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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 11, Issue 4 - Dec 1996
Volume 11, Issue 3 - Sep 1996
Volume 11, Issue 2 - Jun 1996
Volume 11, Issue 1 - Mar 1996
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Morphological Study of Centric Diatom Coscinodiscus oculus-iridis Ehrenberg
Yang, Eun-Jin ; Choi, Joong-Ki ;
ALGAE, volume 11, issue 1, 1996, Pages 1~1
The morphological study of C. oculus-iridis was performed based on cultured and net samples with light microscope and scanning electron microscope. The samples were collected in Inchon coastal waters and cultured with F/2 media. Cell shape is coin or disk shape, valve face flat and slightly depressed in central area. Cingulum has 2-3 copulae and ligula band. Heterovalve structure which has hyaline area and central rosette in the central area of two valve was sometimes observed. Areolae size are equal or variable with the size of valve. Eye spot was observed on the areolae. Cribra morphology is variable during the valve formation. The foramina is circular with developed rim. The micro-labiate process and macro-labiate process of fan-shape were observed in marginal ring.
Fine Morphology of Some Cyclotella Species from the Freshwater Zone of the Naktong River
Cho, Kyung-Je ;
ALGAE, volume 11, issue 1, 1996, Pages 9~9
Cyclotella species are the most common and important in the freshwater zone of the Naktong River. Cyclotella specimens are examined under the light and electron microscope to clarify the taxonomic identity in describing the local species. The following 9 species are included : C. meneghiniana, C. atomus, C. stelligera, C. pseudestelligera, C. woltereckii, C. orientalis, C. glomerata, C. radiosa and one unidentified species. It is necessary to clearly differentiate the small Cyclotella species in the mixed algae assemblages. C. stelligera-group species have a wide range of morphological variations and continuum. Especially, C. stelligera, C. psudostelligera and C. woltereckii are obscure in their boundary for differentiating the specific identity. Many variations are observed in the morphology such as central zone with stellate areolar fascicles, fultoportular tubular protrusion in the valve margin and the branch pattern of inter-fascicular costal rib. C. meneghiniana, C. atomus and C. pseudostelligera are abundant as sub-dominant population in the Naktong River. Spatial and seasonal abundance of important Cyclotella taxa are monitored from June 1992 to October 1995 throughout the Naktong River.
Morphological Variations of the Marine Diatom Thalassiosira weissflogii under Culture Conditions
Kang, Jae-Shin ; Kim, Hyung-Sun ; Lee, Jin-Hwan ;
ALGAE, volume 11, issue 1, 1996, Pages 23~23
The diatom Thalassiosira weissflogii was cultured under different nitrate-nitrogen, phosphate-phosphorus and silicate-silica concentrations, salinity and water temperature. Specific growth rate was obtained for each group, and specimens were taken from each group while in the stationary phase and were observed with a scanning electron microscope to detect morphological variations. The result showed that the tendency for the average diameter to decrease with a higher specific growth rate was more distinct than the direct influence of nutrient concentation on cell diameter. There were variations in the number of central strutted processes under limited N, P, and Si conditions. The number of central strutted processes showed variations according to culture temperature showing from no central strutted process at a low temperature of
to one central strutted process at a high temperature of
. A variation of number central strutted processes occurred at a low salinity (5-10%), also. Under limited phsphate-phosphorus conditions, a variation in which the central strutted process moved toward the margin occurred. Also, seashell-shaped areolation was found. When the central strutted process shifted toward the margin, areolation changed to scallop-shaped, also. When silicate-silica was limited, the girdle of the cells elongated 3-10 times their normal length. Under low temperature conditions, a variation of the areolation to the scallop-shaped form occurred, mostly in cells with no central strutted process.
