植物生长素Q.C.对海带苗的影响     

吴瑞敏 《台湾海峡》1994,13(4):367-373

本文报道了植物生长素Ｑ．Ｃ．对海带苗的影响试验。结果表明，Ｑ．Ｃ．对海带苗的细胞分裂具有明显的促进作用，从而加速了海带配子体的生长发育。其中以０．２×１０＾－＾６（Ｖ／Ｖ）组的效果最明显，经处理３ｄ后配子体大小达１８－２０μｍ，１１ｄ后达２０－２３μｍ，并已进入了性成熟期，♀体一级突起达２２％，而对照组的大小为１６－１８μｍ，一级突起仅１％，用Ｑ．Ｃ．处理配子体阶段转化而成的幼孢子体或幼孢子体阶段  相似文献   

Physiology of Laminaria     

Nichola J.  Conolly Edward A.  Drew 《Marine Ecology》1985,6(3):181-195

Abstract. Dissolved nitrate, nitrite, ammonium and phosphate were monitored for 2.5 years along a coastal eutrophication gradient originating at the St. Andrews sewer outfall. Linear growth rates and tissue composition (phosphorus, various nitrogen fractions and storage carbohydrates) were monitored at the same stations in lamina tissue of Laminaria digitata and L. saccharina. Growth rates were considerably enhanced at the eutrophicated stations both in spring, when exogenous nutrients were at peak values at all stations, and during the summer when exogenous nutrients were very low at all stations. Enhanced summer growth rates were correlated with the increased reserves of N and P accumulated during winter and spring, and particularly with soluble organic nitrogen reserves. Accumulation of storage carbohydrates was inversely correlated with growth rate and tissue N and P reserves, presumably because fixed carbon could be incorporated into new protein and thence new tissue only if internal non-protein N reserves were available.  相似文献   

海带,裙带菜过氧化物酶活性及其同工酶酶谱的比较研究   总被引：2，自引：0，他引：2  

赵素达  高尚德 《海洋湖沼通报》1993,(3):53-59

本文研究、比较了海带(Laminaria japonica),裙带菜(Undaria pinnatifido(Harv.))的过氧化物酶活性,并对分析过氧化物酶同工酶的各种方法进行了比较。海带叶片内从基部到顶部过氧化物酶活性逐渐升高,固着器内酶活性高于叶片任何部位。裙带菜中,孢子叶、茎、叶片之间酶活性无相关性。三部分中,孢子叶过氧化物酶活性最高,茎中酶活性从基部到顶部逐渐升高,叶片中则逐渐下降。海带中过氧化物酶活性比裙带菜平均高出四至五倍。同工酶分析中,比较了三种提取酶液的方法,以真空抽滤方法最佳;比较了四种染色方法,以Vitc——联苯胺方法、醋酸联苯胺方法较理想;比较了不同的材料处理后同工酶分析结果,冰冻处理与新鲜的材料效果最好,用海水室内培养后效果较差。  相似文献   

孤雌生殖海带对草丁膦的敏感性   总被引：5，自引：1，他引：5  

吴韵  邹立红  姜鹏  孙国琼  秦松  曾呈奎 《海洋与湖沼》2001,32(1):19-22

于1999年4－7月，以孤雌生殖海带为材料，运用统计学方法研究其对草丁膦的敏感性，以期得到一定剂量和时间范围内草丁膦对不同长度孤雌生殖海带的半数致死剂量（LD50）。结果表明，孤雌海带在0．5－1．6cm长度范围内，草丁膦的半数致死剂量与海带的长度不相关，而与草丁膦的剂量和作用时间相关。孤雌生殖海带对草丁膦比对氯霉素和潮霉素更为敏感。提示，bar基因有可能成为海带基因工程更为理想的选择标记基因。  相似文献   

Structure Analysis of the Complete Mitochondrial Genome in Cultivation Variety 'Rongfu'     

ZHANG Jing  LI Ning  ZHANG Zhifeng  LIU Tao 《中国海洋大学学报(英文版)》2011,10(4)

In this report,complete mitochondrial genome sequences of Laminaria cultivation variety 'Rongfu' were obtained.The results showed the length of circular molecule of mtDNA was 37 638 bp(64.7% A+T),encoding three rRNAs(23S,16S and 5S),25 tRNAs,35 known mitochondrial proteins and 3 ORFs.Sequence alignment indicated its mtDNA genome was very similar to that of Laminaria japonica.Phylogenetic trees inferred from concatenated 30 mitochondrial genes showed that 'Rongfu',Laminaria japon-ica,Laminaria longipedalis,L...  相似文献   

Immunosuppressive activities of fucoidan from Laminaria japonica     

Zhang Quanbin  Li Zhien  Zhou Gefei  Niu Xizhen  Zhang Hong 《中国海洋湖沼学报》2003,21(4):324-328

