Intraspecific trait variation affecting astaxanthin productivity in two Haematococcus (Chlorophyceae) species

Allewaert, Céline C.; Vanormelingen, Pieter; Daveloose, Ilse; Verstraete, Tine; Vyverman, Wim

doi:10.1016/j.algal.2016.10.021

Cited by 13 publications

(6 citation statements)

References 56 publications

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“…Again, H. rubicundus (SAG 34-1c) showed the highest average growth rate of all strains in our analysis. This result appears to be consistent with observations by Allewaert et al (2017) where more strains of H. rubicundus than H. lacustris showed relatively high growth rates. Researchers focused on optimizing astaxanthin production for commercialization generally must first enhance growth of Haematococcus and then, alter conditions that favor carotenogenesis (e.g., Rizzo et al 2022).…”

Section: Molecular Phylogenysupporting

confidence: 93%

“…The data we presented here is based on a much smaller set of strains and our induction protocol (starting with exponential stage motile cells rather than stationary stage palmella; high light and reduced phosphate rather than just reduced phosphate) and analysis protocol (HPLC rather than spectrophotometry) differed from that of Allewaert et al (2017). Allewaert et al (2017) noted that astaxanthin production could be relatively high in H. rubicundus (e.g., CZD1_08), but higher rates for astaxanthin productivity were reported in strains of H. lacustris (e.g., BE02_09). The remaining strains in our analysis did not show unambiguous differences in total carotenoid and astaxanthin yields (Fig.…”

Section: Molecular Phylogenymentioning

confidence: 99%

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The description of Haematococcus privus sp. nov. (Chlorophyceae, Chlamydomonadales) from North America

Buchheim¹,

Silver²,

Johnson³

et al. 2023

Algae

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An enormous body of research is focused on finding ways to commercialize carotenoids produced by the unicellular green alga, Haematococcus, often without the benefit of a sound phylogenetic assessment. Evidence of cryptic diversity in the genus means that comparing results of pigment studies may be confounded by the absence of a phylogenetic framework. Moreover, previous work has identified unnamed strains that are likely candidates for species status. We reconstructed the phylogeny of an expanded sampling of Haematococcus isolates utilizing data from nuclear ribosomal markers (18S rRNA gene, 26S rRNA gene, internal transcribed spacer [ITS]-1, 5.8S rRNA gene, and ITS-2) and the rbcL gene. In addition, we gathered morphological, ultrastructural and pigment data from key isolates of Haematococcus. Our expanded data and taxon sampling support the concept of a new species, H. privus, found exclusively in North America. Despite overlap in numerous morphological traits, results indicate that ratios of protoplast length to width and akinete diameter may be useful for discriminating Haematococcus lineages. High growth rate and robust astaxanthin yield indicate that H. rubicundus (SAG 34-1c) is worthy of additional scrutiny as a pigment source. With the description of H. privus, the evidence supports the existence of at least five, species-level lineages in the genus. Our phylogenetic assessment provides the tools to frame future pigment investigations of Haematococcus in an updated evolutionary context. In addition, our investigation highlighted open questions regarding polyploidy and sexuality in Haematococcus which demonstrate that much remains to be discovered about this green flagellate.

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Section: Molecular Phylogenysupporting

confidence: 93%

Section: Molecular Phylogenymentioning

confidence: 99%

The description of Haematococcus privus sp. nov. (Chlorophyceae, Chlamydomonadales) from North America

Buchheim¹,

Silver²,

Johnson³

et al. 2023

Algae

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“…99% of total pigment content) ( Table 1 ). It is deposited in the form of mono- and diesters with fatty acids with predominant monoesters [ 47 , 111 ].…”

Section: Diversity and Distribution Of Unicellular Carotenogenic Algaementioning

confidence: 99%

Diversity and Distribution of Carotenogenic Algae in Europe: A Review

Chekanov

2023

Marine Drugs

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Microalgae are the richest source of natural carotenoids, which are valuable pigments with a high share of benefits. Often, carotenoid-producing algae inhabit specific biotopes with unfavorable or even extremal conditions. Such biotopes, including alpine snow fields and hypersaline ponds, are widely distributed in Europe. They can serve as a source of new strains for biotechnology. The number of algal species used for obtaining these compounds on an industrial scale is limited. The data on them are poor. Moreover, some of them have been reported in non-English local scientific articles and theses. This review aims to summarize existing data on microalgal species, which are known as potential carotenoid producers in biotechnology. These include Haematococcus and Dunaliella, both well-known to the scientific community, as well as less-elucidated representatives. Their distribution will be covered throughout Europe: from the Greek Mediterranean coast in the south to the snow valleys in Norway in the north, and from the ponds in Amieiro (Portugal) in the west to the saline lakes and mountains in Crimea (Ukraine) in the east. A wide spectrum of algal secondary carotenoids is reviewed: β-carotene, astaxanthin, canthaxanthin, echinenone, adonixanthin, and adonirubin. For convenience, the main concepts of biology of carotenoid-producing algae are briefly explained.

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“…Psychrophiles can produce protective pigments, such as chlorophylls, carotenoids, and phenols [95,104,126,144,145], which are commercially useful, e.g., the carotenoid astaxanthin [97,146]. They can synthesize cold-active enzymes to sustain their cell cycle.…”

Section: Potential Uses Of Psychrophilesmentioning

confidence: 99%

Extremophilic Microorganisms in Central Europe

et al. 2021

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Extremophiles inhabit a wide variety of environments. Here we focus on extremophiles in moderate climates in central Europe, and particularly in Slovenia. Although multiple types of stress often occur in the same habitat, extremophiles are generally combined into groups according to the main stressor to which they are adapted. Several types of extremophiles, e.g., oligotrophs, are well represented and diverse in subsurface environments and karst regions. Psychrophiles thrive in ice caves and depressions with eternal snow and ice, with several globally distributed snow algae and psychrophilic bacteria that have been discovered in alpine glaciers. However, this area requires further research. Halophiles thrive in salterns while thermophiles inhabit thermal springs, although there is little data on such microorganisms in central Europe, despite many taxa being found globally. This review also includes the potential use of extremophiles in biotechnology and bioremediation applications.

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Intraspecific trait variation affecting astaxanthin productivity in two Haematococcus (Chlorophyceae) species

Cited by 13 publications

References 56 publications

The description of Haematococcus privus sp. nov. (Chlorophyceae, Chlamydomonadales) from North America

The description of Haematococcus privus sp. nov. (Chlorophyceae, Chlamydomonadales) from North America

Diversity and Distribution of Carotenogenic Algae in Europe: A Review

Extremophilic Microorganisms in Central Europe

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