On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination

Grieve Rascher K, Maguas C, Werner C (2010)
Tree Physiology 30(12): 1499-1514.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
Abstract / Bemerkung
In this study we measured delta C-13 in various carbon pools along the basipetal transport pathway in co-occurring Pinus pinaster and Acacia longifolia trees under Mediterranean climate conditions in the field. Overall, species differences in photosynthetic discrimination resulted in more enriched delta C-13 values in the water-conserving overstory P. pinaster relative to the water-spending understory invasive A. longifolia. Post-photosynthetic fractionation effects resulted in differences in delta C-13 of water-soluble organic matter pools along the plant axis with progressive depletion in delta C-13 from the canopy to the trunk (similar to 6.5% depletion in A. longifolia and similar to 0.8% depletion in P. pinaster). Regardless of these fractionation effects, phloem sap delta C-13 in both terminal branches and the main stem correlated well with environmental parameters driving photosynthesis for both species, indicating that phloem sap delta C-13 has potential as an integrative tracer of changes in canopy carbon discrimination (Delta C-13). Furthermore, we illustrate that a simple model based on sap flow estimated canopy stomatal conductance (G(S)) and phloem sap delta C-13 measurements has significant potential as a tool for estimating canopy-level carbon assimilation rates.
Erscheinungsjahr
Zeitschriftentitel
Tree Physiology
Band
30
Ausgabe
12
Seite(n)
1499-1514
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Grieve Rascher K, Maguas C, Werner C. On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination. Tree Physiology. 2010;30(12):1499-1514.
Grieve Rascher, K., Maguas, C., & Werner, C. (2010). On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination. Tree Physiology, 30(12), 1499-1514. doi:10.1093/treephys/tpq092
Grieve Rascher, K., Maguas, C., and Werner, C. (2010). On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination. Tree Physiology 30, 1499-1514.
Grieve Rascher, K., Maguas, C., & Werner, C., 2010. On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination. Tree Physiology, 30(12), p 1499-1514.
K. Grieve Rascher, C. Maguas, and C. Werner, “On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination”, Tree Physiology, vol. 30, 2010, pp. 1499-1514.
Grieve Rascher, K., Maguas, C., Werner, C.: On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination. Tree Physiology. 30, 1499-1514 (2010).
Grieve Rascher, Kathie, Maguas, Cristina, and Werner, Christiane. “On the use of phloem sap delta C-13 as an indicator of canopy carbon discrimination”. Tree Physiology 30.12 (2010): 1499-1514.

13 Zitationen in Europe PMC

Daten bereitgestellt von Europe PubMed Central.

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Rascher KG, Große-Stoltenberg A, Máguas C, Werner C., Ecosystems. 14(6), 2011
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