A new aerial alga, Stichococcus ampulliformis sp. nov. (Trebouxiophyceae, Chlorophyta) from Japan

Handa, Shinji; Nakahara, Miho; Tsubota, Hiromi; Deguchi, Hiroyuki; Nakano, Tomoyasu

doi:10.1111/j.1440-1835.2003.tb00188.x

Cited by 18 publications

(26 citation statements)

References 21 publications

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“…1). Consistent with the previous studies (Handa et al 2003;Neustupa et al 2007), different isolates attributed to S. bacillaris do not branch together in the phylogenetic tree, which shows a great difference in the 18S rDNA sequences of this species.…”

Section: Resultssupporting

confidence: 90%

“…Stichococcus Nägeli, a genus of green algae, which includes about 14 species, dwells mostly in moist soil, on the wall, the trunk and aquatic plants (Ettl and Gärtner 1995;Handa et al 2003;Neustupa et al 2007). Stichococcus bacillaris, the model species of this genus, distributes all over the world including Antarctica, showing an extensive adaptability to changing temperatures, salinities and pH values with short life cycles (Pollio et al 1997).…”

Section: Introductionmentioning

confidence: 99%

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Temperature responses of growth, photosynthesis, fatty acid and nitrate reductase in Antarctic and temperate Stichococcus

Chen

2011

Extremophiles

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Stichococcus, a genus of green algae, distributes in ice-free areas throughout Antarctica. To understand adaptive strategies of Stichococcus to permanently cold environments, the physiological responses to temperature of two psychrotolerants, S. bacillaris NJ-10 and S. minutus NJ-17, isolated from rock surfaces in Antarctica were compared with that of one temperate S. bacillaris FACHB753. Two Antarctic Stichococcus strains grew at temperature from 4 to 25°C, while the temperate strain could grow above 30°C but could not survive at 4°C. The photosynthetic activity of FACHB753 at lower than 10°C was less than that of Antarctic algae. Nitrate reductase in NJ-10 and NJ-17 had its optimal temperature at 20°C, in comparison, the maximal activity of nitrate reductase in FACHB753 was found at 25°C. When cultured at 4-15°C a large portion of unsaturated fatty acids in the two Antarctic species was detected and the regulation of the degree of unsaturation of fatty acids by temperature was observed only above 15°C, though the content of the major unsaturated fatty acid aC18:3 in FACHB753 decreased with the temperatures elevated from 10 to 25°C. Elevated nitrate reductase activity and photosynthetic rates at low temperatures together with the high proportion of unsaturated fatty acids contribute to the ability of the Antarctic Stichococcus to thrive.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Temperature responses of growth, photosynthesis, fatty acid and nitrate reductase in Antarctic and temperate Stichococcus

Chen

2011

Extremophiles

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“…Nevertheless, both species are morphologically very similar, even if their phenotypic differentiation remains to be investigated in a comparative morphological study. However, even the available morphological data on these species (haNda et al 2003, NEustupa & šEjNohová 2003; this study) indicate slight, yet discernible, differences. Especially, we have not observed in M. aerophytica cultures formation of moniliform filamentous branches reported for S. ampulliformis (haNda et al 2003).…”

Section: Discussioncontrasting

confidence: 54%

“…When the sequence (excluding the intron regions) was used as a query in BLASTN searches against the nr database at NCBI (http:// blast.ncbi.nlm.nih.gov/), it gave as best hits sequences previously shown to belong to a common clade comprising genera Stichococcus, Raphidonema, Prasiola and relatives in the green algal class Trebouxiophyceae (haNda et al 2003, kaRstEN et al 2005, NEustupa et al 2007, mikhailyuk et al 2008. The level of similarity of these sequences to the query was up to 97% identity in pairwise alignments, indicating that M. aerophytica is probably related to this clade.…”

Section: Resultsmentioning

confidence: 99%

“…A phylogenetic analysis based on a partial 18S rRNA gene sequence indicated that S. ampulliformis is indeed related to Stichococcus species within the class Trebouxiophyceae, but the Stichococcus genus appeared paraphyletic owing to sequences from Prasiola spp. disrupting its monophyly (haNda et al 2003). Regardless the uncertainties about the precise relationship of S. ampulliformis to other Stichococcus species, it is clear that S. ampulliformis is not closely related to the genus Marvania.…”

Section: Introductionmentioning

confidence: 99%

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