闽南—台湾浅滩渔场微型硅藻的分类研究

利用透射电镜（ＴＥＭ）研究闽南－台湾浅滩渔场的微型硅藻时,鉴定出１４个在我国首次的种类,它们是：极小曲壳藻（Ａｃｈｎａｎｔｈｅｓ ｍｉｎｕｔｉｓｓｉｍａ）,分岐双壁藻（Ｄｉｐｌｏｎｅｉｓ ｄｉｖｅｒｇｅｎｓ）、槌棒脆杆藻（Ｆｒａｇｉｌａｔｉａ ｏｐｅｐｈｏｒｏｉｄｅｓ）、微细脆杆藻（Ｆｒａｇｉｌａｒｉａ ａｔｏｍｕｓ）、折断舟形藻（Ｎａｖｉｃｕｌａ ｆｒａｃｔａ）、虫瘿舟形藻（Ｎａｖｉｃｕｌａｇａ     

利用螺旋藻富集碘的实验

本文研究了碘化钾 (KI)对极大螺旋藻 (Spirulinamaxima)生长的影响以及碘在细胞中的富集作用 .结果表明 :在 0～ 40 0mg/dm3范围内 ,KI对螺旋藻的生长没有明显的抑制作用 ,在较低的含量内甚至有一定的促进作用 .极大螺旋藻的最高KI耐受范围在 40 0 0～ 50 0 0mg/dm3之间 .螺旋藻细胞中的碘含量与培养液中外加的KI含量有一定的关系 ,在KI添加含量为 90 0mg/dm3时 ,螺旋藻的收获量 (2 77.1 7mg/dm3)比对照组 (1 0 4.47mg/dm3)增加 1 65%,藻细胞碘含量[0 .3 3 1× 1 0 -2 (m/m) ]比对照组 [0 .0 2 5× 1 0 -2 (m/m) ]增加约 1 2倍 .     

DISTRIBUTION OF DIATOMS IN CONTINENTAL SHELF OF THE EAST CHINA SEA

From the continental shelf of the East China Sea, we have collected and recorded 157 taxa of planktonic diatoms, of which 57 are tropical species, 20 temperate species, 73 widely distributed species and 7 remain to be further investigated for their habitats. Chaetoceros peruvianus f. robusta, Chaet. setoenis, Rhizosolenia alata f. curvirostris and Triceratium campeachlanum are four species recorded for the first time in China.The diatoms flora in the present region is mainly warm-water in nature and is very much similar to that in the South China Sea but differs greatly from that in the Huanghai Sea. Gossle-riella tropica (30°00′ - 32°00′ N, 127°20′ - 128°30′E) and other warm-water floras are present in the waters due to the effect of the Tsushima Warm Current.     

东海表层沉积硅藻

1977年国家海洋局组织所属单位对东海大陆架进行了综合调查,采集了比较丰富的样品.有关资料报导了在东海大陆架有12种硅藻的记录,大陆坡11种,海槽区12种,如归并重复出现的种类,总计有20种硅藻.本文基本上用同一批材料对沉积硅藻的沉积问题,提出了我们的一些看法.     

西沙群岛海洋硅藻的研究

在西沙群岛潮间氏栖硅藻的研究中发现了１个新种－－三波胸隔藻Ｍａｓｔｏｇｌｏｉａ ｔｒｉｕｎｄｕｌａｔａ ｓｐ．ｎｏｖ．和５个新记录：楔形胸隔藻Ｍａｓｔｏｇｌｏｉａ ｃｕｎｅａｔａ ｓｉｍｏｎｓｅｎ，红胸隔藻椭圆变种Ｍａｓｔｏｇｌｏｉａ ｅｒｙｔｈｒａｅａ ｖａｒ．ｅｌｌｉｐｔｉｃａ Ｖｏｉｇｔ，红胸隔藻格鲁变种Ｍａｓｔｏｇｌｏｉａ ｅｒｙｔｈｒａｅａ ｖａｒ．ｇｒｕｎｏｗｉｉ Ｆｏｇｅｄ，ｘｕｗｌ     

Toxicity and Accumulation of Selenite in Four Microalgae

The toxicity and bioaccumulation of selenite in four microalgae, Spirulina platensis,Dunaliella salina, DunalieUa bardawill and Phaeodactylum tricornutum cultured in the presence of selenite were investigated. Lower concentrations of selenite were generally nontoxic and frequently stimulated algal growth, while higher concentrations of selenite inhibited algal growth. Selenite was more toxic to D. salina and D. bardawill than to S. platensis and P. tricornutum. All algae cultured in selenite were able to incorporate Se to different degrees, which depended on algal species. The distributions of selenite among intracellular macromolecular compounds were different among algal species : most of the selenite was associated with proteins in S. platensis, D. salina and D. bardawill, while most of the selenite was associated with lipids in P. tricornutum, which reflected the physiological differences among the algae. These observations suggest that algae are able to accumulate selenite and bind it with intracell~ar macromolecular compounds when exposed to high concentration of selenite. This may represent a form of storage or detoxification of selenite by the algae.     

三十烷醇对极大螺旋藻生物量及生化组成的影响

在Zarrouk液体培养基中加入1g/m3液体三十烷醇(LTA),极大螺旋藻(Spirulina maxima)的生物量增加了24.6%~25.7%,即使在碳源NaHCO₃减半(实验组2)的条件下生物量仍增加了4.43%~4.92%;碳水化合物含量增加了11.9%~16.0%,在实验组2条件下也增加5.7%~8.3%;叶绿素增加率为45.8%~63.3%;蛋白质总量基本不变,但水溶性蛋白的含量明显增加,从对照组的36%增长至实验组的60%左右,而水不溶性蛋白的含量则明显从30%左右减至10%左右.从螺旋藻生产基地的中试培养结果看,加入1g/m3液体三十烷醇,生物量提高了39.76%,比在实验室条件下获得更好的增产效果,但加入固体三十烷醇(STA)反而减少12%.以上结果表明,在极大螺旋藻培养基中添加液体三十烷醇可大幅度提高生物量和生化组成的含量.     

两种培养温度下钝顶螺旋藻吸收累积锗的研究

于１９９５年１￣３月将钝顶螺旋藻培养在５￣１５ｍｇ／Ｌ锗浓度的培养基内,研究两种培养温度下藻细胞,蛋白质、脂类和碳水化合物结合锗的量,探讨温度影响螺旋菏吸收累积锗的机理,结果表明,在两种培养温度下钝顶螺旋藻均可吸收累积一定量的猪（２２．４４－５２．１３μｇ／ｇ）并均匀地结合到蛋白质、脂类和碳水化合物中,藻细胞结合锗的理在代温下随外加是浓度增加而增加,在高温下与外加是浓度关系不明显;两种培养温度２下     

硒对两种盐藻生长的影响及其在细胞中的累积和分布

由于有机硒的重要医疗保健作用,利用生物合成方法生产有机硒引起了人们的兴趣.本文试图利用有重要食用和医疗价值的盐藻(Dnualiella salina、D.bardawil),通过在培养过程中添加Na₂SeO₃的方法,来富集和转化硒.