Purdue Climate Change Research Center

A Multiphase Study of the Nature, Sources, and Fate of Atmospheric Organic Nitrogen

Funded by the National Science Foundation

Results of this study, a collaborative effort between the Shepson, Filley and Rhodes groups, showed that plants can uptake (through stomata) and utilize atmospheric organic nitrogen. This was done by exposing aspen seedlings to a 15N labeled organic nitrate and detection of 15N in the plant amino acids. The work is important in addressing how trees can use atmospheric nitrogen when in nitrogen-limited conditions.

Lockwood, A.L., T.R. Filley, D. Rhodes, P.B. Shepson, Forest canopy uptake of atmospheric organic nitrogen (2008), Geophysical Research Letters 35, L15809, doi:10.1029/2008GL034714.


Paul Shepson, Chemistry

Contact Information

Purdue University
203 S. Martin Jischke Drive
MANN 105
West Lafayette, IN 47907