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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal DOI :
The Korean Society of Phycology
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Volume & Issues
Volume 13, Issue 3 - Sep 1998
Volume 13, Issue 2 - Jun 1998
Volume 13, Issue 1 - Mar 1998
Volume 13, Issue 4 - 00 1998
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Notes on Little-known Algae in Korea (I)
Lee, Hae-Bok ; Kim, Jong-In ; Lee, Jae-Wan ; Oh, Byoung-Geon ;
ALGAE, volume 13, issue 2, 1998, Pages 165~165
Three species of marine benthic algae new to Korea are reported. Among them Entocladia viridis (Chlorphyta) is tiny and epiphytic on other macroalgae, and Pikea californica and Ahnfeltiopsis catenata (Rhodophyta) are saxicolous on intertidal to substrata. The morphotaxonomic characteristics of them are described.
Floristic and Taxonomic Accounts of the Genus Euglena (Euglenophyceae) from Korean Fresh Waters
Kim, Jun-Tae ; Boo, Sung-Min ; Zakrys, Bozena ;
ALGAE, volume 13, issue 2, 1998, Pages 173~173
This paper contains descriptions, illustrations and key to identify 22 taxa of the genus Euglena collected from 58 sites of Korean fresh waters. Of these, 12 taxa are recorded for the first time in the euglenoid flora of Korea: E. archaeoplastidiata, E. caudata, E. granulata, E. oblonga, E. obtusa, E. deses var deses, E. deses var. intermedia, E. ehrenbergii var. baculifera, E. limnophila, E. texta, E. truncata, and E. variabilis. Most of the members are cosmopolitan, whereas E. archaeoplastidiata, E, ehrenbergii var. baculifera, E. truncata, and E. variabilis are the rare taxa in the world flora of euglenoids.
Life History and Taxonomy of Aglaothamnion oosumiense Itono (Ceramiaceae, Rhodophyta)
Chah, Ok-Kyong ; Kim, Gwang-Hoon ;
ALGAE, volume 13, issue 2, 1998, Pages 199~199
Life history and post-fertilization process of Aglaothamnion oosumiense from Korea were studied in culture. This species showed a Polysiphonia-type life history with dioecious gametophyte as well as asexual reproduction via parasporangium on male plants. The occurrence of parasporangiate plants was not affected by environmental factors nor inherited strictly to the next generation. Most (>95%) of the paraspores developed into male plants while less than 5% of paraspores became parasporangiate male plants again. Bisexual plants were also observed. Each carpogonial branch had two auxiliary cells, which divided distally to produce the primary gonimoblast initials, respectively, before the foot cells were cut off proximately from it by intercalary divisions, Two carposporophytes resulted from a successful fertilization. Morphologically, Aglaothamnion oosumiense resembled Aglaothamnion callophyllidicola (Yamada) Boo, Lee, Rueness et Yoshida, and the taxonomic characters separating them were found to be unstable. The taxonomic relationship between the two species, therefore, should be critically reassessed with a thorough reexamination including their type specimens.
Life History and Growth of the Epiphytic Thallus of Porphyra lacerata (Bangiales, Rhodophyta) in Culture
Notoya, Masahiro ; Nagaura, Kazuhiro ;
ALGAE, volume 13, issue 2, 1998, Pages 207~207
This is the first report on small epiphytic foliose thalli of Porphyra lacerata from Banda, Chiba Prefecture, Japan. Matured foliose thalli from the field were
in maximum length and width, and occurred as epiphytes on Myeluphycus simplex or Ishige okamurae. They were clearly smaller than those of epilithic thalli from Enoshima, Kanagawa Prefecture. Zygotospores and conchospores were cultured to observe their life history at various temperatures (5, 10, 15, 20, 25 and
) and two photoperiods (14L:10D and 10L:14D) under a photon flux density of
. Typical biphasic cycle of the P. lacerata-type was observed. The foliose thalli produced archeospores at
under both photoperiods, and produced zygotospores at
under short photoperiod and at
under long photoperiod. The foliose thalli and the conchocelis filaments could not survive at
. The maximum size of foliose thallus,
) was observed at
under a 10L:14D after 15 weeks in culture. The size and shape of thalli in culture were similar to the field materials, epiphytic on Myeolphycus simplex. Hus' formula in cultured thalli, was 64 (a/4, b/4, c/4) or 32 (a/4, b/2, c/4) in spermatangium and 8 (a/2, b/2, c/2) or 4 (a/2, b/1, c/2) in zygotosporangium, respectively. Zygotospore germlings grew to conchocelis filaments. It grew quickly at
under long photoperiod. Conchosporangial branches were produced at
under both photoperiods. Conchocelis produced neither monospores nor protothalli.
