Pub Date : 2014-04-01DOI: 10.1127/1864-1318/2014/0173
M. Khadka, J. Dahmen, M. Salem, Jeffrey D. Leblond
{"title":"Comparative study of galactolipid composition and biosynthetic genes for galactolipid synthases in Vitrella brassicaformis and Chromera velia, two recently identified chromerids with red algal-derived plastids","authors":"M. Khadka, J. Dahmen, M. Salem, Jeffrey D. Leblond","doi":"10.1127/1864-1318/2014/0173","DOIUrl":"https://doi.org/10.1127/1864-1318/2014/0173","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"144 1","pages":"73-93"},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2014/0173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64046061","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}
Pub Date : 2014-04-01DOI: 10.1127/1864-1318/2014/0179
Andreas Holzinger, Andrea Dablander, Georg Gärtner
Cell division and reproduction of a cultivated strain of Macrochloris radiosa (Stephanosphaerinia clade) were studied by light- and transmission electron microscopy. Multinucleate cells were frequently observed allowing description of the cell structure and details of the reproduction process. Nuclear staining revealed the position of the multiple polymorphic nuclei between the chloroplast lobes. Ultrastructure of coenocytic cells showed no signs of cleavage of the protoplast in the cytoplasm, although basal bodies were already present within the multinucleate cells. In the further course of the reproduction, biflagellate zoospores were developed that retained their flagella during sporulation. Zoospores were subsequently released from the sporangia.
{"title":"Investigations of cell morphology and reproduction in <i>Macrochloris radiosa</i> Ettl & Gärtner (Stephano-sphaerinia, Chlorophyta) by light- and WUDQVPLVVLRQ electron microscopy.","authors":"Andreas Holzinger, Andrea Dablander, Georg Gärtner","doi":"10.1127/1864-1318/2014/0179","DOIUrl":"https://doi.org/10.1127/1864-1318/2014/0179","url":null,"abstract":"<p><p>Cell division and reproduction of a cultivated strain of <i>Macrochloris radiosa</i> (Stephanosphaerinia clade) were studied by light- and transmission electron microscopy. Multinucleate cells were frequently observed allowing description of the cell structure and details of the reproduction process. Nuclear staining revealed the position of the multiple polymorphic nuclei between the chloroplast lobes. Ultrastructure of coenocytic cells showed no signs of cleavage of the protoplast in the cytoplasm, although basal bodies were already present within the multinucleate cells. In the further course of the reproduction, biflagellate zoospores were developed that retained their flagella during sporulation. Zoospores were subsequently released from the sporangia.</p>","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"144 ","pages":"95-104"},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2014/0179","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33037998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-12-01DOI: 10.1127/1864-1318/2013/0174
E. Mitrofanova, S. Genkal
{"title":"A noteworthy finding of the rare species Nupela neogracillima (Bacillariophyceae) in Lake Teletskoye (Russian Altai)","authors":"E. Mitrofanova, S. Genkal","doi":"10.1127/1864-1318/2013/0174","DOIUrl":"https://doi.org/10.1127/1864-1318/2013/0174","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"143 1","pages":"43-49"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2013/0174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64044908","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}
Pub Date : 2013-12-01DOI: 10.1127/1864-1318/2013/0143
G. Mukherjee, B. Nayak, D. Das
{"title":"Cyanobacteria as a valuable source of antiviral, antibacterial and antifungal compounds -an overview","authors":"G. Mukherjee, B. Nayak, D. Das","doi":"10.1127/1864-1318/2013/0143","DOIUrl":"https://doi.org/10.1127/1864-1318/2013/0143","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"143 1","pages":"3-25"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2013/0143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64044842","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}
Pub Date : 2013-12-01DOI: 10.1127/1864-1318/2013/0069
M. I. Abdel-Hamid, Dina A. El-Refaay, M. Abdel-Mogib, Y. Azab
{"title":"Studies on biomass and lipid production of seven diatom species with special emphasis on lipid composition of Nitzschia palea (Bacillariophyceae) as reliable biodiesel feedstock","authors":"M. I. Abdel-Hamid, Dina A. El-Refaay, M. Abdel-Mogib, Y. Azab","doi":"10.1127/1864-1318/2013/0069","DOIUrl":"https://doi.org/10.1127/1864-1318/2013/0069","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"143 1","pages":"65-87"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2013/0069","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64043580","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}
Pub Date : 2013-12-01DOI: 10.1127/1864-1318/2013/0137
A. Pentecost, B. Whitton, Christopher F. Carter
The ecology of Chroothece at six sites in the UK and one in the Isle of Man is de- scribed, together with morphological observations. Sites were near vertical or steep, wetted by trickles and drips, but subject to marked changes in extent of wetting and with parts of the gen- eral area liable to desiccation. Water chemical data are given for four sites, where the alga oc- curred in base-rich, low nutrient waters and with fi lterable organic phosphorus the principal fraction of total fi lterable orthophosphate. Chroothece was associated with a range of cyanobac- teria, especially species of Schizothrix, but also colonial, heterocystous and presumed nitrogen- fi xing genera, and calcicolous diatoms (e.g. Epithemia and Mastogloia). Morphological meas- urements suggest the Chroothece populations all fi t C. richteriana.
