Time course of acetylene reduction in nodules of five actinorhizal genera.
The rate of acetylene reduction was measured as a function of time after addition of 10% acetylene in Alnus, Casuarina, Ceanothus, Datisca, and Myrica. The maximum rate occurred after 45 to 60 seconds and was maintained for an additional 0.5 to 4 minutes before a decline in rate to 30 to 90% of the maximum. The rate then recovered to a value of 63 to 98% of the maximum. Removal of the shoot and lower roots did not affect nodule activity.
Tjepkema
J D
JD
Department of Botany and Plant Pathology, University of Maine, Orono, Maine 04469.
Schwintzer
C R
CR
Monz
C A
CA