Free living conchocelis of Porphyra yezoensis Ueda (Bangiales, Rhodophyta) were treated with 6 0Co γ rays of different doses (ranging from 100 Gy to 1000 Gy) to induce mutation. Most of the conchocelis maintained the...Free living conchocelis of Porphyra yezoensis Ueda (Bangiales, Rhodophyta) were treated with 6 0Co γ rays of different doses (ranging from 100 Gy to 1000 Gy) to induce mutation. Most of the conchocelis maintained the capability of penetrating into shells, growing and forming colonies in shells, but their vitality was seriously impaired by the irradiation of γ rays. A few conchocelis pigments were mutagenized directly into different color pigment mutants whose progeny conchospores and foliose thalli had the same colors. However, some irradiated conchocelis did not show the change in color at the conchocelis stage. The pigment mutation could be observed only after the conchospores of these conchocelis had germinated into young foliose thalli. Irradiation of low dose (100 Gy) promoted the growth of thallus and many with altered morphology were observed. Conchospores of the irradiated conchocelis attached to the culture nets were cultured in the sea, and growth of these progenies was observed and measured.展开更多
IAA 3-Indolylaceic acid, NAA a-Naphthylacetic acid and Cytokinins in PESI culture mediumwere used in a study on the effects of plant hormones on the growth of free-living conchocelis ofPorphyra yezoensis which showed ...IAA 3-Indolylaceic acid, NAA a-Naphthylacetic acid and Cytokinins in PESI culture mediumwere used in a study on the effects of plant hormones on the growth of free-living conchocelis ofPorphyra yezoensis which showed that its growth in medium with cytokinins, IAA and NAA was morerapid than that in medium with non-phytohormones, that the optimal concentrations for promotinggrowth were 10μg/L for IAA and ZA (Zeatin), and 0.1 μg/L for BA 6-Benzyl amino purine and KIN6-Furfurylamino- purine. Mix use of NAA, IAA and cytokinins, NAA/ZA 1-1000/1μg/L, NAA/BA10/1-1000μg/L, NAA/KIN 1/1-1000μg/L promoted growth. IAA/ZA 0.1 - 1/0.1 - 1 μg/L, IAA/BA0.1 - 1/0.1 - 10 μg/L IAA/KIN 1/0.1 - 1000μg/L also promoted growth.展开更多
Ths Mar. 1993 to Aug. 1994 study on suspended conchocelis of Porphyra haitanensisshowed tha there were three pattems for developmnt of vegetative filaments: filaments to filaments by"budding"; filaments to s...Ths Mar. 1993 to Aug. 1994 study on suspended conchocelis of Porphyra haitanensisshowed tha there were three pattems for developmnt of vegetative filaments: filaments to filaments by"budding"; filaments to sporangial branchlets by "budding", or cell swelling. There were also three pat-terns for sporangial branchlet development: vegetatively propagting, changing into conbhospores, or dy-ing. Each developmntal stage had one or mere different developmntal directions between vegetative fila-ments and Sporangial branchlets. Developmnts from conchosporangial branchlets to conchospores were se-quential and irreversible. Although sporangial brachlets formed at 29℃ could give rise to filaments, theycould not propagae as healthily under the same condihons as those formed at 25℃ did. Probaby the cru-cial peried of plant cell differenhation is in the late stage of spompal branchlets. In line with the devel-opmental directions of different stages, the authors reghated the developmnt of conchocelis to get idealdifferent developmental smps materials to obtain very develoPmentally homogeneous stages, including fil-aments and sporanglal branchiets.展开更多
Results of the experiment of northward transplantation of Porphyra haitanensis showed thatintercrop of P. haitanensis with Bay Scallop is feasible because the growth duration of both of them is about the same in Augus...Results of the experiment of northward transplantation of Porphyra haitanensis showed thatintercrop of P. haitanensis with Bay Scallop is feasible because the growth duration of both of them is about the same in August - December.Full use of cultivating area, lowering its cost and increasing its product per unit area as well as improving the ecological envronment are realized during intercrop.展开更多
文摘Free living conchocelis of Porphyra yezoensis Ueda (Bangiales, Rhodophyta) were treated with 6 0Co γ rays of different doses (ranging from 100 Gy to 1000 Gy) to induce mutation. Most of the conchocelis maintained the capability of penetrating into shells, growing and forming colonies in shells, but their vitality was seriously impaired by the irradiation of γ rays. A few conchocelis pigments were mutagenized directly into different color pigment mutants whose progeny conchospores and foliose thalli had the same colors. However, some irradiated conchocelis did not show the change in color at the conchocelis stage. The pigment mutation could be observed only after the conchospores of these conchocelis had germinated into young foliose thalli. Irradiation of low dose (100 Gy) promoted the growth of thallus and many with altered morphology were observed. Conchospores of the irradiated conchocelis attached to the culture nets were cultured in the sea, and growth of these progenies was observed and measured.
基金The research was supported by a grant from the Chinese Aeademy of Scicnes
文摘IAA 3-Indolylaceic acid, NAA a-Naphthylacetic acid and Cytokinins in PESI culture mediumwere used in a study on the effects of plant hormones on the growth of free-living conchocelis ofPorphyra yezoensis which showed that its growth in medium with cytokinins, IAA and NAA was morerapid than that in medium with non-phytohormones, that the optimal concentrations for promotinggrowth were 10μg/L for IAA and ZA (Zeatin), and 0.1 μg/L for BA 6-Benzyl amino purine and KIN6-Furfurylamino- purine. Mix use of NAA, IAA and cytokinins, NAA/ZA 1-1000/1μg/L, NAA/BA10/1-1000μg/L, NAA/KIN 1/1-1000μg/L promoted growth. IAA/ZA 0.1 - 1/0.1 - 1 μg/L, IAA/BA0.1 - 1/0.1 - 10 μg/L IAA/KIN 1/0.1 - 1000μg/L also promoted growth.
文摘Ths Mar. 1993 to Aug. 1994 study on suspended conchocelis of Porphyra haitanensisshowed tha there were three pattems for developmnt of vegetative filaments: filaments to filaments by"budding"; filaments to sporangial branchlets by "budding", or cell swelling. There were also three pat-terns for sporangial branchlet development: vegetatively propagting, changing into conbhospores, or dy-ing. Each developmntal stage had one or mere different developmntal directions between vegetative fila-ments and Sporangial branchlets. Developmnts from conchosporangial branchlets to conchospores were se-quential and irreversible. Although sporangial brachlets formed at 29℃ could give rise to filaments, theycould not propagae as healthily under the same condihons as those formed at 25℃ did. Probaby the cru-cial peried of plant cell differenhation is in the late stage of spompal branchlets. In line with the devel-opmental directions of different stages, the authors reghated the developmnt of conchocelis to get idealdifferent developmental smps materials to obtain very develoPmentally homogeneous stages, including fil-aments and sporanglal branchiets.
文摘Results of the experiment of northward transplantation of Porphyra haitanensis showed thatintercrop of P. haitanensis with Bay Scallop is feasible because the growth duration of both of them is about the same in August - December.Full use of cultivating area, lowering its cost and increasing its product per unit area as well as improving the ecological envronment are realized during intercrop.
