Title Growth of excised pieces containing elongated denticles from the lower marginal parts of Porphyra tanegashimensis and P. haitanensis gametophytes
Authers Eiji FUJIYOSHI and Norio KIKUCHI
Keywords Porphyra, denticle, thallus, culture, gametophyte
Citation Bull. Fish. Res. Agen. No.16, 9-13, 2006
Porphyra tanegashimensis and Porphyra haitanensis gametophytes have elongated denticles that take the form of small lobes on their lower marginal parts. We investigated the ability of these elongated denticles to form gametophyte lobes, using excised pieces that were freed from the influence of other parts. Gametophytes of the two species were cultured from conchospores for a period of 2 months. Small pieces containing elongated denticles were excised from the lower marginal parts of the gametophytes and cultured at 20 ℃ and 40μmol photons m -2 s -1 under a photoperiod regime of 10L : 14D( light : dark). After about 1 month, some of the elongated denticles further developed, and the excised pieces came to resemble lacerated thalli. These results suggest that the elongated denticles possess the ability to grow into lobes under natural conditions.
URI http://www.fra.affrc.go.jp/bulletin/bull/bull16/fujiyosi.pdf