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231224s2013 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/ert234
|2 doi
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|a pubmed24n1342.xml
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|a (DE-627)NLM230201008
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|a (NLM)23963674
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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 Luo, Jie
|e verfasserin
|4 aut
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| 245 |
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|a Nitrogen metabolism of two contrasting poplar species during acclimation to limiting nitrogen availability
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|c 2013
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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 27.05.2014
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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 To investigate N metabolism of two contrasting Populus species in acclimation to low N availability, saplings of slow-growing species (Populus popularis, Pp) and a fast-growing species (Populus alba × Populus glandulosa, Pg) were exposed to 10, 100, or 1000 μM NH4NO3. Despite greater root biomass and fine root surface area in Pp, lower net influxes of NH4(+) and NO3(-) at the root surface were detected in Pp compared to those in Pg, corresponding well to lower NH4(+) and NO3(-) content and total N concentration in Pp roots. Meanwhile, higher stable N isotope composition (δ(15)N) in roots and stronger responsiveness of transcriptional regulation of 18 genes involved in N metabolism were found in roots and leaves of Pp compared to those of Pg. These results indicate that the N metabolism of Pp is more sensitive to decreasing N availability than that of Pg. In both species, low N treatments decreased net influxes of NH4(+) and NO3(-), root NH4(+) and foliar NO3(-) content, root NR activities, total N concentration in roots and leaves, and transcript levels of most ammonium (AMTs) and nitrate (NRTs) transporter genes in leaves and genes involved in N assimilation in roots and leaves. Low N availability increased fine root surface area, foliar starch concentration, δ(15)N in roots and leaves, and transcript abundance of several AMTs (e.g. AMT1;2) and NRTs (e.g. NRT1;2 and NRT2;4B) in roots of both species. These data indicate that poplar species slow down processes of N acquisition and assimilation in acclimation to limiting N supply
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Gene expression
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|a glutamate synthase
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|a glutamine synthetase
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|a net flux
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|a nitrate reductase
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|a nitrite reductase
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|a plasma membrane H#x002B;-ATPase
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|a poplar
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|a stable carbon isotope.
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|a Ammonium Compounds
|2 NLM
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|a Minerals
|2 NLM
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|a Nitrates
|2 NLM
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|a Nitrites
|2 NLM
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|a Nitrogen Isotopes
|2 NLM
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|a Proton-Translocating ATPases
|2 NLM
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|a EC 3.6.3.14
|2 NLM
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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|a Li, Hong
|e verfasserin
|4 aut
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|a Liu, Tongxian
|e verfasserin
|4 aut
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|a Polle, Andrea
|e verfasserin
|4 aut
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| 700 |
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|a Peng, Changhui
|e verfasserin
|4 aut
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| 700 |
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|a Luo, Zhi-Bin
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 64(2013), 14 vom: 21. Nov., Seite 4207-24
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:64
|g year:2013
|g number:14
|g day:21
|g month:11
|g pages:4207-24
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|u http://dx.doi.org/10.1093/jxb/ert234
|3 Volltext
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