作者
Jianbei Huang, Almuth Hammerbacher, Alexander Weinhold, Michael Reichelt, Gerd Gleixner, Thomas Behrendt, Nicole M Van Dam, Anna Sala, Jonathan Gershenzon, Susan Trumbore, Henrik Hartmann
发表日期
2019/4
期刊
New Phytologist
卷号
222
期号
1
页码范围
144-158
简介
- Carbon (C) allocation plays a central role in tree responses to environmental changes. Yet, fundamental questions remain about how trees allocate C to different sinks, for example, growth vs storage and defense.
- In order to elucidate allocation priorities, we manipulated the whole‐tree C balance by modifying atmospheric CO2 concentrations [CO2] to create two distinct gradients of declining C availability, and compared how C was allocated among fluxes (respiration and volatile monoterpenes) and biomass C pools (total biomass, nonstructural carbohydrates (NSC) and secondary metabolites (SM)) in well‐watered Norway spruce (Picea abies) saplings. Continuous isotope labelling was used to trace the fate of newly‐assimilated C.
- Reducing [CO2] to 120 ppm caused an aboveground C compensation point (i.e. net C balance was zero) and resulted in decreases in growth and respiration. By contrast, soluble …
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J Huang, A Hammerbacher, A Weinhold, M Reichelt… - New Phytologist, 2019