PRELIMINARY REPORT ON SUSPENSION CULTURE OF CLON OF PORPHYRA YEZOENSIS CONCHOSPORANGIAL FILAMENTS IN THE PRODUCTION OF CONCHOSPORES FOR PURPLE LAVER AQUACULTURE

InSpringof1990,carposporesofboyeamsiswerecollected,gendnatedandgrewuptothefree-livingConchocelis,whichproducedconchosporangialfilaments.Allexperimentswereconductedincultureboxeswithlightandtemperaturecontrol.Theresultsofanumberofexperimentsareasfollows:1.Afterthedevelopmentofconcho-sporangialfilamellts,theycanbecultivatedalone,andnormallydevelopanddischargealargenumberofconchospores.2.Thesuspensionconchosporangialfilamentusedinpresentworkhavebeenvegetativelypropapatedmanytimesinseveralyears.…

PRELIMINARY REPORT ON SUSPENSION CULTURE OF CLON OF PORPHYRA YEZOENSIS CONCHOSPORANGIAL FILAMENTS IN THE PRODUCTION OF CONCHOSPORES FOR PURPLE LAVER AQUACULTURE

For the aquaculture of Porphyra, seedling is a key link. At present,carpospores of the hara are sown on molluscan shells and the Conchocelis stage is produced. The latter gives rise to the concho sporangial filaments, finally produces conchospores. Production nets are provided on which the liberated conchospores attach and grow. The whole process takes 5 - 6 months, and a large area of ponds have to be devoted to culture of the Conchocelis in shells. Iwasaki et al. (1963) reported on cultivation of the free-living Conchocelis. But it still had to be sown on molluscan shells and cultivated in ponds. It seems that only the Conchocelis growing in shells are capable of producing conchospores. At present sithelar method is employed in China. Therefore it is of great importance whether suspension cultivation of concho-sprangial filaments without the shells are able to produce conchospores.