Morphotaxonomic Studies on the Korean Charophyta I. Four Taxa of Nitella Agardh New to Korea
Choi, Kwang-Chul ; Kim, Young-Hwan ; Choe, Du-Mun ;
ALGAE, volume 11, issue 1, 1996, Pages 35~35
Four taxa of the genus Niteella Agardh (Charophyta), N. acuminata Braun var. capitulifera (T.F. Allen) Imahori, N. axillaris A. Braun N. gracillima T.F. Allen and N. hyalina (D.C,) Agardh are first described from Korea. N. acuminata var. capitulifera growing in shallow water is characterized by moderately stout axes, 1-furcate sterile branchlets, terminal or axillary heads and smooth oospore membrane. N. axillaris growing at the paddy fields and ditches is characterized by slender to stout axes,1-furcate sterile branchlets, 2-celled dactyls, axillary heads and reticulate oospore membrane. N. gracillima grows in the reservoirs and ponds, particularly in clear water. It has very slender axes, 2- 4-furcate sterile branchlets, 2-celled dactyls and papillate oospore membrane. N. hyalina growing in shallow water is characterized by moderately slender axes, heteroclemous whorls and finely punctate oospore membrane. A key to the Korean species of Nitella is provided.
Morphotaxonomic Studies on the Korean Ectocarpaceae (Phaeophyta) IV. Botrytella parous (Takamatsu) comb. nov., Life History and Morphogenesis Based on Light-Temperature Gradient Culture
Kim, Hyung-Seop ;
ALGAE, volume 11, issue 1, 1996, Pages 45~45
Korean plants of brown alga Botrytella were investigated morphologically with field and laboratory cultured materials. The plane were identical with Sorocarpus parvus Takamatsu but clearly distinguished from European B. micromora Bory by the exclusively secunded branches. So, a recombined name B, parvus (Tekamatsu) comb. nov. for North East Pacific plane was proposed. From the light-temperature gradient culture, germination pattern and morphogenesis of this species were quitely different depend on culture conditions. Germlings grow more rapidly in higher light and temperature cross conditions. Growth was slow but development was almost same with wild gross morphology in lower temperature at
. In higher temperature from
, germlings grow more rapidly but their morphologies were similar with Streblomena species. The germlings repressed to production of the erect axis but enhanced to development of numerous prostrate and rhizoids at higher temperature above
. Korean plants has repeated a direct type of life histrory through plurilocular sporangia under various culture conditions. Sympodial growth was observed in culture but it was irregular as like ramisympodial branches in some red algae, which was weighted a less phylogentic significant, and that it scarcely warrants for establishment of family Sorocarpaceae by the presence of sympodial growth and true hair which occurred in other genera in Ectocarpaceae. The phylogenetic relationships among genera of Ectocarpaceae was discussed based on phenetic morphogenesis and ontogeny.
Note on the Dictyotaceae (Phaeophyta) from Ullungdo Island, Korea
Lee, Wook-Jae ; Lee, In-Kyu ;
ALGAE, volume 11, issue 1, 1996, Pages 59~59
Taxonomic account is given to the seven species of the Dictyotaceae, Dictyopteris divaricata (Okamura) Okamura, Dictyota dichotoma (Hudson) Lamouroux, Pachydictyon coriaceum (Holm.) Okamura, Padina arborescens Holmes, P. crassa Yamada, Spatoglossum paciflcum Yendo, and Zonaria diesingiana J. Agardh, collected from Ullungdo Island, Korea. Dictyopteris divaricata is distinguished that it has larger, broader and less undulated thallus. Dictyota dichotoma shows much morphological variation according to growing season. Pachydictyon coriaceum is characterized by dichotomous branch, two cell layered cortex and one large rolled medulla. Padina arborescens is distinguished by dark, hard and rarely lobed thallus and has eight to nine medullary cells. P. crassa is characterized by light brown, much lobed thallus and four to six celled medulla. Spatoglossum pacificum has variation in globs morphology according to season. Zomaria diesingiana has much lobed thallus and greenish brown, exuberant fibrous protuberance looks like midribs from cortex in basal part of thallus.
Field Studies of the Brown Alga Pelvetia siliquosa with Implications for Taxonomy and Distribution
Song, Hyun-Sook ; Seo, Kyung-Suk ; Boo, Sung-Min ;
ALGAE, volume 11, issue 1, 1996, Pages 65~65
Field observation of Pelvetia siliquosa plants were given at monthly intervals on the western coast of Korea with implications for taxonomy and distribution. Plant length and wet weight were closely related to the occurrence of receptacles, all of which had a peak in August. The fusiform receptacles known as a digscrimental character of the species were found at a low frequency throughout the year. The other morphometric features showed a wide range of variation even within a single population.
