Dynamics of initial carbon allocation after drought release in mature Norway spruce-Increased belowground allocation of current photoassimilates covers only half of the carbon used for fine-root growth
Standard
Dynamics of initial carbon allocation after drought release in mature Norway spruce-Increased belowground allocation of current photoassimilates covers only half of the carbon used for fine-root growth. / Hikino, Kyohsuke; Danzberger, Jasmin; Riedel, Vincent P; Hesse, Benjamin D; Hafner, Benjamin D; Gebhardt, Timo; Rehschuh, Romy; Ruehr, Nadine K; Brunn, Melanie; Bauerle, Taryn L; Landhäusser, Simon M; Lehmann, Marco M; Rötzer, Thomas; Pretzsch, Hans; Buegger, Franz; Weikl, Fabian; Pritsch, Karin; Grams, Thorsten E E.
In: GLOBAL CHANGE BIOL, Vol. 28, No. 23, 12.2022, p. 6889-6905.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Dynamics of initial carbon allocation after drought release in mature Norway spruce-Increased belowground allocation of current photoassimilates covers only half of the carbon used for fine-root growth
AU - Hikino, Kyohsuke
AU - Danzberger, Jasmin
AU - Riedel, Vincent P
AU - Hesse, Benjamin D
AU - Hafner, Benjamin D
AU - Gebhardt, Timo
AU - Rehschuh, Romy
AU - Ruehr, Nadine K
AU - Brunn, Melanie
AU - Bauerle, Taryn L
AU - Landhäusser, Simon M
AU - Lehmann, Marco M
AU - Rötzer, Thomas
AU - Pretzsch, Hans
AU - Buegger, Franz
AU - Weikl, Fabian
AU - Pritsch, Karin
AU - Grams, Thorsten E E
N1 - © 2022 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
PY - 2022/12
Y1 - 2022/12
N2 - After drought events, tree recovery depends on sufficient carbon (C) allocation to the sink organs. The present study aimed to elucidate dynamics of tree-level C sink activity and allocation of recent photoassimilates (Cnew ) and stored C in c. 70-year-old Norway spruce (Picea abies) trees during a 4-week period after drought release. We conducted a continuous, whole-tree 13 C labeling in parallel with controlled watering after 5 years of experimental summer drought. The fate of Cnew to growth and CO2 efflux was tracked along branches, stems, coarse- and fine roots, ectomycorrhizae and root exudates to soil CO2 efflux after drought release. Compared with control trees, drought recovering trees showed an overall 6% lower C sink activity and 19% less allocation of Cnew to aboveground sinks, indicating a low priority for aboveground sinks during recovery. In contrast, fine-root growth in recovering trees was seven times greater than that of controls. However, only half of the C used for new fine-root growth was comprised of Cnew while the other half was supplied by stored C. For drought recovery of mature spruce trees, in addition to Cnew , stored C appears to be critical for the regeneration of the fine-root system and the associated water uptake capacity.
AB - After drought events, tree recovery depends on sufficient carbon (C) allocation to the sink organs. The present study aimed to elucidate dynamics of tree-level C sink activity and allocation of recent photoassimilates (Cnew ) and stored C in c. 70-year-old Norway spruce (Picea abies) trees during a 4-week period after drought release. We conducted a continuous, whole-tree 13 C labeling in parallel with controlled watering after 5 years of experimental summer drought. The fate of Cnew to growth and CO2 efflux was tracked along branches, stems, coarse- and fine roots, ectomycorrhizae and root exudates to soil CO2 efflux after drought release. Compared with control trees, drought recovering trees showed an overall 6% lower C sink activity and 19% less allocation of Cnew to aboveground sinks, indicating a low priority for aboveground sinks during recovery. In contrast, fine-root growth in recovering trees was seven times greater than that of controls. However, only half of the C used for new fine-root growth was comprised of Cnew while the other half was supplied by stored C. For drought recovery of mature spruce trees, in addition to Cnew , stored C appears to be critical for the regeneration of the fine-root system and the associated water uptake capacity.
KW - Picea
KW - Droughts
KW - Carbon
KW - Carbon Dioxide
KW - Trees
KW - Water
U2 - 10.1111/gcb.16388
DO - 10.1111/gcb.16388
M3 - SCORING: Journal article
C2 - 36039835
VL - 28
SP - 6889
EP - 6905
JO - GLOBAL CHANGE BIOL
JF - GLOBAL CHANGE BIOL
SN - 1354-1013
IS - 23
ER -