• 한국수산과학회지
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• 제35권3호
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• pp.242-246
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• 2002

부산의 기장군 지역 조하대에 폭넓게 분포하는 무절석회조류의 한 종인 납작돌잎 (Lithophyllum yessoense)을 대상으로 하여 사분포자의 배양환경에 따른 생장과 사분포자 방출량을 정량화 함으로써 포자방출 양상을 구명하고자 하였다. 포자의 배양실험은 2000년 3월에 채집한 납작돌잎 사분포자체로부터 사분포자를 받아 수행하였다. 배양조건은 온도는 5조건 (5, 10, 15, 20, $25^{\circ}C$), 광량은 4조건 (0, 20, 50, 100$\mu$mol${\cdot}m^{-2}$${\cdot}s^{-1}$)과 염분농도는 6조건 (0, 9, 17, 25, 34, 43 ppt) 하에서 각각 포자의 상대생장률을 측정하였다. 월별 포자방출의 정량화는 2000년 8월부터 2001년 7월까지 매월 시료를 채집하여 50${\mu}mol\;m^{-2}s^{-1},\;15^{\circ}C$과 16:8h (L:D) 조건하에서 48시간 동안 방출된 포자의 총 수를 계수하였다. 배우체의 최적 생장 조건은 $20^{\circ}C$, $20{\mu}mol m^{-2}. s^{-1}$과 34ppt조건이었으며, 최대 상대생장률은 $20^{\circ}C$ 조건에서 0.1232였다. 포자의 방출량은 9월에 사분포자체 단위면적 ($cm^2$) 당 266개로 최고치를 보였고, 연중 1월부터 3월까지의 시기를 제외한 모든 시기에 포자가 방출되는 것으로 나타났다.

• ALGAE
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• 제23권1호
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• pp.71-74
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• 2008

Catenella impudica (Mont.) J.Ag is an important species for human consumption from estuarine regions of Asia. Seasonal shedding of carpospores and tetraspores was quantified between January and December 2004 for natural populations of C. impudica. Vegetative and tetrasporophytic plants were available throughout the year but gametophytic plants were observed only from September to May. Tetraspore shedding was observed throughout the year and carpospores shedding was noticed only during the months when material was available. Hydrographical conditions of the estuary such as low water temperature and low salinity are correlated to the formation and release of carpospores and tetraspores in C.impudica

• ALGAE
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• 제20권4호
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• pp.315-324
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• 2005

Anatomical organization of Stoechospermum marginatum reveals small cortical cells with moderately dense cytoplasm, overlying a multilayered medulla comparatively poor in cytoplasmic contents. The anticlinal walls of cortical cells show local thickenings rich in alginic acids. Sori form on both thallus surfaces and show tetrasporangia, paraphyses and sterile-cells. The unicellular paraphyses are rich in sulphated polysaccharides whereas multicellular ones have abundance of not only polysaccharides, but also of vacuoles and phenols. The sterile-cells are modified cortical cells present on either side of the tetrasporangium and bear cytoplasmic strands towards soral cavity. Various stages of tetrasporogenesis are seen in a single sorus. The developing tetrasporangium shows a two layered wall, where the outer one is rich in alginic acid and inner has sulphated polysaccharides. An apical pad aids tetraspore release. Also involved in the release process are sterile-cells, paraphyses and polysaccharides.