A Taxonomy of the Genus Corallina (Corallinaceae, Rhodophyta) in Korea
Kim, Ji-Hee ; Choi, Do-Sung ; Lee, In-Kyu ;
ALGAE, volume 11, issue 1, 1996, Pages 73~73
Three species of the genus Corallina (Corallinaceae, Rhodophyta), Corallina officinalis Linnaeus, C. pilulifera Postels et Ruprecht, and C. confusa Yendo, were investigated taxonomically from the coasts of Korea during June 1992 and April 1993 in order to clarify and re-evaluate the characteristics of the species. Habit, vegetative morphology, reproductive structures, and phonology were discussed on the point of taxonomic criteria. The initial separation of these three species was based on the number of tiers of medullary cells per intergeniculum. They were distinctive respectively in the prostrate lower branches, shape of intergenicula, and terminal conceptacle with antennae, as well as intergenicular length, number of tiers per intergeniculum, and number and area of epithallial cell concavity per unit area.
Morphology of Three Species of Gloiopeltis (Endocladiaceae, Rhodophyta) in Korea
Oh, Byoung-Geon ; Lee, Hae-Bok ;
ALGAE, volume 11, issue 1, 1996, Pages 81~81
The morphology of three species of Gloiopeltis, G. complanata (Harvey) Yamada, G. furcata (Postels et Ruprecht) J. Agardh and G. tenax (Turner) Decaisne from Korea was investigated and is discussed taxonomically here. All the plants of three species in Korea grow on rocks, frequently forming mats in mid-to upper intertidal zone. They are simple or branching densely dichotomously or pinnately, provided with discoidal holdfasts at base. The medulla of G. complanata and G. tenax in section consists of interlacing filaments, whereas that of G. furcata has a hollow central part. All the species are monoecious. The reproductive organs develop on upper lateral branchlets in G. complanata or on whole frond surfaces in G. furcata and G. tenax. In the three species two-celled carpogonial branches and an auxiliary cell arise together from an ampulla in inner cortex. Mature cystocarps are embedded in the thallus. Spermatangia are cut off by obliquely alternate division of spermatangial mother cells. The tetrasporangia arise from the outer cortical cells, are divided cruciately, embedded in outer cortex.
Morphological Variations of Gloiopeltis furcata (Postels et Ruprecht) J. Agardh (Rhodophyta) in the East Coast of Korea
Lee, Jae-Wan ; Oh, Byoung-Geon ; Lee, Hae-Bok ;
ALGAE, volume 11, issue 1, 1996, Pages 91~91
Plane of G. furcata from the east coast of Korea are divided into 3 types morphologically. Among them the first type, the typical, usually occurs on rocky substratum of mean seawater level in winter. The second type, G. furcata f. intricate type, grows above the zone of the first type. The third type, immature type, grows in the upper intertidal zone in late summer, but at last remained immature and dead. The second type among them, comparing with the first, are slenderer and more irregularly dichotomous in branch, but their internal structures are not different from the first. The morphological difference between the first and the second types is presumed to due to the developing time from crustose basal discs and the tidal level. The plants which had been known as G. furcata f. intricata (Suringar,1870; Okamura,1936) is turned out to be the second type of this study, a developmental variation of G. furcata.
Monosporus inkyui sp. nov. from Korea (Ceramiales, Rhodophyta)
Kim, Gwang-Hoon ; Choi, Do-Sung ;
ALGAE, volume 11, issue 1, 1996, Pages 95~95
A new species of the genus Monosporus, M. inkyui sp. nov., from Korea is described. This species has only monosporangia as a reproductive structure and is distinguished by having four-celled propagule-forming branch which bud from a distal end of axial cell and developing a propagule on a basalmost cell of the branch. When the plants were investigated in culture, a typical non-sexual life history was observed. Under various environmental conditions, it developed fertile branch with propagule consistently and only the vegetative propagule was observed for the reproductive structure.
