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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erv307
|2 doi
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|a pubmed24n1342.xml
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|a (NLM)26105997
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a in 't Zandt, Dina
|e verfasserin
|4 aut
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|a High-resolution quantification of root dynamics in split-nutrient rhizoslides reveals rapid and strong proliferation of maize roots in response to local high nitrogen
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|c 2015
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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 16.05.2016
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|a Date Revised 23.03.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a The plant's root system is highly plastic, and can respond to environmental stimuli such as high nitrogen (N) in patches. A root may respond to an N patch by selective placement of new lateral roots, and therewith increases root N uptake. This may be a desirable trait in breeding programmes, since it decreases NO3(-) leaching and N2O emission. Roots of maize (Zea mays L.) were grown without N in split-nutrient rhizoslides. One side of the slides was exposed to high N after 15 d of root development, and root elongation was measured for another 15 d, described in a time course model and parameterized. The elongation rates of crown axile roots on the N-treated side of the plant followed a logistic increase to a maximum of 5.3cm d(-1); 95% of the maximum were reached within 4 d. At the same time, on the untreated side, axile root elongation dropped linearly to 1.2cm d(-1) within 6.4 d and stayed constant thereafter. Twice as many lateral roots were formed on the crown axis on the N side compared to the untreated side. Most strikingly, the elongation rates of laterals of the N side increased linearly with most of the roots reaching an asymptote ~8 d after start of the N treatment. By contrast, laterals on the side without N did not show any detectable elongation beyond the first day after their emergence. We conclude that split-nutrient rhizoslides have great potential to improve our knowledge about nitrogen responsiveness and selection for contrasting genotypes
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Corn
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|a foraging
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|a nitrogen
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|a rhizotrons
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|a root growth
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|a split-root.
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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|a Le Marié, Chantal
|e verfasserin
|4 aut
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|a Kirchgessner, Norbert
|e verfasserin
|4 aut
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|a Visser, Eric J W
|e verfasserin
|4 aut
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|a Hund, Andreas
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 66(2015), 18 vom: 24. Sept., Seite 5507-17
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:66
|g year:2015
|g number:18
|g day:24
|g month:09
|g pages:5507-17
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|u http://dx.doi.org/10.1093/jxb/erv307
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