Produktion und Charakterisierung von mikrostrukturierten Calcitpartikeln aus der Kalkalge <i>Emiliania huxleyi</i>

Hariskos, Ioanna; Chairopoulou, Makrina A.; Vučak, Marijan; Posten, Clemens; Teipel, Ulrich

doi:10.1002/cite.201500128

Cited by 3 publications

(2 citation statements)

References 94 publications

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“…Furthermore, it has been reported that coccoliths from cultivation are often malformed or partially destroyed, which may be caused by turbulence or potential toxic influence of the cultivation vessel . However, just recently the development of a functioning process, which delivers more than 5 g/L of coccoliths, was finally achieved . Although adequate quantity is the first requirement to perform material‐intensive measurements, more prerequisites have to be fulfilled in advance.…”

Section: Introductionmentioning

confidence: 99%

Biogenic calcite particles from microalgae—Coccoliths as a potential raw material

Jakob

Chairopoulou

Vučak³

et al. 2017

Engineering in Life Sciences

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Synthetic calcite (CaCO3) particles are found in a broad range of applications. The geometry of particles produced from limestone or precipitation are versatile but limited to basic shapes. The microalga Emiliania huxleyi produces micro‐structured calcite platelets, called coccoliths. This article presents the results of an application‐orientated study, which includes characteristic values also used in the calcite industry for particle evaluation. It is demonstrated that coccoliths are significantly different from all industrial particles produced so far. Coccoliths are porous particles, mainly consisted of calcium carbonate, with further elements such as Mg, Si, Sr, and Fe often embedded in their structure. Their structure is extremely sophisticated, while the overall particle morphology and particle size distribution are homogeneous. This study gives a first inside into the potential of these exceptional objects and may set further impulses for their utilization in specific calcite particle applications.

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Section: Introductionmentioning

confidence: 99%

Biogenic calcite particles from microalgae—Coccoliths as a potential raw material

Jakob

Chairopoulou

Vučak³

et al. 2017

Engineering in Life Sciences

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“…Consequently, microalgal responses to macronutrient starvation have often been investigated regarding the ecophysiology of these microbes. However, stagnating growth due to nutrient starvation does not necessarily shut down calcification and thus often leads to a relative overproduction of coccoliths (Paasche 1998;Dyhrman et al 2006), which is an interesting fact to biotechnologists that aim to exploit this biological function (Hariskos et al 2016).…”

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confidence: 99%

Phosphorus and nitrogen starvation reveal life‐cycle specific responses in the metabolome of Emiliania huxleyi (Haptophyta)

Wördenweber

Rokitta

Heidenreich

et al. 2017

Limnology & Oceanography

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The coccolithophore Emiliania huxleyi is a microalga with biogeochemical and biotechnological relevance, due to its high abundance in the ocean and its ability to form intricate calcium carbonate structures. Depletion of macronutrients in oceanic waters is very common and will likely enhance with advancing climate change. We present the first comprehensive metabolome study analyzing the effect of phosphorus (P) and nitrogen (N) starvation on the diploid and haploid life‐cycle stage, applying various metabolome analysis methods to gain new insights in intracellular mechanisms to cope with nutrient starvation. P‐starvation led to an accumulation of many generic and especially N‐rich metabolites, including lipids, osmolytes, and pigments. This suggests that P‐starvation primarily arrests cell‐cycling due to lacking P for nucleic acid synthesis, but that enzymatic functionality is widely preserved. Also, the de‐epoxidation ratio of the xanthophyll cycle was upregulated in the diploid stage under P‐starvation, indicating increased nonphotochemical quenching, a response typically observed under high light stress. In contrast, N‐starvation resulted in a decrease of most central metabolites, also P‐containing ones, especially in the diploid stage, indicating that most enzymatic functionality ceased. The two investigated nutrient starvation conditions caused significantly different responses, contrary to previous assumptions derived from transcriptomic studies. Data highlight that instantaneous biochemical flux is a more dominant driver of the metabolome than the transcriptomically rearranged pathway patterns. Due to the fundamental nature of the observed responses it may be speculated that microalgae with similar nutrient requirements can cope better with P‐starvation than with N‐starvation.

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Investigation of Cell Growth and Chlorophyll a Content of the Coccolithophorid Alga Emiliania huxleyi by Using Simple Bench-Top Flow Cytometry

Hariskos

Rubner²,

Posten³

2015

J Bioprocess Biotech

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Produktion und Charakterisierung von mikrostrukturierten Calcitpartikeln aus der Kalkalge Emiliania huxleyi

Cited by 3 publications

References 94 publications

Biogenic calcite particles from microalgae—Coccoliths as a potential raw material

Biogenic calcite particles from microalgae—Coccoliths as a potential raw material

Phosphorus and nitrogen starvation reveal life‐cycle specific responses in the metabolome of Emiliania huxleyi (Haptophyta)

Investigation of Cell Growth and Chlorophyll a Content of the Coccolithophorid Alga Emiliania huxleyi by Using Simple Bench-Top Flow Cytometry

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