Haraldiophyllum (Rhodophyta): a Delesseriaceous Genus Newly Recorded in Korea
Nam, Ki-Wan ; Kim, Young-Sik ;
ALGAE, volume 11, issue 1, 1996, Pages 101~101
The genus Haraldiopkyllum Zinova is newly recorded in Korea and thallus morphology and vegetative and reproductive anatomy of the type species, H. bonnemaisonii (Greville) Zinova, are described based on specimens collected from some localities of Korea. Blades am monostromatic except for basal parts. Spermatangia are cut off from the spermatangial mother cells derived from primary cell as in most delesseriaceous genera. Procarp development with one carpogonial branch and two sterile groups and post-fertilization process are essentially the same as those of Nitophyllum Greville. However, two pericentral cells in procarp-bearing central cell are produced in a direction parallel to the longitudinal axis of the blade unlike Nitophyllum. Cystocarps have extreme elaboration at lower portion of fusion cell, which forms numerous connections with content-rich cells on their floor. Tetrasporangial ni are randomly formed on both surfaces of blades. Synoptic key to Haraldiophyllum species is presented.
Taxonomy of Chondria (Rhodophyta) in Korea
Lee, Yong-Pil ; Yoon, Sang-Yong ;
ALGAE, volume 11, issue 1, 1996, Pages 107~107
Eight species of Chonldria from Korea are described. C. expansa Okamurs occurs on the bed of Corallina pillulifera community in the intertidal zone of Cheju Island. The erect axes of the plane of C. expansa are terete or compressed. The plants of terete one are more frequently found in Cheju Island. C. intertexta Silva was previously kwon as C. intricata Okamura in Korea. The pericentral cells of the plants of C. intertexta include a radial spine-form structure. C. arcuata Hollenberg, C. lanceolata Harvey and C, lancifolia Okamura are added to Korean flora. C. crassicaulis Harvey is doubtful of the affinity with the genus Chondria. The plants of C. pellucida sp. nov. was known previously as C. dasypkylla (Woodward) C. Agardh in Korea. However, the plants at hand are quite different in morphology from the type collections of the latter species. C. chejuensis. sp. nov. occurs on bed-rock slightly covered with sand in the lower tidal zone of Hengwon, Cheju Island. C. atropurpurea Harvey and C, stolonifera Okamura of which were previously reported in Korea are excluded in this study because of scanty material.
Two Species of Polysiphonia, P. scopulorum Harvey and P. flaccidissima Hollenberg (Rhodomelaceae, Rhodophyta) New to Korea
Kim, Myung-Sook ; Lee, In-Kyu ;
ALGAE, volume 11, issue 1, 1996, Pages 141~141
Two unrecorded species of marine algae in Korea, Polysiphonia scopulorum Harvey and P. flaccidissima Hollenberg, are investigated taxonomically. P. scopulorum is characterized by its very small slender form, strongly developed prostrate system attached by rhizoids in open connection with the pericentral cells, erect filaments with short segments and few branches, rare scar cells and trichoblasts, and tetrasporangia forming slightly spiral series. P. flaccidissima is characterized by its limited prostrate branches, attachment by unicellular rhizoids cut off as separate cells from proximal end of the pericentral cells, lateral branches arising in association with trichoblasts mostly at intervals of 6-10 segments, trichoblasts delicate with 1-2 dichotomies, and branches slightly narrowed at the base. Pericentral cells of the both species are ecorticate, and 4 in number.
A Study on the Blue-green Algal Toxin of the Sonaktong Reservoir
Park, Mee-Jeung ; Hwang, In-Young ; Choi, Ae-Ran ; Lee, Jin-Ae ;
ALGAE, volume 11, issue 1, 1996, Pages 149~149
We report the presence of a microcystin-type toxin in the field algal communities of the Sonaktong Reservoir. The toxin of the algal sample was identified to be a microcystin-type toxin, closely related to microcystin-LR. The algal samples were obtained in July and August 1995 from the bloom materials composed predominantly of Microcystis aeruginosa. The peak shape and retention time of HPLC chromatogram of purified materials were identical to those of an authentic microcystin-LR. The amino acid analysis of an authentic microcystin-LR and the algal sample did exhibit six amino acids in common, but not the same molar ratio. The concentration of the microcystin-type toxin in the bloom material was between
dry wt and
dry wt. There was positive relation between toxin concentrations and chlorophyll a concentrations of the bloom material. However, relations among toxin concentrations and physico-chemical environmental parameters of water column such as surface temperature, dissolved oxygen, conductivity and pH were not significant.
of the microcystin-type toxin was in the range from 0.41 to 0.92 mg dry wt/ml D. W. by
Toxicity Test. The algal cells was toxic in mouse bioassay with an
i.p. of 150-700 mg/kg body wt.
