U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights


The Energetic and Carbon Economic Origins of Leaf Thermoregulation
Published: August 22, 2016
Posted: June 15, 2017

The Science 
The research described in this paper uses a variety of global datasets to support theory suggesting that plants maximize carbon gain, in part, via myriad traits that regulate temperature near the optimum for photosynthesis. 

The Impact
This paper provides the first large advance in our understanding of leaf thermoregulation, and is thus likely to be tested widely.

Summary
Leaf thermoregulation has been rarely documented, and its control is unknown. However, leaf temperature is one of the most critical parameters regulating photosynthesis in Earth System Models. Improving its understanding has widespread fundamental and applied (e.g., modeling) value. We tested a novel carbon and energy-based theory using multiple global datasets of leaf temperature and photosynthesis, along with myriad leaf traits. The theory was supported by the data, and demonstrated that leaf thermoregulation does act to maximize photosynthesis. This paper has broad implications for fundamental biology and for applied modeling of ecosystems.

Contacts (BER PM)
Daniel Stover
SC-23.1
Daniel.Stover@science.doe.gov (301-903-0289)

(PI Contact)
Nate McDowell
Pacific Northwest National Lab
nate.mcdowell@pnnl.gov

Funding
Funding was provided by DOE, Office of Science, NGEE-Tropics, via LANL LDRD, via NSF, and via the Aspen Center for Environmental Studies. 

Publications
Michaletz, S.T., Weiser, M.D., McDowell, N.G., Zhou, J., Kaspari, M., Helliker, B.R. and Enquist, B.J., 2016. The energetic and carbon economic origins of leaf thermoregulation. Nature Plants, 2, p.16129. DOI:10.1038/nplants.2016.129.

Topic Areas:

  • Research Area: Terrestrial Ecosystem Science

Division: SC-23.1 Climate and Environmental Sciences Division, BER

 

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