Differences in carrageenan in gametophytes and tetrasporophytes of red algae

The yield and type of carrageenan in the marine red algae Iridaea cordata , I. heterocarpa , I. lineare , Gigartina exasperata and G. papillata was examined. The yield from the species studied ranged from 52 to 66%. In gametophytes, the carrageenan was 93% κ-carrageenan; in tetrasporophytes, the carrageenan was 95% γ-carrageenan.