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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erp128
|2 doi
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|a DE-627
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|e rakwb
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|a eng
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|a Baptist, Florence
|e verfasserin
|4 aut
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|a 13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 13.08.2009
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|a Date Revised 22.03.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Intense efforts are currently devoted to disentangling the relationships between plant carbon (C) allocation patterns and soil nitrogen (N) availability because of their consequences for growth and more generally for C sequestration. In cold ecosystems, only a few studies have addressed whole-plant C and/or N allocation along natural elevational or topographical gradients. (12)C/(13)C and (14)N/(15)N isotope techniques have been used to elucidate C and N partitioning in two alpine graminoids characterized by contrasted nutrient economies: a slow-growing species, Kobresia myosuroides (KM), and a fast-growing species, Carex foetida (CF), located in early and late snowmelt habitats, respectively, within the alpine tundra (French Alps). CF allocated higher labelling-related (13)C content belowground and produced more root biomass. Furthermore, assimilates transferred to the roots were preferentially used for growth rather than respiration and tended to favour N reduction in this compartment. Accordingly, this species had higher (15)N uptake efficiency than KM and a higher translocation of reduced (15)N to aboveground organs. These results suggest that at the whole-plant level, there is a compromise between N acquisition/reduction and C allocation patterns for optimized growth
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|a Comparative Study
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carbon Isotopes
|2 NLM
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|a Nitrogen Isotopes
|2 NLM
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| 700 |
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|a Tcherkez, Guillaume
|e verfasserin
|4 aut
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|a Aubert, Serge
|e verfasserin
|4 aut
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|a Pontailler, Jean-Yves
|e verfasserin
|4 aut
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|a Choler, Philippe
|e verfasserin
|4 aut
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|a Nogués, Salvador
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 60(2009), 9 vom: 24., Seite 2725-35
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:60
|g year:2009
|g number:9
|g day:24
|g pages:2725-35
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|u http://dx.doi.org/10.1093/jxb/erp128
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