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A nutrient medium for development of cell dense inoculum in mixotrophic mode to seed mass culture units of Dunaliella salina 以混合营养方式将细胞密集接种体发育成盐杜氏藻种子群培养单位的营养培养基

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2015-03-01 DOI: 10.1127/ALGOL_STUD/2014/0177

Suman Keerthi, U. Koduru, N. Sarma

{"title":"A nutrient medium for development of cell dense inoculum in mixotrophic mode to seed mass culture units of Dunaliella salina","authors":"Suman Keerthi, U. Koduru, N. Sarma","doi":"10.1127/ALGOL_STUD/2014/0177","DOIUrl":"https://doi.org/10.1127/ALGOL_STUD/2014/0177","url":null,"abstract":"Dunaliella salina is cultivated extensively in natural ponds or intensively in race way ponds for β-carotene production. The ponds are seeded with culture inoculum developed in laboratory conditions or in pilot plant. Because of its high light requirement for growth, D. salina cultures are very cell dilute. Therefore, a large volume of culture inoculum is required to seed mass culture units. The feasibility of culture of D. salina in mixotrophic mode to obtain cell dense inoculum was investigated with an Indian isolate – I3. The constituents of the mineral medium and their concentration were first standardized in growth assays. The optimized mineral medium was supplemented with organic carbon sources – glycerol, sodium acetate and malt extract and organic nitrogen sources – yeast extract and peptone to test for the best results of mixotrophic culture. A mineral medium with 100 mg L–1 potassium nitrate or urea, 0.35 mg L–1 potassium phosphate, 1 ml L–1 trace elements mix (Walne's medium) without borate and 12.5 % NaCl in sea water was found optimal. Malt and yeast extracts in the proportion of 1:3 g L–1 in optimized mineral medium was found to result in cell dense cultures. Mixotrophically cultured inoculum grown photoautotrophically in optimized mineral medium resulted in increased biomass production with higher carotene content than when photoautotrophically cultured. The production cycle decreased by 11 days compared to autotrophic cultures","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"147 1","pages":"7-28"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/ALGOL_STUD/2014/0177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64048192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Cyanobacteria in biofilms on stone temples of Bhubaneswar, Eastern India 印度东部布巴内斯瓦尔石庙生物膜中的蓝藻

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2015-03-01 DOI: 10.1127/ALGOL_STUD/2015/0190

S. P. Adhikary, N. Keshari, C. Urzì, R. Philippis

{"title":"Cyanobacteria in biofilms on stone temples of Bhubaneswar, Eastern India","authors":"S. P. Adhikary, N. Keshari, C. Urzì, R. Philippis","doi":"10.1127/ALGOL_STUD/2015/0190","DOIUrl":"https://doi.org/10.1127/ALGOL_STUD/2015/0190","url":null,"abstract":"The exterior facades of several stone temples of Bhubaneswar (eastern India), built during the 6th to 13th centuries, are now covered with blackish-brown biofilms dominated by cyanobacteria. The architectural carvings show various degrees of deterioration of lithic faces underneath the biofilms, indicating the contribution of these phototrophic microorganisms to this process. A total of 17 species of cyanobacteria, belonging to the genera Gloeocapsa, Gloeocapsopsis, Porphyrosiphon, Leptolyngbya, Lyngbya, Phormidium, Nostoc, Scytonema, Tolypothrix, Hassallia and Stigonema were found in biofilms during the hot months of the tropical summers. The organisms were identified on the basis of their morphological features and those species that were isolated in pure culture were taxonomically validated by 16S rRNA gene sequencing. The temperature at the exterior of these stone monuments exceeds 60°C, especially during summer, coupled with extreme dryness. Consequently, only cyanobacteria are able to form biofilms. In contrast, during the rainy season, biofilms contained 25 additional cyanobacteria species belonging to the genera Cyanosarcina, Gloeocapsopsis, Phormidium, Pseudophormidium, Schizothrix, Lyngbya, Plectonema, Nostoc, Scytonema, Tolypothrix, Dichothrix and Calothrix together with the green alga Chlorella sphaerica.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"147 1","pages":"67-93"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/ALGOL_STUD/2015/0190","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64048900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Diversity of cyanobacterial flora of Bakreswar geothermal spring, West Bengal, India-II 印度西孟加拉邦Bakreswar地热温泉蓝藻菌群多样性研究ⅱ