Effects of fucoidan fromLaminaria japonica on 2,4-dinitrochlorobenzene induced delayed-type hypersensitivity (DTH) reaction and the serum levels of IgG, IgM, complement C3 and C4 were investigated in the present study. Results showed that oral administration of fucoidan at dose of 150 and 300 mg/(kg· d) for 9 days before the hapten challenge significantly inhibited 2,4-dinitrochlorobenzene induced delayed-type hypersensitivity reaction; and also inhibited the humoral immunity. Serum C3 and C4 levels were markedly reduced by fucoidan at dose of 150 and 300 mg/kg; and serum IgG and IgM levels were reduced by fucoidan at dose of 300mg/kg. The inhibitory effects of fucoidan on delayed-type hypersensitivity suggested that it may be potential medication for chronic inflammatory diseases in the future. This study was supported by National Foundation for New Drug Research & Development (NFND) No.144.  相似文献   

Phylogeny of Saccharina and Laminaria (Laminariaceae,Laminariales, Phaeophyta) in sequence-tagged-site markers     

曲洁琼  张静  王绪敏  池姗  刘翠  刘涛 《中国海洋湖沼学报》2014,32(1):22-33

  相似文献   

Isolation and characterization of fucoidans from five brown algae and evaluation of their antioxidant activity     

Guiyan Qu  Xu Liu  Dongfeng Wang  Yi Yuan  Lijun Han 《中国海洋大学学报(英文版)》2014,13(5):851-856

In this study, we evaluated the chemical property and antioxidant activity of fucoidans isolated from brown algae, Laminaria japonica(LJF), Lessonia nigrescens(LNF), Lessonia trabeculata(LTF), Ascophyllum mackaii(AMF), and Ecklonia maxima(EMF). LJF was less in sulfate content(14.16%) and more in galactose and mannose content(1.08 and 0.68) than the documented early. EMF contained 20%–30% of sulfate and fucose, 0.97 in molar ratio which was lower than that of sulfate to other four fucoidans(1.21–1.41). AMF(162 kDa) and EMF(150 kDa) were the first two largest in molecular weight, which were followed by LJP(126 kDa), LNF(113 kDa) and LTF(105 kDa). The fucoidans isolated these algae showed a wide range of antioxidant activity in vitro. It was found that the reducing power of the isolated fucoidans was positively correlated with their sulfate content and molecular weight. In addition, LNF and LTF at low concentrations exhibited high superoxide and hydroxyl radical scavenging activity. This demonstrated that low molecular weight fucoidans may perform a high antioxidant activity.  相似文献   

Expressed sequence tag analysis and cloning of trehalose-6-phosphate synthase gene from marine alga Laminaria japonica (Phaeophyta)     

XUAN Jinsong  FENG Yanbin  WENG Manli  ZHAO Ge  SHI Jinfeng  YAO Jianting  WANG Xiuliang  GUO Baotai  QIAO Lixian  DUAN Delin  WANG Bin 《海洋学报(英文版)》2012,31(6):139-148

A high quality cDNA library was constructed from the brown alga Laminaria japonica,with the titer of 1.2×10 5 pfu/ml.The average insert size of the cDNA library is about 1.6 kb.From the cDNA library,591 cDNA clones were randomly selected and sequenced.As a result,574 EST(expressed sequence tag) sequences were generated.All of the 574 ESTs were submitted to the dbEST database section of GenBank with the accession numbers from CX942625 to CX943198.The cDNA library was screened with a α-32 p labeled 453 bp T P S gene probe,which is a partial sequence yielded from Porphyra yezoensis.Four positive cDNA clones were screened and the sequencing data showed that these four cDNA clones covered majority of L.japonica TPS cDNA sequence.After PCR amplification,sequencing and assembling,the entire ORF(open reading frame) sequence of the T P S gene was obtained,which was named LjTPS.LjTPS encodes a protein containing 908 amino acids with a calculated molecular mass of 101 674 Daltons.The LjTPS gene was successfully expressed in E.coli and rice.The LjTPS gene has potential application both in plant breeding to stress tolerance and in deciphering the T P S gene function and mechanism to stress tolerance.  相似文献   

海带微卫星引物对裙带菜群体分析适用性的初步研究     

徐静娟  赵翠  刘涛  刘岩  宫庆礼 《中国海洋大学学报(自然科学版)》2012,(10):41-46

为获得用于裙带菜种质结构和遗传多样性研究的微卫星标记,采用近缘物种转移法分析了15个海带微卫星引物在裙带菜中的应用情况。对38个裙带菜个体进行多样性分析,结果显示:标记SSR002和SSR115不能扩增裙带菜基因组,位点SSR194能扩增,但不具有多态性,其他12个标记均能扩增裙带菜DNA,且都具有检出多态性,其中9个符合哈迪-温伯格平衡。这9个海带微卫星标记检出的等位基因数为34个,从3～5个不等,平均每个位点扩增得到3.8个等位基因。观测杂合度(Ho)、期望杂合度(He)及多态性信息含量值(PIC)的范围分别为0.238～1.000、0.500～0.692、0.413～0.780,9个位点提供的多态性较高,适用于裙带菜遗传学研究。  相似文献