• Bulletin of the Korean Chemical Society
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• v.28 no.10
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• pp.1831-1833
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• 2007

• Fisheries and Aquatic Sciences
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• v.7 no.2
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• pp.96-98
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• 2004

• ALGAE
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• v.38 no.2
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• pp.151-157
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• 2023

Grateloupia turuturu is a red alga with a flat but firm slippery thallus. Throughout its lifetime, this alga experiences a wide range of environmental stresses in the intertidal rocky shores. The aim of this study is to investigate the effect of salinity and irradiance on the early developmental stages of G. turuturu tetrasporophytes. The released carpospores were cultivated at different salinities (S = 15, 25, and 35) and irradiances (50, 100, and 200 μmol photons m^-2 s^-1). Germination of carpospores and development of juvenile tetrasporophytes were observed every 5 days and recorded by a digital camera. Discoid crusts were formed at all conditions within 5 days. The discoid crusts at 200 μmol photons m^-2 s^-1 died within 20 days regardless the salinity. The discoid crusts at S = 35 also died at all irradiance conditions within 25 days. Except for those at S = 35 and 200 μmol photons m^-2 s^-1, the discoid crusts reached about 8,000-9,000 ㎛² by day 20. Regardless of irradiance, the upright thalli formation rate from discoid crusts was 85 and 10% at S = 15 and S = 25, respectively. These results suggest that salinity and irradiance are important factors influencing early developmental stages of G. turuturu.

• Fisheries and Aquatic Sciences
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• v.2 no.1
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• pp.25-31
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• 1999

Developmental morphology of the red alga, Osmundea crispa (Hollenberg) Nam from California was studied on the basis of liquid-preserved and herbarium specimens. Vegetative axial segment of the species produces two pericentral cells and one trichoblast. Spermatangial filaments (branches) are derived from apical and epidermal cells in pocket-shaped apical pit with an ostiole-like upper opening. Procarp-bearing segment of female trichoblast produces five pericentral cells, of which the fifth functions as supporting cell of carpogonial branch. Tetrasporangial production occurs in random epidermal cells in apical pit of branchlets, and two presporangial cover cells show parallel arrangement to stichidial axis. As this vegetative and reproductive development is included in the generic delineation of Osmundea Stackhouse, O. crispa among the known Osmundea species is characterized by habit forming compact cushion-like clump with angular to terete thallus. It is also distinguished from O. hybrida (AP. de Candolle) Nam without the compressed thallus by the number of pericentral cells in procarp-bearing segment and shape of spermatangial pit. Taxonomic implication of the shape of spermatangial pit is also included.

• Ocean and Polar Research
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• v.25 no.4
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• pp.569-591
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• 2003

Marine benthic flora was investigated in an Arctic bay. Specimens of chlorophyte, phaeophyte, and rhodophyte were collected and examined over the period from July to August 2003 from Kongsfjorden Spitsbergen in Svalbard Islands. A total of 28 genera and 32 species (5 chlorophytes, 18 phaeophytes, and 9 rhodophytes) was identified and described. A green alga Enteromorpha linza(Linnaeus) J. Agardh, a brown alga Asperococcus compresus Griffiths ex Hooker, and three red algae Gracilaria gracilis (Stackhouse) Steentoft et al., Rhodymenia pacifica Kylin and Schizochlaenion rhodotrichum Wynne et Norris were recorded in Svalbard Islands for the first time.

• Journal of the Korean Chemical Society
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• v.33 no.3
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• pp.321-325
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• 1989

There has been a continuing interest in the sterols and sterodis of marine organisms. The most exciting results of recent studies have been the characterization of a host of novel sterols, many with unique alkylation patterns in the side chain, but some with modified ring structures. The isolation and characterization of three sterols from the Korean alga codium fragile are presented. The major sterol was (24S)-24-ethylcholesta-5,25-dien-3${\beta}$-ol (clerosterol) and two minors are codisterodl and cholesterol.

• Bulletin of the Korean Chemical Society
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• v.20 no.10
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• pp.1121-1122
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• 1999

• Journal of the Korean Chemical Society
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• v.48 no.4
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• pp.394-398
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• 2004

From Sargassum thunbergii which is widely distributed in coastal area of Korea, three norisoprenoids, (+)-epiloliolide (1), (-)-loliolide (2), and apo-9'-fucoxanthinone (3) were isolated by using column chromatography and reverse-phase HPLC. Compound 1, 2 and 3 were for the first time isolated from the Brown Alga Sargassum thunbergii. Particularly, Compound 1 was for the first time isolated the marine organism although it was reported from the terrestrial plant. Their structures have been determined by extensive 2-D NMR experiments such as $^1H COSY, NOESY, HMQC$, and HMBC and by comparison with the reported data in the literature.

• Korean Journal of Environmental Biology
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• v.35 no.3
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• pp.341-344
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• 2017

The delesseriacean parasitic red algal Asterocolax species was collected from Jindo in the southern coast of Korea. This parasitic species found on Pseudopolyneura japonica. And it is distinct from other species of Asterocolax with more or less denticulate branches when matured. This Korean entity is identified as Asterocolax denticulatus (Tokida) Feldmann & Feldmann (Delesseriaceae, Rhodophyta) based on these features. This is the first record of A. denticulatus in Korea.

• Journal of Plant Biology
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• v.15 no.1
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• pp.13-22
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• 1972

In the present paper, seven marine algae collected from the coasts of Korea are described. The two blue-green algae, Coccochloris stagnina Sprengel and Entophysalis conferta (Kuetz.) Drouet and Daily, one brown alga, Ralfsia verrucosa(Aresch.) J. Ag., and the two red algae, Enelittosiphonia hakodatensis (Yendo) Segi and Symphyocladia pennata Okamura, are recorded newly in our country. The other two blue-green algae, Anacystis dimidiata (Kuetz.) Drouet and Daily and Phormidium tenue (Meneghini) Gomont, are recorded for the first time marine water in our country.