• 생명과학회지
• /
• 제23권3호
• /
• pp.341-346
• /
• 2013

연안 암반지역에서 해조류 군락의 소실 즉 백화 혹은 갯녹음현상은 산호조류와 관련성이 있다. 대표적인 무절산호조의 생물학적 특성을 파악하기 위하여 18S rDNA 유전자를 분석한 결과 혹돌잎(Lithophyllum) 속에 속하는 것을 확인하였고 그 형태적 특성으로 보아 L. yessoense 종인 것으로 유추된다. Triphenyl tetrazolium chloride로서 활력을 측정한 결과 12월에서 2월 사이가 가장 높았으며, 조직 활력을 유지하기 위하여는 $16^{\circ}C$, 16:8 시간 명암 광주기, 30 ${\mu}E/m^2/s$ 광도에서 5일간 최적상태를 보였다. 지방산 조성에서는 EPA가 가장 많은 고도불포화지방산으로서 9.7%를 차지하고 있다. 주사형전자현미경에 의한 표면구조를 보면 평균 3.6 ${\mu}m$ 직경의 둥근 함몰 분화구 모양을 이루며 그 위에 1.0 내지 3.7 ${\mu}m$의 비정형 다각형 구조물들이 덮여져 있다. 이 같은 조성과 구조를 바탕으로 한 생체모방 산호조는 해조류 등에 대한 환경친화적 방오소재로서 활용되어질 수도 있을 것이다.

• 한국잡초학회지
• /
• 제13권1호
• /
• pp.1-6
• /
• 1993

논에 발생(發生)하는 주요(主要) 조류(藻類)의 번식(繁殖)에 미치는 시비(施肥) 및 염분농도(鹽分濃度)의 영향(影響)과 약제방제법(藥劑防除法)을 구명(究明)하기 위한 시험(試驗)을 1991년 수행하여 다음과 같은 결과(結果)를 얻었다. 1. 남조류(籃藻類)인 흔들말(Oscillatoria)의 발생량(發生量)은 질소비료(窒素肥料)의 증시(增施)에 따라 증가(增加)하였고 녹조류(綠藻類)인 그물말(Hydrodictyon)의 발생량(發生量)은 인산비료(燐酸肥料)의 증시(增施)에 따라 증가(增加)하였다. 2. 그물말은 질소비료(窒素肥料)에 극(極)히 민감(敏感)하여 질소비료(窒素肥料)의 증시(增施)에 따라 민감장해(敏感障害)를 일으켰다. 3. 유그레나도 다량(多量)의 질소비료(窒素肥料) 시용(施用)으로 번식장해(繁殖障害)를 보였으나 그물말에 비(比)하여 민감(敏感)하지는 않았다. 4. 흔들말, 클라도포라 및 깃돌말(Navicula)은 내염성(耐鹽性)을 보였다. 5. Piperophos/dirnethametryn은 정체성(靜滯性) 녹조류(綠藻類)인 그물말과 부유성(浮遊性) 단세포(單細胞) 녹조류(綠藻類) 및 유그레나의 방제(防除)에 효과(效果)가 높았고 propineb와 류산동(硫酸銅)도 그물말에 대(對)하여 높은 방제효과(防除效果)가 인정(認定)되었다.

• 한국광과학회:학술대회논문집
• /
• 한국광과학회 1998년도 학술대회지
• /
• pp.12-13
• /
• 1998

• 한국동물학회:학술대회논문집
• /
• 한국동물학회 1995년도 한국생물과학협회 학술발표대회
• /
• pp.335.1-335
• /
• 1995

No Abstract, See Full Text

• 한국어업기술학회:학술대회논문집
• /
• 한국어업기술학회 1998년도 수산관련공동학술대회발표요지집
• /
• pp.355-356
• /
• 1998

• Bulletin of the Korean Chemical Society
• /
• 제9권4호
• /
• pp.264-266
• /
• 1988

• Fisheries and Aquatic Sciences
• /
• 제2권1호
• /
• pp.25-31
• /
• 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.

• Animal cells and systems
• /
• 제3권3호
• /
• pp.243-246
• /
• 1999

A type of symbiosis was previously described from nature in which the gametophytes of Laminariales were endophytic in filamentous red algae. Here we reconstruct this symbiosis for the first time in laboratory culture using zoospores of the kelp, Undaria pinnatifida, and the red alga, Aglaothamnion oosumiense. Zoospores of U. pinnatifida readily attached to A. oosumiense. In 48 h these spores germinated and the initial germ tube penetrated into the host cell wall leaving only an empty zoospore wall outside the host. Within ten days, four to five-celled endophytic gametophytes were present. Zoospores of Laminaria religiosa which were also inoculated into cultures of A. oosumiense rarely attached to the red alga and never became endophytic. Within ten days the free-living gametophytes of L. religiosa on cover slips became fertile and produced young sporophytes. These observations demonstrate the ability of U. pinnatifida to become endophytic, and show differences in host specificity among kelp species.

• Biotechnology and Bioprocess Engineering:BBE
• /
• 제8권6호
• /
• pp.331-337
• /
• 2003

Unicellular green algae of the genus Dunaliella thrive in extreme environmental conditions such as high salinity, low pH, high irradiance and subzero temperatures. Species of Dunaliella are well known in the alga biotechnological industry and are employed widely for the production of valuable biochemicals, such as carotenoids. Some strains of Dunaliella are cultivated commercially in large outdoor ponds and are harvested to produce dry algal meals, such as polyunsaturated fatty acids and oils for the health food industry, and coloring agents for the food and cosmetic industries. During the past decade, the advances in molecular biology and biochemistry of microalgae, along with the advances in biotechnology of microalgal mass cultivation, enabled this microalga to become a staple of commercial exploitation. In particular, the advent of molecular biology and mutagenesis in Dunaliella has permitted enhancements in the carotenoids content of this green alga, making it more attractive for biotechnological applications. Accordingly, the present review summarizes the recent developments and advances in biotechnology of carotenoid production in Dunaliella.

• ALGAE
• /
• 제19권3호
• /
• pp.191-199
• /
• 2004

Morphological and phonological characteristics of brown alga Spatoglossum crassum Tanaka new to Korea were described based on the field and the indoor cultured plants. The taxonomic characteristics of the plants were agreed to those from the type locality-submerged reproductive organs in cortex, anatomical features, and absence of phaeophycean hairs on the surface. But they have rudimentary midrib on lower portion of thallus. We can observe the young plants on November, adult ones in June, and senile ones in August. This species has an annual life-cycle in the field, starting with germ lings in early November. The differentiation of thallus is quite different from other species of genera in tribe Zonarieae, e.g. Zonaria and Homoeostrichus. Three different tissues, meristoderm, cortex and medulla are discerned. The outmost cortical one celled layer as a meristoderm produce cortex by unequal periclinal division. In the apical cell division, the primary inner cells are developed into 3-4 cell layered medulla of thallus. The distribution of this species extends from Korea to Shizuoka Peninsula (34°40'N) Japan, which is the type locality of this species.