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2015-03-01 DOI: 10.1127/1864-1318/2014/0178

Subhajit Roy, Shewli Bhattacharya, Manojit Debnath, S. Ray

{"title":"Diversity of cyanobacterial flora of Bakreswar geothermal spring, West Bengal, India-II","authors":"Subhajit Roy, Shewli Bhattacharya, Manojit Debnath, S. Ray","doi":"10.1127/1864-1318/2014/0178","DOIUrl":"https://doi.org/10.1127/1864-1318/2014/0178","url":null,"abstract":"Cyanobacteria in microbial mats are described from four sites of an alkaline thermal spring at Bakreswar located in the district Birbhum of West Bengal. Four types of mats are recognized based on their colour and on the predominance of different cyanobacterial species. The four types were dominated by: i) Synechococcus, ii) Leptolyngbya, iii) Oscillatoria and iv) Fischerella. Sixteen morphospecies belonging to fourteen genera of cyanobacteria from four orders were isolated. Thermosynechococcus, Thermophilic Synechococcus, 2 species of Phormidium, 2 species of Leptolyngbya, Gloeocapsa, Calothrix and Fischerella were isolated using BG-11 medium at a light intensity of 25–30 μmol photons m-2s-1 and a temperature of 37 ± 2°C. Most abundant were Thermosynechococcus elongatus, thermophilic Synechococcus lividus, Leptolyngbya fragilis and Leptolyngbya laminosa. Some of the isolated strains and mat samples were characterized by their pigment profile. Canonical correspondence analysis (CCA) showed that temperature was the main factor controlling species occurrence. L. laminosa dominated all four sites at temperatures of 38–60°C.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"147 1","pages":"29-44"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2014/0178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64046114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

In vitro antimicrobial activity of common species of seaweeds native to Trinidadian coasts 特立尼达海岸常见海藻的体外抗菌活性研究

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2015-03-01 DOI: 10.1127/ALGOL_STUD/2014/0184

A. Ramkissoon, A. Ramsubhag, A. Maxwell, J. Jayaraman

{"title":"In vitro antimicrobial activity of common species of seaweeds native to Trinidadian coasts","authors":"A. Ramkissoon, A. Ramsubhag, A. Maxwell, J. Jayaraman","doi":"10.1127/ALGOL_STUD/2014/0184","DOIUrl":"https://doi.org/10.1127/ALGOL_STUD/2014/0184","url":null,"abstract":"Marine macrophytes have been recently recognized as promising sources of bioactive molecules and as such many drugs leads have arisen from them. We investigated the antibacterial activity of methanol extracts of seaweeds against several human pathogens. Among the seaweeds screened, three species showed inhibitory effects against at least one pathogen, with Ulva fasciata and Amphiroa rigida exhibiting bacteriostatic activity and Chaetomorpha crassa showing bactericidal action against pathogenic Gram-positive cocci. Further testing revealed that the extracts of Chaetomorpha crassa displayed the ability to inhibit biofilm formation and virulence gene expression in Methicillin resistant Staphylococcus aureus (MRSA). Isolation and identification of the bioactive molecules of Chaetomorpha crassa revealed the two free fatty acids stearic acid and linolenic acid. This research shows that several species of marine plants found in Trinidad comprise bioactive compounds and may be good candidates for further investigations aimed at isolating and evaluating these compounds for potential medical applications.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"147 1","pages":"45-66"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/ALGOL_STUD/2014/0184","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64048701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

