it is postulated that energy requirements for active na ( + ) exclusion were reduced by addition of ca ( 2+ ) allowing more energy to be used for cell growth resulting in increased growth rates.o ( 2 ) evolution and co ( 2 ) fixation studies indicated that increased photosynthetic energy , probably actuated by a high proton gradient accompanying cl ( - ) influx and uncoupled from co ( 2 ) fixation , was available for maintenance of cellular integrity and active control of intracellular ionic ratios .
C0007595
cell
C0007634
cellular