{"title":"Ecology and morphology of the freshwater red alga Chroothece in the British Isles","authors":"A. Pentecost, B. Whitton, Christopher F. Carter","doi":"10.1127/1864-1318/2013/0137","DOIUrl":"https://doi.org/10.1127/1864-1318/2013/0137","url":null,"abstract":"The ecology of Chroothece at six sites in the UK and one in the Isle of Man is de- scribed, together with morphological observations. Sites were near vertical or steep, wetted by trickles and drips, but subject to marked changes in extent of wetting and with parts of the gen- eral area liable to desiccation. Water chemical data are given for four sites, where the alga oc- curred in base-rich, low nutrient waters and with fi lterable organic phosphorus the principal fraction of total fi lterable orthophosphate. Chroothece was associated with a range of cyanobac- teria, especially species of Schizothrix, but also colonial, heterocystous and presumed nitrogen- fi xing genera, and calcicolous diatoms (e.g. Epithemia and Mastogloia). Morphological meas- urements suggest the Chroothece populations all fi t C. richteriana.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"143 1","pages":"51-63"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2013/0137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64044772","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}
Pub Date : 2013-05-01DOI: 10.1127/1864-1318/2013/0104
Natalia Bongiovani, C. Popovich, A. Martínez, Hugo Freije, D. Constenla, P. Leonardi, B. Blanca
The development of effi cient, rapid and species-specifi c techniques is indispensable for assessing growth and neutral lipid yield in microalga cultures for biodiesel oil production. Nannochloropsis oculata is a small microalgae with a thick cell wall. In vivo techniques to es- timate cell density, chlorophyll a and neutral lipids are reported. A calibration curve of cell density versus optical density was obtained and validated at 540 nm, under different growth phases. Intracellular neutral lipid storage was evaluated with fl uorometry and epifl uorescent microscopy employing fl uorochrome Nile Red. The addition of 5 % dimethyl sulfoxide en- hanced 12.5 times the fl uorescence signal effi ciency. In situ fl uorescence measurements al- lowed estimating the neutral lipid content (NR-FI). Besides, no signifi cant differences were found in the lipid neutral content between gravimetric and triolein methods. The relationship between NR-FI and chlorophyll fl uorescence signals was used as a neutral lipid accumulation index, which is useful in order to establish the optimum harvesting time. Thus, these procedures may be applied for a better monitoring mode of growth and neutral lipid accumulation in N. oculata's cultures at commercial scale.
{"title":"In vivo measurements to estimate culture status and neutral lipid accumulation in Nannochloropsis oculata CCALA 978: implications for biodiesel oil studies","authors":"Natalia Bongiovani, C. Popovich, A. Martínez, Hugo Freije, D. Constenla, P. Leonardi, B. Blanca","doi":"10.1127/1864-1318/2013/0104","DOIUrl":"https://doi.org/10.1127/1864-1318/2013/0104","url":null,"abstract":"The development of effi cient, rapid and species-specifi c techniques is indispensable for assessing growth and neutral lipid yield in microalga cultures for biodiesel oil production. Nannochloropsis oculata is a small microalgae with a thick cell wall. In vivo techniques to es- timate cell density, chlorophyll a and neutral lipids are reported. A calibration curve of cell density versus optical density was obtained and validated at 540 nm, under different growth phases. Intracellular neutral lipid storage was evaluated with fl uorometry and epifl uorescent microscopy employing fl uorochrome Nile Red. The addition of 5 % dimethyl sulfoxide en- hanced 12.5 times the fl uorescence signal effi ciency. In situ fl uorescence measurements al- lowed estimating the neutral lipid content (NR-FI). Besides, no signifi cant differences were found in the lipid neutral content between gravimetric and triolein methods. The relationship between NR-FI and chlorophyll fl uorescence signals was used as a neutral lipid accumulation index, which is useful in order to establish the optimum harvesting time. Thus, these procedures may be applied for a better monitoring mode of growth and neutral lipid accumulation in N. oculata's cultures at commercial scale.","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"142 1","pages":"3-16"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2013/0104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64043849","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}
Pub Date : 2013-05-01DOI: 10.1127/1864-1318/2013/0130
Jeffrey D. Leblond, A. Dahmen, V. Dodson, J. Dahmen
{"title":"Characterization of the Betaine Lipids, Diacylglyceryl-N,N,N-trimethylhomoserine (DGTS) and Diaclyglycerylhydroxymethyl-N,N,N-trimethyl-β-alanine (DGTA), in Brown- and Green-Pigmented Raphidophytes","authors":"Jeffrey D. Leblond, A. Dahmen, V. Dodson, J. Dahmen","doi":"10.1127/1864-1318/2013/0130","DOIUrl":"https://doi.org/10.1127/1864-1318/2013/0130","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"142 1","pages":"17-27"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2013/0130","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64044274","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}
Pub Date : 2013-05-01DOI: 10.1127/1864-1318/2013/0131
K. Schwartzenberg, Stephanie Bornfleth, A. Lindner, D. Hanelt
{"title":"The Microalgae and Zygnematophyceae Collection Hamburg (MZCH) – living cultures for research on rare streptophytic algae","authors":"K. Schwartzenberg, Stephanie Bornfleth, A. Lindner, D. Hanelt","doi":"10.1127/1864-1318/2013/0131","DOIUrl":"https://doi.org/10.1127/1864-1318/2013/0131","url":null,"abstract":"","PeriodicalId":90782,"journal":{"name":"Algological studies (Stuttgart, Germany : 2007)","volume":"142 1","pages":"77-107"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1127/1864-1318/2013/0131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64044358","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}
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