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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erx056
|2 doi
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|a pubmed24n1348.xml
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|a (DE-627)NLM270673202
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|a (NLM)28379423
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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 Guo, Qianqian
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Depletion of carbohydrate reserves limits nitrate uptake during early regrowth in Lolium perenne L
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|c 2017
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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
|b cr
|2 rdacarrier
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|a Date Completed 18.07.2018
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|a Date Revised 26.03.2024
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author 2017. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a The mechanisms linking C/N balance to N uptake and assimilation are central to plant responses to changing soil nutrient levels. Defoliation and subsequent regrowth of grasses both impact C partitioning, thereby creating a significant point of interaction with soil N availability. Using defoliation as an experimental treatment, we investigated the dynamic relationships between plant carbohydrate status and NO3--responsive uptake systems, transporter gene expression, and nitrate assimilation in Lolium perenne L. High- and low-affinity NO3- uptake was reduced in an N-dependent manner in response to a rapid and large shift in carbohydrate remobilization triggered by defoliation. This reduction in NO3- uptake was rescued by an exogenous glucose supplement, confirming the carbohydrate dependence of NO3- uptake. The regulation of NO3- uptake in response to the perturbation of the plant C/N ratio was associated with changes in expression of putative high- and low-affinity NO3- transporters. Furthermore, NO3- assimilation appears to be regulated by the C-N status of the plant, implying a mechanism that signals the availability of C metabolites for NO3- uptake and assimilation at the whole-plant level. We also show that cytokinins may be involved in the regulation of N acquisition and assimilation in response to the changing plant C/N ratio
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carbohydrate
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|a Lolium perenne
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|a carbon
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|a cytokinin
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|a fructan
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|a nitrate transporter (NRT)
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|a nitrate uptake
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|a nitrogen
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|a nitrogen use efficiency (NUE)
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|a perennial ryegrass.
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|a Nitrates
|2 NLM
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|a Plant Proteins
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Turnbull, Matthew Hamish
|e verfasserin
|4 aut
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| 700 |
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|a Song, Jiancheng
|e verfasserin
|4 aut
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| 700 |
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|a Roche, Jessica
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Novak, Ondrej
|e verfasserin
|4 aut
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| 700 |
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|a Späth, Jana
|e verfasserin
|4 aut
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| 700 |
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|a Jameson, Paula Elizabeth
|e verfasserin
|4 aut
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| 700 |
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|a Love, Jonathan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 68(2017), 7 vom: 01. März, Seite 1569-1583
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:68
|g year:2017
|g number:7
|g day:01
|g month:03
|g pages:1569-1583
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|u http://dx.doi.org/10.1093/jxb/erx056
|3 Volltext
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