13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies.
13C and 15N allocations of two alpine species from early and late snowmelt locations reflect their different growth strategies.
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DOI：
10.1093/jxb/erp128
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发表时间：
2009
影响因子：
6.9
通讯作者：
Nogués S
中科院分区：
文献类型：
--
作者：
Baptist F;Tcherkez G;Aubert S;Pontailler JY;Choler P;Nogués S
由于植物碳（C）分配模式和土壤氮（N）有效性对植物生长和更普遍的C固存的影响，目前正致力于解开植物碳（C）分配模式和土壤氮（N）有效性之间的关系。在寒冷的生态系统中，只有少数研究已经解决了整个植物C和/或N分配沿着自然海拔或地形梯度。12 C/13 C和14 N/15 N同位素技术已被用来阐明C和N分配在两个高山禾本科植物的特点是对比营养经济：一个缓慢生长的物种，嵩草myosuroides（KM），和一个快速生长的物种，苔草foetida（CF），分别位于早期和晚期融雪栖息地，在高山冻原（法国阿尔卑斯山）。CF分配更高的标记相关的13 C含量地下，产生更多的根生物量。此外，同化物转移到根优先用于生长，而不是呼吸作用，并倾向于有利于在此室的氮还原。因此，该物种有较高的15 N吸收效率比KM和减少15 N到地上部器官的更高的易位。这些结果表明，在整个植物水平上，有一个妥协的N收购/减少和C分配模式优化增长。
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.
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影响因子：
4.2
作者：
Baptist, Florence;Choler, Philippe
通讯作者：
Choler, Philippe
DOI：
10.2307/1551014
发表时间：
1985-01-01
期刊：
ARCTIC AND ALPINE RESEARCH
影响因子：
--
作者：
GRULKE, NE;BLISS, LC
通讯作者：
BLISS, LC
影响因子：
9.4
作者：
Atkin, O. K.;Scheurwater, I.;Pons, T. L.
通讯作者：
Pons, T. L.
影响因子：
9.4
作者：
Atkinson, Lindsey J.;Hellicar, Martin A.;Atkin, Owen K.
通讯作者：
Atkin, Owen K.
影响因子：
1.3
作者：
Kudo, G
通讯作者：
Kudo, G