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- Title
Instantaneous Q<sub>10</sub> of night‐time leaf respiratory CO<sub>2</sub> efflux – measurement and analytical protocol considerations.
- Authors
Bruhn, Dan; Povlsen, Peter; Gardner, Anna; Mercado, Lina M.
- Abstract
Summary: The temperature sensitivity (e.g. Q10) of night‐time leaf respiratory CO2 efflux (RCO2) is a fundamental aspect of leaf physiology. The Q10 typically exhibits a dependence on measurement temperature, and it is speculated that this is due to temperature‐dependent shifts in the relative control of leaf RCO2. Two decades ago, a review hypothesized that this mechanistically caused change in values of Q10 is predictable across plant taxa and biomes. Here, we discuss the most appropriate measuring protocol among existing data and for future data collection, to form the foundation of a future mechanistic understanding of Q10 of leaf RCO2 at different temperature ranges. We do this primarily via a review of existing literature on Q10 of night‐time RCO2 and only supplement this to a lesser degree with our own original data. Based on mechanistic considerations, we encourage that instantaneous Q10 of leaf RCO2 to represent night‐time should be measured: only at night‐time; only in response to short‐term narrow temperature variation (e.g. max. 10°C) to represent a given midpoint temperature at a time; in response to as many temperatures as possible within the chosen temperature range; and on still attached leaves.
- Subjects
LITERATURE reviews; TEMPERATURE measurements; ACQUISITION of data; LEAF physiology
- Publication
New Phytologist, 2024, Vol 243, Issue 1, p23
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/nph.19753