13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies
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...
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fthighwire:oai:open-archive.highwire.org:jexbot:erp128v1 2023-05-15T18:40:27+02:00 13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies Baptist, Florence Tcherkez, Guillaume Aubert, Serge Pontailler, Jean-Yves Choler, Philippe Nogués, Salvador 2009-04-28 07:54:26.0 text/html http://jxb.oxfordjournals.org/cgi/content/short/erp128v1 https://doi.org/10.1093/jxb/erp128 en eng Oxford University Press http://jxb.oxfordjournals.org/cgi/content/short/erp128v1 http://dx.doi.org/10.1093/jxb/erp128 Copyright (C) 2009, Society for Experimental Biology Research Paper TEXT 2009 fthighwire https://doi.org/10.1093/jxb/erp128 2013-05-27T01:16:43Z 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. 12C/13C and 14N/15N 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 13C 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 15N uptake efficiency than KM and a higher translocation of reduced 15N 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. Text Tundra HighWire Press (Stanford University) Journal of Experimental Botany 60 9 2725 2735 |
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English |
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Research Paper |
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Research Paper Baptist, Florence Tcherkez, Guillaume Aubert, Serge Pontailler, Jean-Yves Choler, Philippe Nogués, Salvador 13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies |
topic_facet |
Research Paper |
description |
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. 12C/13C and 14N/15N 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 13C 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 15N uptake efficiency than KM and a higher translocation of reduced 15N 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. |
format |
Text |
author |
Baptist, Florence Tcherkez, Guillaume Aubert, Serge Pontailler, Jean-Yves Choler, Philippe Nogués, Salvador |
author_facet |
Baptist, Florence Tcherkez, Guillaume Aubert, Serge Pontailler, Jean-Yves Choler, Philippe Nogués, Salvador |
author_sort |
Baptist, Florence |
title |
13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies |
title_short |
13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies |
title_full |
13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies |
title_fullStr |
13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies |
title_full_unstemmed |
13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies |
title_sort |
13c and 15n allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://jxb.oxfordjournals.org/cgi/content/short/erp128v1 https://doi.org/10.1093/jxb/erp128 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
http://jxb.oxfordjournals.org/cgi/content/short/erp128v1 http://dx.doi.org/10.1093/jxb/erp128 |
op_rights |
Copyright (C) 2009, Society for Experimental Biology |
op_doi |
https://doi.org/10.1093/jxb/erp128 |
container_title |
Journal of Experimental Botany |
container_volume |
60 |
container_issue |
9 |
container_start_page |
2725 |
op_container_end_page |
2735 |
_version_ |
1766229807856615424 |