• Title, Summary, Keyword: Furcata

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A Taxonomic and Ecological Study of Gloiopeltis furcata J. Agardh (Rhodophyta) in Korea

  • Lee, Jae-Won
    • Journal of Plant Biology
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    • v.38 no.2
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    • pp.165-171
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    • 1995
  • Plants of G. furcata were divided into four variant populations. The habit characteristics, external and internal morphology were analysed quantitatively in order to clarify their morphological variation. Among four variant populations, type I(typical G. furcata type) and type II(G. furcata f. intricata type) may be influenced by the time when the develop from the crustose basal discs and the tidal level. Type III is the immature plants, and type IV (G. furcata f. coliformis type) is a G. furcata population in late spring after the luxuriant season. For the reason, the formas of G. furcata f. intricata and f. coliformis are no more valid in Gloiopeltis furcata.

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Relationship between Phycoerythrin and Nitrogen Content in Gloiopeltis furcata and Porphyra yezoensis

  • Hiroyuki Mizuta
    • ALGAE
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    • v.17 no.2
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    • pp.89-93
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    • 2002
  • Seasonal changes of pigment compositionin two intertidal red algae, Gloiopeltis furcata (Postels et Ruprecht) J. Agardh, and Porphyra yezoensis Ueda, were investigated. Chlorophyll α and phycoerythrin levels were high during winter, but decreased in late spring or summer, with accompanying discoloration from deep red to green or yellow. This discoloation corresponded closely to the fluctuationof phycoerythrin content. Nevertheless, photosynthesis capacity was maintained by the increasing water temperature in the field, suggesting that large amounts of phycoerythrin are not necessary for photosynthesis. Phycoerythrin conten correlated significantly with nitrogen content in both species when the nitrogen level was greater than the level of critical content (1.30% DW in G. furcata, and 2.26% DW in P. yezoensis), indicating that phycoerythrin plays a more important role in the nitrogen status as a nitrogen pool than that of nitrogen critical content. Furthermore, the dependence level of the alage on phycoerythrin as a nitrogen pool was greater in P. yezoensis than in G. furcata because of the remarkable increase of phycoerythrin content in P. yezoensis with increasing jnitrogen content.

Response of Achlya racemosa, A. proliferoides and Saprolegnia furcata to Sub-lethal Treatments of Amino Acids

  • Ali, Esam H.
    • Mycobiology
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    • v.31 no.2
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    • pp.86-94
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    • 2003
  • The effect of four sub-lethal concentrations(400, 800, 1,200 and 1,600 ${\mu}g/ml$) of three amino acids such as isoluecine, aspartic acid and phenylalanine on vegetative growth and sexual and asexual reproduction of Achlya racemosa, A. proliferoides and Saprolegnia furcata was investigated. The density of vegetative growth and diameters of vegetative colonies of species of the Oomycetes fungi decreased with rising the concentration of the applied amino acid. Vegetative hyphae of treated fungi almost appeared branched in case of S. furcata, thick in case of A. racemosa and distorted in case of A. proliferoides as compared with control. The different treatments with amino acids depressed both sporangial formation and discharge, which were dependent on the tested species of zoosporic fungi, the amino acid and its dosage. Phenylalanine was the most effective amino acid in inhibiting sporulation and S. furcata was the most sensitive fungal species. Aspartic acid and isoleucine stimulated germination of discharged spores through the formation of germlings. Gemmae formation by the three fungi was reduced at the low concentrations of amino acids and nearly missed at high concentrations. Sex organs(oogonia and antheridia) were affected partly; rudiment oogonia were observed at low concentrations(400 and 800 ${\mu}g/ml$) and disappeared at higher concentrations, whereas antheridial branch formation was stimulated as the fungi were treated with isoleucine and to some extent phenylalanine.

Community Dynamics of the Benthic Marine Algae in Hakampo, the Western Coast of Korea

  • Yoo, Jong-Su;Kim, Young-Hwan
    • Korean Journal of Environmental Biology
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    • v.21 no.4
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    • pp.428-438
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    • 2003
  • Benthic marine algal community of Hakampo in the western coast of Korea was investigated qualitatively and quantitatively. Seasonal assessments of species composition, biomass, dominant species in biomass and vertical distributional pattern were carried out from spring to winter. A total of 121 species was identified; 6 blue-green, 18 green, 16 brown, 81 red algae. In three sites investigated, 96 species were collected at Bunjeomdo, 75 at Maoe, and 57 at Doranggol, respectively. Dermocarpa sp. and Acrochaetium microscopicum were collected for the first time in Korea through this investigation. Dominant species in specific proportions of biomass were Sargassum thunbergii, Gloiopeltis furcata, Corallina spp., Symphyocladia latiuscula and Monostroma nitidum. Seasonal fluctuations of mean biomass were 31.59-427.69 g dry wt$.$$\mu \textrm m^{-2}$ at Bunjeomdo and 20.98-473.48 g dry wt$.$$\mu \textrm m^{-2}$ at Maoe, respectively, which were comparatively high in the western coast of Korea. Vertical distribution in intertidal zones was Gloiopeltis furcata-Gloiopeltis furcata and Corallina spp.-Corallina spp. and Sargassum thunbergii.

