Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions

Dubbert M, Grieve Rascher K, Werner C (2012)
Photosynthesis Research 113(1-3): 297-309.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Stable carbon isotope signatures are often used as tracers for environmentally driven changes in photosynthetic delta C-13 discrimination. However, carbon isotope signatures downstream from carboxylation by Rubisco are altered within metabolic pathways, transport and respiratory processes, leading to differences in delta C-13 between carbon pools along the plant axis and in respired CO2. Little is known about the within-plant variation in delta C-13 under different environmental conditions or between species. We analyzed spatial, diurnal, and environmental variations in delta C-13 of water soluble organic matter (delta C-13(WSOM)) of leaves, phloem and roots, as well as dark-respired delta(CO2)-C-13 (delta C-13(res)) in leaves and roots. We selected distinct light environments (forest understory and an open area), seasons (Mediterranean spring and summer drought) and three functionally distinct understory species (two native shrubs-Halimium halimifolium and Rosmarinus officinalis-and a woody invader-Acacia longifolia). Spatial patterns in delta C-13(WSOM) along the plant vertical axis and between respired delta(CO2)-C-13 and its putative substrate were clearly species specific and the most delta C-13-enriched and depleted values were found in delta C-13 of leaf dark-respired CO2 and phloem sugars, similar to-15 and similar to-33 aEuro degrees, respectively. Comparisons between study sites and seasons revealed that spatial and diurnal patterns were influenced by environmental conditions. Within a species, phloem delta C-13(WSOM) and delta C-13(res) varied by up to 4 aEuro degrees between seasons and sites. Thus, careful characterization of the magnitude and environmental dependence of apparent post-carboxylation fractionation is needed when using delta C-13 signatures to trace changes in photosynthetic discrimination.
Stichworte
Carbon pools; fractionation; Carbon isotope; Post-carboxylation fractionation; Stable carbon isotopes; Environmental variability
Erscheinungsjahr
2012
Zeitschriftentitel
Photosynthesis Research
Band
113
Ausgabe
1-3
Seite(n)
297-309
ISSN
0166-8595
eISSN
1573-5079
Page URI
https://pub.uni-bielefeld.de/record/2530324

Zitieren

Dubbert M, Grieve Rascher K, Werner C. Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions. Photosynthesis Research. 2012;113(1-3):297-309.
Dubbert, M., Grieve Rascher, K., & Werner, C. (2012). Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions. Photosynthesis Research, 113(1-3), 297-309. doi:10.1007/s11120-012-9748-3
Dubbert, M., Grieve Rascher, K., and Werner, C. (2012). Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions. Photosynthesis Research 113, 297-309.
Dubbert, M., Grieve Rascher, K., & Werner, C., 2012. Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions. Photosynthesis Research, 113(1-3), p 297-309.
M. Dubbert, K. Grieve Rascher, and C. Werner, “Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions”, Photosynthesis Research, vol. 113, 2012, pp. 297-309.
Dubbert, M., Grieve Rascher, K., Werner, C.: Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions. Photosynthesis Research. 113, 297-309 (2012).
Dubbert, Maren, Grieve Rascher, Kathie, and Werner, Christiane. “Species-specific differences in temporal and spatial variation in delta C-13 of plant carbon pools and dark-respired CO2 under changing environmental conditions”. Photosynthesis Research 113.1-3 (2012): 297-309.

5 Zitationen in Europe PMC

Daten bereitgestellt von Europe PubMed Central.

Metabolic Fate of the Carboxyl Groups of Malate and Pyruvate and their Influence on δ(13)C of Leaf-Respired CO2 during Light Enhanced Dark Respiration.
Lehmann MM, Wegener F, Barthel M, Maurino VG, Siegwolf RT, Buchmann N, Werner C, Werner RA., Front Plant Sci 7(), 2016
PMID: 27375626
Malate as a key carbon source of leaf dark-respired CO2 across different environmental conditions in potato plants.
Lehmann MM, Rinne KT, Blessing C, Siegwolf RT, Buchmann N, Werner RA., J Exp Bot 66(19), 2015
PMID: 26139821

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