Qualitative and Quantitative Analysis of Warm Tolerant Benthic Marine Algae in Korea I. Kori Nuclear Power Plant
Kim, Young-Hwan ; Eum, Hee-Moon ; Kang, Yeon-Shik ;
ALGAE, volume 13, issue 2, 1998, Pages 213~213
Heated effluents from nuclear power plants, with the temperature rises of
under normal operating and design conditions, are discharged through the discharge canal and into natural water bodies. Thus, the benthic marine algae grown at the discharge canal can be regarded as warm tolerant species. This study is intended to clarify the structure and seasonal dynamics of warm tolerant benthic marine algal community in Korea. The species composition and biomass of marine algae at the discharge canal of Kori nuclear power plant unit 1 were investigated seasonally from February 1992 to October 1997. As a result, a total of 98 species of marine algae was found during the past 6 years. In general, the number of species observed was abundant in spring or summer and less in autumn or winter.23 species (1 blue-green, 7 green, 5 brown and 10 red algae) of marine algae occurred more than 20% frequency and thus can be categorized as warm tolerant species. Among these, 14 species are recorded as warm tolerant marine algae for the first time in Korea during this study. Seasonal fluctuations of mean biomass were 10-488 g dry wt
, but biomass per unit area normally exhibited less than 180 g dry wt
. Seasonal trends of marine alga1 biomass are similar to those of the algal flora. Dominant species in biomass were Enteromorpha compressa (cumulative sum of seasonal biomass proportion 517%), Sargassum horneri (297%), Prionitis cornea (252%), Padina arborescens (232%), Amphiroa zonata (225%) and Ulva pertusa (213%). Results showed that, as a whole, the red algae appeared as predominant algal group at the discharge canal, and the green algae such as Entermorpha spp. were also the tolerant algal group particularly in the quantitative aspect. The biomass proportion of green algae decreased annually during the past six years; in contrast, that of red algae exhibited rather annual increase especially during 1996-1997. It is therefore assumed that, even in the regions influenced by thermal effluents such as the discharge canal of nuclear power plants, the process of ecological succession has been proceeded.
Advanced Treatment of Swine Wastewater by a Green Alga, Scenedesmus quadricauda
Park, Mi-Kyung ; Lee, Seog-June ; Suh, Hyun-Hyo ; Kim, Hee-Sik ; Kim, Young-Ho ; Yoon, Byung-Dae ; Oh, Hee-Mock ;
ALGAE, volume 13, issue 2, 1998, Pages 227~227
A green alga Scenedesmus quadricauda (Turpen) Brebisson was selected for the advanced treatment of swine wastewater for its hish efficiency of nitrogen and phosphorus removal and possibility of algal biomass use as feed. S. quadricauda grew well at
and optimum initial pH for growth was 8.0. Algal growth rate and the removal rate of nitrogen and phosphorus increased with light intensity in the range of
. Algal growth increased with phosphorus concentration under N-fixed (
) conditions and also increased with nitrogen concentration under P-fixed (
) cultures. As a whole, algal growth increased in a big scale along with nitrogen increase in the case of P-fixed condition. Therefore, it seems that the growth of S. quadricauda was affected not only by N:P ratios but also by the absolute concentration of N and P in the medium. The secondary-treated swine wastewater containing 58.65 mg/l of total nitrogen and 14.71 mg/l of total phosphorus was diluted to 25%, 50%, 75% and 100% with tap water. Nitrogen and phosphorus were concomitantly removed by the cultivation of S, quadricauda in all diluted swine wastewaters among which the most effective removal was in 50% swine wastewater (swine wastewater:tap water = 1:1). Under the optimized culture conditions, total nitrogen and phosphorus were effectively removed to 99.8% and 94.1%, respectively, after cultivation of 8 days at
under an irradiance of
in 50% swine wastewater.
Growth and Nutrient Kinetics of Some Algal Species Isolated from the Naktong River
Cho, Kyung-Je ; Shin, Jae-Ki ;
ALGAE, volume 13, issue 2, 1998, Pages 235~235
Some freshwater algae were isolated from the Naktong River in which they ate dominant and their growth kinetics were determined in the batch culture. Maximum growth rate (
) and half-saturation constant (
) varied with algal species. Microcystis aeruginosa had the high
for nitrogen. Stephanodiscus hantzschii f. tenuis had lower
for P and Si nutrient, and the higher values for
than any other algal species. S. hantzschii f. tenuis was assumed to be the best competitor in the low concentration of silica and M. aeruginosa in the high concentration of nitrogen. The growth kinetics of two predominant algae - S. hantzschii f. tenuis and M. aeruginosa - were coincided with the nutrient status or dynamics of the Naktong River. It was observed that other competitive diatoms succeeded to the Stephanodiscus and the phytoplankton composition changed temporarily after the nutrient gap or disturbance of silica during the droughty season in the Naktong River.