Effect of Ultraviolet-B Radiation on Ulva pertusa Kjellman (Chlorophyta) I. Growth and Pigment Content
Han, Tae-Jun ;
ALGAE, volume 11, issue 1, 1996, Pages 155~155
Discs cut from thallus of the intertidal a1ga, Ulva pertusa were exposed in the laboratory to UV-B radiation of similar irradiance to the ambient levee
measured on a clear day in September,1995. the fresh weight, surface area and cell area were unaffected by the various durations of UV exposure whereas the total chlorophyll content was significantly reduced by approximately 50% after only 2 h irradiation. Chlorophyll destruction by UV-B is likely to be a function of a cumulative dose. The UV-absorbing pigment contents fell proportionally with the total chlorophylls. UV-irradiated thalli showed a 10% higher transmittance in the 280-400 nm waveband range than non-irradiated thalli, suggesting that some of the cellular components might have been disturbed in the former.
Diel Changes in Vertical Distributions of Microcystis in the Sonaktong Reservoir
Choi, Ae-Ran ; Park, Mee-Jeung ; Lee, Jin-Ae ; Chung, Ik-Kyo ;
ALGAE, volume 11, issue 1, 1996, Pages 161~161
Observation was made over 24 hour periods on August 28-29, 1995 to elucidate the diel changes of vertical distribution of Microcystis, which formed dense scum in the Sonaktong Reservoir, Korea. The profiles of chlorophyll a concentration provided a discernable diel vertical distributional pattern, which were mostly related to the changes of wind velocity. The increase in ambient pH was involved in the scum formation, and nutrient limitation was not important for the diel change of vertical distribution of Microcystis. There was highly significant relationship between FDC and chlorophyll a concentration of algal scum at the water surface, and high algal cell division rates were attributed to the development of algal scum. The mortality of Microcystis was assumed to be involved in weakening of the scum. The ultrastructure of Microcystis aeruginosa showed that the gas vesicles were the most prominent structure.
Diversity and Abundance of Sublittoral Macroalgae around Daedo Island, the South Coast of Korea
Kim, Kwang-Young ; Huh, Sung-Hoi ; Kim, Gwang-Hoon ;
ALGAE, volume 11, issue 1, 1996, Pages 171~171
Diversity and abundance of sublittoral vegetation were investigated at 3 sites around Daedo Island in September and October 1994. In total, 51 taxa of red, 19 brown and 10 green a1gae were identified. The number of species decreased with increasing depths. Ulva pertusa, Sargassum thunbergii, Corallina pilulifera and C. officinalis occurred with highest cover and frequency in the upper to mid sublittoral. The cover and frequency values for 5. horneri, Gelidium amansii and Ecklonia cava were generally high in the mid to lower sublittoral, although the main habitat of the species occurred in very wide vertical range. The biomass of deeper zone was composed mainly of a few brown algae. Diversity and abundance of sublittoral vegetation were correlated to the light, substrate characteristic and tidal currents.
Influence of Light Intensity and Temperature on Callus Cell Propagation and Differentiation to Bladelets from the Explants of Young Sporophyte of Kjellmaniella crassifolia Miyabe (Phaeophyta, Laminariales)
Notoya, Masahiro ; Kim, Hyung-Geun ;
ALGAE, volume 11, issue 1, 1996, Pages 179~179
Excised rectangular blade pieces
from young sporophytes (3-5 mm in blade length) of Kjellmaniella crassifolia Miyabe were cultured under various light intensities
to observe callus cell propagation and differentiation. Favorable culture conditions of callus cell propagation from blade pieces were found to be at
. However, under conditions of low temperature and low light intensity, callus cells did not differentiate to bladelets. Differentiation of callus cells to bladelets was observed only at a hish light intensity of
. In dark conditions, the callus cells propagated within 16 days, but could not grow after that. Under high light intensities, chloroplasts in the callus cell increased in both size and number, and then the callus cell differentiated to the bladelet. The results suggested that differentiation of the bladelet is related to chloroplasts in the callus cell.