Immune-enhancing effects of polysaccharides with different molecular weights obtained from Gloiopeltis furcata (불등풀가사리 다당류의 분자량에 따른 면역증강 효과)

  • Lee, Dae-Hoon;Hong, Joo-Heon
    • Korean Journal of Food Preservation
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    • v.25 no.1
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    • pp.1-6
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    • 2018
  • This study investigated the immune-enhancing effects of polysaccharides extracted from Gloiopeltis furcata (red seaweed) with different molecular weights. A crude polysaccharide mixture was hydrolyzed using acid treatment (0.1 N HCl) and three molecular weight fractions were generated and filtered using centrifugation: (${\leq}10kDa$, 10 to 100 kDa, and 100 kDa. Nitric oxide (NO) production in RAW264.7 cells treated with $0.01-0.5{\mu}g/mL$ polysaccharides ${\geq}100kDa$ was $12.28-19.05{\mu}M$. Treatment with polysaccharides ${\geq}100kDa$ increased cytokine levels, including TNF-${\alpha}$ and IL-6 levels, in a dose-dependent manner. Polymerase chain reaction analysis also revealed marked increases in iNOS and COX-2 mRNA expression levels. These findings lead us to conclude that macrophage activation induced by polysaccharides ${\geq}100kDa$ was greater than that induced by polysaccharides ${\leq}10kDa$ or between 10 and 100 kDa. The polysaccharides ${\geq}100kDa$ extracted from Gloiopeltis furcata investigated herein are potentially useful as natural immune-enhancing agents. These findings provided further insights into the potential use of ${\geq}100kDa$ as immunopotentiator or new function food.

Antimicrobial Activities of Korean Marine Algae against Fish Pathogenic Bacteria (한국산 해조류의 어류병원성세균에 대한 항균활성)

  • Kang, So-Young;Oh, Myung-Joo;Shin, Jong-Ahm
    • Journal of fish pathology
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    • v.18 no.2
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    • pp.147-156
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    • 2005
  • To obtain antimicrobial algae against fish pathogenic bacteria, we screened 80% methanolic extracts of 30 algae using fish pathogenic bacteria, Staphylococcus sp., Streptococcus sp., Edwardsiella tarda and Vibrio anguillarum. Among them, Corallina officinalis, Dumontia simplex, Gloipeltis furcata, Grateloupia lanceolata and Grateloupia turuturu were effective for growth inhibition of a Gram-positive bacterium, Staphylococcus sp.. Sargassum thunbergii and Polysiphonia morrowii exhibited significant inhibitory effects against the growth of Gram-negative bacteria, both E. tarda and V. anguillarum. Moreover, antimicrobial activity-guided fractionation for P. morrowii extract yielded significantly active 90% methanolic fraction. This fraction significantly inhibited the growth of E. tarda exhibiting a MIC of 1 mg/ml. In addition, its antimicrobial activity was stable under various pH conditions.

PHYTOSOCIOLOGICAL STUDY OF MARINE ALGAE AT ODONG-DO (오동도의 해조 군락)

  • SONG Sang Ho
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.4 no.3_4
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    • pp.105-112
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    • 1971
  • The annual variation of algal vegetation at two reefs, A and 3, of Odong-do, Yeosu, was observed two times each month during the period from June 1970 to May 1971, and the results obtained are as follows : 1. The total number of the algal species occurred were 69 species, of which 12 species belong to Chlorophyceae, 17 species to Phaeophyceae and 40 species to Rhodophyceae. No significant difference was noticed in the occurrence number of algal species at the reefs observed. 2. Most species of the algal communities in each algal belt did not show seasonal variations, but the following species showed fluctuations iii cover degree : Ulva pertusa, Enteromorpha sp., Sphacelaria sp., Scytosiphon iomentaria, Colpomenia sinuosa, Sargassum thunber gii, Pterocladia tenuis, Amphiroa ephedrea, Carpopeltis affinis, Gigartina tenera, Polysiphonia yendoi, Chondria crassicaulis, Symphyocladia atiuscula. 3. The species occurred in each algal belt at all two reefs did not show much variations and the main species in each belt are as follows: $200\~150cm$ belt - Gloiopeltis complanata, G. furcata, Enteromorpha sp., etc. : $150\~100cm$ belt - Ulva pertusa, Chondria crassicaulis, Sargassum thunbergii, etc. ; $100\~50cm$ belt - Gigartina tenera, Pterocladia tenuis, Scytosiphcn lomentaria, Polysiphonia yendoi, etc ; Below 50cm- Sargassum sagamianum, Cystophyllum sisymbrioides, Gelidium amansii, Acresorium yendoi, Microcladia elegance, etc. 4. The species occurred below 100cm level were almost the same at A and B reefs, but those above 100cm level at the A leef were different from the B reef; th: species of the algal belt of reef A were composed of Gloiopeltis complanata, Corallina pilulifera, Chondria crassicaulis, Sargassum thunbergii, Polysiphonia yendoi, Ulva Pertusa, etc., and those of reef B were composed of Gloiopeltis complanata, G. furcata, Enteromurpha sp. and Ulva pertusa, thus the main composition of reef B was very simple. 5. According to Taniguti's classification of marin: algal com nunity, the reefs observed belong to the Gigartina intermedia-Sargassum sagaminnum association (Sargasseto-Gigartinetum Taniguti) of Myelophycus caespitosus alliance (Myelophycion Taniguti).

