitrate exerts an additional local effect on Medicago truncatula nodules
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|c 2020
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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 31.08.2020
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2019 Elsevier B.V. All rights reserved.
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|a Symbiotic nitrogen fixation (SNF) has a high energetic cost for legume plants; legumes thus reduce SNF when soil N is available. The present study aimed to increase our understanding regarding the impacts of the two principal forms of available N in soils (ammonium and nitrate) on SNF. We continuously measured the SNF of Medicago truncatula under controlled conditions. This permitted nodule sampling for comparative transcriptome profiling at points connected to the nodules' reaction following ammonium or nitrate applications. The N component of both ions systemically induced a rhythmic pattern of SNF, while the activity in control plants remained constant. This rhythmic activity reduced the per-day SNF. The nitrate ion had additional local effects; the more pronounced were a strong downregulation of leghaemoglobin, nodule cysteine-rich (NCR) peptides and nodule-enhanced nicotianamine synthase (neNAS). The neNAS has proven to be of importance for nodule functioning. Although other physiological impacts of nitrate on nodules were observed (e.g. nitrosylation of leghaemoglobin), the main effect was a rapid ion-specific and organ-specific change in gene expression levels. Contrastingly, during the first hours after ammonium applications, the transcriptome remained virtually unaffected. Therefore, nitrate-induced genes could be key for increasing the nitrate tolerance of SNF
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|a Journal Article
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|a Medicago truncatula
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|a NCR peptides
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|a Nitrate
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|a Nitrogen fixation
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|a Nodule activity
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|a RNA seq
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|a neNAS
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| 650 |
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|a Ammonium Compounds
|2 NLM
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| 650 |
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|a Nitrates
|2 NLM
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| 700 |
1 |
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|a Liese, Rebecca
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ballesteros, Gabriel
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Casieri, Leonardo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Salinas, Gabriela
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cabeza, Ricardo A
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant science : an international journal of experimental plant biology
|d 1985
|g 292(2020) vom: 01. März, Seite 110383
|w (DE-627)NLM098174193
|x 1873-2259
|7 nnns
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| 773 |
1 |
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|g volume:292
|g year:2020
|g day:01
|g month:03
|g pages:110383
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|u http://dx.doi.org/10.1016/j.plantsci.2019.110383
|3 Volltext
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