No abstract

Effect of photon fluence rate, nitrogen limitation and nitrogen recovery on the !ei'el of phyeoerythrin in the unicellular alga. Rhoilo.uniu mariiuis fRhodophyeeael. -Physiol. Plant. 92: 521-527.Studies vvere canied out on the etfects of itTadiance and nitrogen sources on phycoerythrin accumulation in the unicellular Rhodophvcea. RhudoMtrus mayinus. The ability of this microalgal species for natural cell aggregation was used to separate easily the biomass from the culture medium, Afler the temsnal oi nitrogen from the growth mediutn. phycoerythrin content decreased with time, faster the higher the fluence rate. The results suggest that, in A", niarlnus, a large pan of the phycoerythrin content of N-sufficicn! cells is used for nitrogen storage. Restoration of nitrogen in the growth medium induced an increase of phycoerythrin contem. even when cells were maintained in darkness. Dilfeient inorganic and organic nitrogen sourees were shown to protnote also phycoerythrin recoverv in the dark.