What does the difference between the female and male gametophytes of Saccharina japonica remind us of 日本糖精雌雄配子体的区别让我们想到了什么

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2014-10-01 DOI: 10.1127/1864-1318/2014/0145

Yan-hui Bi, Zhigang Zhou

{"title":"What does the difference between the female and male gametophytes of Saccharina japonica remind us of","authors":"Yan-hui Bi, Zhigang Zhou","doi":"10.1127/1864-1318/2014/0145","DOIUrl":"https://doi.org/10.1127/1864-1318/2014/0145","url":null,"abstract":"The diploid sporophytes of brown seaweed, Saccharina japonica (Aresch.) C.E. Lane, C. Mayes, Druehl et G.W. Saunders, produce spores after meiosis, which develop into haploid female and male gametophytes with a sex ratio of 1:1. This ratio, as well as the results that all gametophytes produced by zoospores generated by parthenogenetic sporophytes are females, suggest that an X/Y-like sex-determination system exists in S. japonica. To understand the molecular differences between female and male gametophytes, a suppression subtractive cDNA library was constructed. It was found that lhcf6 was one of the differentially expressed genes, and that this differential transcription between the kelp female gametophytes and male ones might result from different promoters. Although no sex-specific genes were screened, several sex-related molecular markers were developed. Based on the high quality chromosomes prepared by pretreatment with multi-enzymes, two molecular markers in relation to the female gametophytes were co-localized on the sporophyte chromosomes, indicating they are female chromosome-specific cytogenetic DNA markers. Whether S. japonica possesses a sex chromosome might be resolved by pairing the kelp sporophyte chromosomes with the help of localized repetitive sequences such as telomere and centromere using fluorescence in situ hybridization techniques.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"476 1","pages":"65-79"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2014/0145","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64044922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Screening of unicellular microalgae for biofuels and bioactive products and development of a pilot platform 筛选用于生物燃料和生物活性产品的单细胞微藻并开发一个试点平台

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2014-10-01 DOI: 10.1127/1864-1318/2014/0153

Jianguo Liu, Qianqian Li, L. Qian, Meilin He, Litao Zhang, Y. Liu, Yancong Ding, Zhen Zhang, Wei Lin, Pingping Song, Ling Li, Yuan Huang, Chunmei Han

引用次数: 10

Changes in cell density and chlorophyll fluorescence with salinity stress in two Isochrysis galbana strains (P rymnesiophyceae) 盐胁迫下两株galbana (P rhynesiophyceae)细胞密度和叶绿素荧光的变化

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2014-10-01 DOI: 10.1127/1864-1318/2014/0157

Ying Liang, Chunhui Cao, Chuanyuan Tian, Minghui Sun

引用次数: 6

Effects of temperature, salinity and light intensity on the growth, pigment and carrageenan of Betaphycus gelatinum 温度、盐度和光照对明胶Betaphycus gelatinum生长、色素和卡拉胶的影响

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2014-10-01 DOI: 10.1127/1864-1318/2014/0171

Jun Zhu, Zhe Fang, Min Liu, L. Liang, Hui-qin Huang, Xiaoxiao Zou, Xiang-zhi Lin, S. Bao

引用次数: 2

Effects of temperature on the early development of carpospores of Ahnfeltiopsis flabelliformis (Gigartinales, Rhodophyta) 温度对软绒拟南芥绒芽孢早期发育的影响

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2014-10-01 DOI: 10.1127/1864-1318/2014/0192

Fengjuan Zhao, Ziguo Zhao, Jidong Liu

引用次数: 0

Study on the sporeling rearing of Sargassum thunbergii 刺尾马尾的散种饲养研究

Algological studies (Stuttgart, Germany : 2007) Pub Date : 2014-10-01 DOI: 10.1127/1864-1318/2014/0149

Z. Liang, Xiu-tao Sun, Fei-jiu Wang, Wenjun Wang, Fuli Liu

引用次数: 1