Algal photosynthesis at increased hydrostatic pressure and constant pO2

Summary Rates of oxygen evolution, ¹⁴CO₂ uptake, and growth were measured in several species of algae and diatoms exposed to hydrostatic pressures up to 600 atm. All of the parameters measured decreased approximately linearly with increased pressure over the range tested. Oxygen evolution appears to be less sensitive to increased pressure than CO₂ fixation or growth.This paper was supported by Office of Naval Research Contract No. 00014-67-A-0387-0008 and intramural research grants from the University of Hawaii.This work is taken in part from a thesis to be submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Microbiology, University of Hawaii.