High salinity alters chloroplast morpho‐physiology in a freshwater <i>Kirchneriella</i> species (Selenastraceae) from Ethiopian Lake Awasa

Ferroni, Lorenzo; Baldisserotto, Costanza; Pantaleoni, Laura; Billi, Paolo; Pancaldi, Simonetta

doi:10.3732/ajb.94.12.1972

Cited by 31 publications

(8 citation statements)

References 61 publications

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“…Hence, it is not surprising that the recruitment of a universal bioassay strain is sourced in this widely and ubiquitous growing group of the Selenastraceae (Skulberg 1964). Ferroni et al (2007) conducted an experiment with a crescent-shaped strain (''Kirchneriella sp.'' AW15) isolated from the freshwater Lake Awasa in the Rift Valley of Ethiopia.…”

Section: Resultsmentioning

confidence: 99%

SSU rRNA GENE PHYLOGENY OF MORPHOSPECIES AFFILIATED TO THE BIOASSAY ALGA “SELENASTRUM CAPRICORNUTUM” RECOVERED THE POLYPHYLETIC ORIGIN OF CRESCENT-SHAPED CHLOROPHYTA1

Krienitz

Böck

Nozaki

et al. 2011

Journal of Phycology

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The generic concept of coccoid green algae exhibiting a crescent-shaped morphotype is evaluated using SSU rRNA gene sequence analyses and light and electron microscopical observations. These common chlorophytes evolved polyphyletically in 10 different clades of the Chlorophyceae and three clades of the Trebouxiophyceae. Six clades are assigned to known genera of Selenastraceae: Kirchneriella, Nephrochlamys, Raphidocelis, Rhombocystis, Selenastrum, and Tetranephris. Four other clades, named following their present genus designation as Ankistrodesmus-like I and II and Monoraphidium-like I and II, require further investigation. One crescent-shaped morphotype, which evolved within the Trebouxiophyceae, is designated as Neocystis mucosa sp. nov. The other two lineages containing trebouxiophycean algae with this morphotype are the Elliptochloris and the Watanabea clades. The taxonomic placement of the widely used bioassay strain "Selenastrum capricornutum" NIVA-CHL 1 in the genus Raphidocelis (species name Raphidocelis subcapitata) is indicated by molecular data.

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Section: Resultsmentioning

confidence: 99%

SSU rRNA GENE PHYLOGENY OF MORPHOSPECIES AFFILIATED TO THE BIOASSAY ALGA “SELENASTRUM CAPRICORNUTUM” RECOVERED THE POLYPHYLETIC ORIGIN OF CRESCENT-SHAPED CHLOROPHYTA1

Krienitz

Böck

Nozaki

et al. 2011

Journal of Phycology

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“…Figure 8 gives examples of two such applications. Room temperature fluorescence spectra have also been used to evaluate the response of photosynthetic organisms (microalgae and in higher plants) to some environmental stresses (Romanowska-Duda et al 2005 , 2010 ; Ferroni et al 2007 ; Baldisserotto et al 2010 , 2012 ; Burling et al 2011 ; Hunsche et al 2011 ). Finally, such spectra have been used as well to characterize developmental aspects of the photosynthetic membrane (Pancaldi et al 2002 ; Baldisserotto et al 2005 ; Ferroni et al 2009 , 2013 ) and, as discussed in Question 25, to estimate leaf chlorophyll content.…”

Section: Question 23 What Is the Difference Between Fluorescence Emimentioning

confidence: 99%

Frequently asked questions about in vivo chlorophyll fluorescence: practical issues

Schansker²,

et al. 2014

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The aim of this educational review is to provide practical information on the hardware, methodology, and the hands on application of chlorophyll (Chl) a fluorescence technology. We present the paper in a question and answer format like frequently asked questions. Although nearly all information on the application of Chl a fluorescence can be found in the literature, it is not always easily accessible. This paper is primarily aimed at scientists who have some experience with the application of Chl a fluorescence but are still in the process of discovering what it all means and how it can be used. Topics discussed are (among other things) the kind of information that can be obtained using different fluorescence techniques, the interpretation of Chl a fluorescence signals, specific applications of these techniques, and practical advice on different subjects, such as on the length of dark adaptation before measurement of the Chl a fluorescence transient. The paper also provides the physiological background for some of the applied procedures. It also serves as a source of reference for experienced scientists.

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“…The equation was used with data recorded in the exponential phase of growth (Ferroni et al 2007). Algal biomass production was also monitored by measuring the dry weight increment: 5 mL of each culture were collected by centrifugation at 4,900×g for 20 min and dried at 70°C for 24 h before being weighed.…”

Section: Culture Conditions and Nitrogen Analysismentioning

confidence: 99%

Isolation and characterization of a Scenedesmus acutus strain to be used for bioremediation of urban wastewater

et al. 2011

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Green microalgae, due to their short growth cycle and to their ability to photosynthetically fix carbon dioxide producing an oil-rich biomass, have been proposed as an attractive alternative feedstock for the production of "second generation" biofuels. However, it has been anticipated that owing to their ability to colonize very different environments characterized by high levels of nitrogen, they can also be good candidates for bioremediation, thus integrating environmental protection with sustainable biomass production. We have isolated a strain belonging to Scenedesmus genus from urban wastewater. This isolate, Scenedesmus acutus PVUW12, was tested for its ability to grow and actively deplete eutrophicating inorganic molecules present in wastewater. In order to test its biomass productivity, the PVUW12 strain was grown in a verticalcolumn photobioreactor using standard growth medium obtaining a maximal productivity of 0.3 g dry weight L −1 d. When the same strain was grown in the photobioreactor filled with wastewater collected from the final step of the local urban purifier plant containing 18.8 mg L −1 nitrate, we observed complete nitrogen removal coupled with a biomass production of about 0.74 g dry weight L −1 within 3 days. After 10 days, the recovered biomass was analyzed for triglyceride content which was found to be 9.3% of the dry biomass. However, when algal cells were left for additional 10 days in static conditions the triglyceride content increased to 28.8%. These data show that this Scenedesmus strain can be used for wastewater bioremediation producing a biomass suitable for energy production.

show abstract

High salinity alters chloroplast morpho‐physiology in a freshwater Kirchneriella species (Selenastraceae) from Ethiopian Lake Awasa

Cited by 31 publications

References 61 publications

SSU rRNA GENE PHYLOGENY OF MORPHOSPECIES AFFILIATED TO THE BIOASSAY ALGA “SELENASTRUM CAPRICORNUTUM” RECOVERED THE POLYPHYLETIC ORIGIN OF CRESCENT-SHAPED CHLOROPHYTA1

SSU rRNA GENE PHYLOGENY OF MORPHOSPECIES AFFILIATED TO THE BIOASSAY ALGA “SELENASTRUM CAPRICORNUTUM” RECOVERED THE POLYPHYLETIC ORIGIN OF CRESCENT-SHAPED CHLOROPHYTA1

Frequently asked questions about in vivo chlorophyll fluorescence: practical issues

Isolation and characterization of a Scenedesmus acutus strain to be used for bioremediation of urban wastewater

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