Light-dependent Changes in Chlorophyll Fluorescence from Thalli of Porphyra tenera under Osmotic Dehydration and Subsequent Rehydration are not Related with Water Flux
Kim, Tae-Hoon ; Hong, Dang-Diem ; Hwang, Mi-Sook ; Chung, Ik-Kyo ; Lee, Choon-Hwan ;
ALGAE, volume 13, issue 2, 1998, Pages 241~241
In red alga, Porphyra tenera, photochemical efficiency or Fv/Fm decreased in a biphasic manner in thalli treated with 9% or 12% NaCl, with a rapid phase observed with a rapid a phase observed within 10 min and followed by a slow phase. During rehydration, the increasing pattern of Fv/Fm was also biphasic. The changes in Fv/Fm was mainly due to the changes in a background fluorescence, Fo, and more pronounced changes in these parameters were observed in the light than in darkness. The increase of Fo during osmotic dehydration was not due to the hindrance of excitation energy transfer from phycobilisome to photosyatem (PS) II. Instead, the fluorescence emission from PSII decreased without significant changes in PSI fluorescence. Water fluxes in and out of Porphyra thalli were monitored by the changes in cell volume using a light microscope or indirectly by the changes in absorbance at 750 nm. The rapid water efflux was completed within 4 min, and the rapid influx within 1-2 min. The kinetics of the water flux was different from that of the Fo change, and the water flux was independent of the presence of light. These results suggest that the light dependent changes in Fo are not directly related with the rapid changes in the water flux. The possible candidates for the adaptation mechanisms are discussed.
Biotechnology and Molecular Characterization of Useful Seaweeds
Hong, Yong-Ki ;
ALGAE, volume 13, issue 2, 1998, Pages 251~251
Seaweed biotechnology is the field dealing with economical production of useful seaweeds and their chemicals. In this paper I will mainly discuss technical studies for seaweed biotechnology and seaweed molecular characterization. At first, a seaweed viability assay was developed to evaluate tissue intactness the using the enzymatic reduction of 2,3,5-triphenyltetrazolium chloride. Callus and blade formation, under axenic culture conditions of Hizikia fusiformis, depended on the gelling agents used as a substrate. The most calli and blades were produced on solid media composed of 2 % and 0.5 % high gel strength agars, respectively. For biologically active substances from seaweed extracts, we have found a Taq DNA polymerase inhibitor from Symphyocladia latiuscula. Antiviral activity against Herpes simplex was detected from Analipus japonicus extract. Growth of feed phytoplanktons, Isochrysis galbana and Tetraselmis suecica, was enhanced by the addition of some seaweed extracts. Growth of the red tide phytoplanktons, Alexandrium tamarense and Cochlodinium polykrikoides, was inhibited by Corallina pilulifera extract. Growth of the green alga Enteromorpha prolifera was enhanced by Porphyra yezoensis and inhibited by Ishige foliacea extracts. Extract of Monostroma nitidum reduced cholesterol level in Triton WR-1339 induced hypercholesterolemia. For the molecular characterization of seaweeds, RNA and DNA were extracted with the use of lithium chloride. The RNA was of sufficient quality to be used as a cDNA template for differential display in morphologically distinct regions of the thallus, and also in acid stressed tissue, of Porphya. The DNA was used as a template for PCR amplification to discriminate algae and for RAPD analysis. Finally we have tried gene transfer into young P. yezoensis thalli by particle bombardment. Thalli, bombarded with tungsten particles coated with a beta-glucuronidase gene, showed a transient expression of the gene at 18.6 unit/mg/h.
Developmental Morphology on the Regeneration of Pelvetia siliquosa Tseng et Chang (Phaeophyta) in Korea
Yoon, Jang-Taek ; Soh, Woong-Young ;
ALGAE, volume 13, issue 2, 1998, Pages 261~261
The morphogenesis of Pelvetia siliquosa was observed from the regeneration of fond segments in PESI media containing different IAA concentration. The heating process of the wounded segments followed the differentiation of the epidermal cells and filamentous cells. The adventitious branches were differentiated from the medullary cells. The regeneration of the frond showed higher activity with 90% at the receptacular fronds, which seemed to be most suitable for regeneration. In apical segments, the adventitious branches developed on the surface of upper fronds after forming conceptacles and releasing eggs and sperms. The development of adventitious branches of the two-year old frond required longer period than those of the one-year old one. The adventitious branches were well developed in lower concentration with 3 mg/l of IAA and were inhibited in higher concentration. The callus were well developed on the surface of upper segments cultured in agar media containing IAA. The process of wound healing, regeneration development of adventitious branches, and callus formation of P. siliquosa contributed to secure the elementary data for tissue culture of the fucoid algae.
Antifouling Action of Zosteric Acid and Copper on Spores of Ulva fasciata Delile
Shin, Hyun-Woung ;
ALGAE, volume 13, issue 2, 1998, Pages 271~271
The natural antifouling compound zosteric acid (ZA), from Zostera marina, and the well-known toxic antifouling agent the copper inhibited settlement of spores of the cosmopolitan fouling green alga Ulva fasciata at the early fouling stage. Antifouling dose-effectiveness of ZA revealed less effectiveness than a copper of antifouling action in spores of U. fasciata. Copper revealed
dose (50% of maximal aggregate spores) effectiveness at
while the ZA dose effectiveness revealed at
. Comparison of toxic and non-toxic AFs dose effectiveness will be base line for further fouling study.