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231224s2014 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2014.07.017
|2 doi
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|a pubmed24n0804.xml
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|a (DE-627)NLM241286654
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|a (NLM)25155758
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|a (PII)S0176-1617(14)00206-5
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|a DE-627
|b ger
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|e rakwb
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|a eng
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1 |
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|a Kleinert, Aleysia
|e verfasserin
|4 aut
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|a The reallocation of carbon in P deficient lupins affects biological nitrogen fixation
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|c 2014
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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 18.05.2015
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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 © 2014 Elsevier GmbH. All rights reserved.
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|a It is not known how phosphate (P) deficiency affects the allocation of carbon (C) to biological nitrogen fixation (BNF) in legumes. The alteration of the respiratory and photosynthetic C costs of BNF was investigated under P deficiency. Although BNF can impose considerable sink stimulation on host respiratory and photosynthetic C, it is not known how the change in the C and energy allocation during P deficiency may affect BNF. Nodulated Lupinus luteus plants were grown in sand culture, using a modified Long Ashton nutrient solution containing no nitrogen (N) for ca. four weeks, after which one set was exposed to a P-deficient nutrient medium, while the other set continued growing on a P-sufficient nutrient medium. Phosphorus stress was measured at 20 days after onset of P-starvation. During P stress the decline in nodular P levels was associated with lower BNF and nodule growth. There was also a shift in the balance of photosynthetic and respiratory C toward a loss of C during P stress. Below-ground respiration declined under limiting P conditions. However, during this decline there was also a shift in the proportion of respiratory energy from maintenance toward growth respiration. Under P stress, there was an increased allocation of C toward root growth, thereby decreasing the amount of C available for maintenance respiration. It is therefore possible that the decline in BNF under P deficiency may be due to this change in resource allocation away from respiration associated with direct nutrient uptake, but rather toward a long term nutrient acquisition strategy of increased root growth
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|a Journal Article
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|a Carbon and nitrogen costs
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|a Nitrogen fixation
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|a P deficiency
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|a Photosynthesis
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|a Respiration
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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|a Phosphorus
|2 NLM
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|a 27YLU75U4W
|2 NLM
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|a Carbon
|2 NLM
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| 650 |
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|a 7440-44-0
|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 Venter, Mauritz
|e verfasserin
|4 aut
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|a Kossmann, Jens
|e verfasserin
|4 aut
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|a Valentine, Alexander
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 171(2014), 17 vom: 01. Nov., Seite 1619-24
|w (DE-627)NLM098174622
|x 1618-1328
|7 nnns
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| 773 |
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|g volume:171
|g year:2014
|g number:17
|g day:01
|g month:11
|g pages:1619-24
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|u http://dx.doi.org/10.1016/j.jplph.2014.07.017
|3 Volltext
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