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Trace Components and Functional Saccharides in Seaweed-1 -Changes in Proximate Composition and Trace Elements According to the Harvest Season and Places- (식용해조류중의 미량요소와 특수기능성 당질-1 -산지와 채취시기별 일반성분의 조성과 무기원소의 분포-)

  • CHO Deuk-Moon;KIM Doo-Sang;LEE Dong-Soo;KIM Hyeung-Rak;PYEUN Jae-Hyeung
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.28 no.1
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    • pp.49-59
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    • 1995
  • Nine species of edible seaweed [green laver (Monostroma nitidium) and sea staghorn ( Codium fragile) of green algae; sea mustard (Undaria pinnatifida), seaweed fusiforme(Hizikia fusiforme), gulf weed (Sargassum fulvellium), and sea tangle (Laminaria japonica) of brown algae; seaweed dilatata (Halimeniopsis dilatata), seaweed furcata (Gloiopeltis furcata), and laver (Porphyra tenera) of red algae] collected from Kijang, Chungmu, and Yosu in Korea, were examined and compared on their chemical and mineral composition depending on their harvesting season. Crude protein $(N\pm6.25)$ showed about $45\%$ on moisture free basis (the contents of every components described below are shown as moisture free basis) for laver and $30\%$ for green laver collected from ever seasons and sites. Sea tangle showed the highest content in crude lipid $(10\%)$ among brown seaweeds and green laver had $6\%$ of crude lipid regardless their habitats. Ash and carbohydrate in sea staghorn hold about $90\%$ of total solids but those levels were only $50\%$ in laver. The relationship between ash and carbohydrate content showed a tendency with reverse correlation. Mineral compositions were examined on green laver, sea mustard, and seaweed furcata collected from Kijang. Sodium was eminent element (1,798-7,334mg/l00g) followed by potassium. Magnesium and calcium content were low level compared with sodium and potassium. As a micro-element iron was appraised the highest status (165-330mg/100g) in green laver, however, iron in sea mustard and seaweed furcata was comparatively low amount (2.7-47.4mg/100g). The level of zinc was also comparatively high and that was varied on habitats. In conclusion, chemical compositions of these algae were distinctively varied on species and habitats, and mineral compositions were notably changed by the harvesting season.

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Biological activities and physicochemical properties of polysaccharides from Gloiopeltis furcata prepared by using various enzymes (효소종류에 따른 불등풀가사리 유래 다당류의 이화학적 특성 및 생리활성)

  • Lee, Dae-Hoon;Hong, Joo-Heon
    • Korean Journal of Food Preservation
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    • v.24 no.3
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    • pp.455-463
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    • 2017
  • In this study, the biological activities and physicochemical properties of polysaccharides from Gloiopeltis furcata were investigated. Polysaccharides were isolated by enzymes treatment (celluclast, flavourzyme, papain, termamyl, viscozyme) followed by ethanol precipitation and lyophilization. The yield of polysaccharides by enzymes treatment group were 52.8-66.4%. The major constituents in viscozyme treatment group were total sugar (71.04%), protein (7.22%), uronic acid (23.18 g/100 g), and sulfate (28.27%), respectively. The DPPH radical scavenging activity and ferric reducing antioxidant potential of the viscozyme treatment group at 5 mg/mL were 23.10% and $218.50{\mu}M$, respectively. The protective effects against $H_2O_2$-induced cytotoxicity in L132 cell of viscozyme treatment group at $1{\mu}g/mL$ was 85.64%. The viscozyme treatment group increased the production of nitric oxide (NO) in a dose-dependent manner. The antitumor activity of viscozyme treatment group (at $25{\mu}g/mL$) in A549, HeLa, SNU719 and MCF7 was 69.57%, 52.74%, 61.06% and 68.64%, respectively. All of data showed that the biological activities and chemical characteristics of enzymes treatment group are higher than that of the control group. The polysaccharides isolated from Gloiopeltis furcata investigated herein are useful as functional materials agents.