Haslea ostrearia-like diatoms: biodiversity out of the blue

Romain  Gastineau; Nikolai  Davidovich; Gert Hansen; Jan  Rines; Angela  Wulff; Irena  Kaczmarska; James  Ehrman; Dorothée  Hermann; Florian  Maumus; Yann  Hardivillier; Vincent  Leignel; Boris  Jacquette; Vona  Méléder; Gustaaf  Hallegraeff; Marian  Yallop; Rupert  Perkins; Jean-Paul  Cadoret; Bruno  Saint-Jean; Grégory  Carrier; Jean-Luc  Mouget

doi:10.1016/B978-0-12-408062-1.00015-9

Haslea ostrearia-like diatoms: biodiversity out of the blue

Romain Gastineau, Nikolai Davidovich, Gert Hansen, Jan Rines, Angela Wulff, Irena Kaczmarska, James Ehrman, Dorothée Hermann, Florian Maumus, Yann Hardivillier, Vincent Leignel, Boris Jacquette, Vona Méléder, Gustaaf Hallegraeff, Marian Yallop, Rupert Perkins, Jean-Paul Cadoret, Bruno Saint-Jean, Grégory Carrier, Jean-Luc Mouget

Marine Biology

17 Citations (Scopus)

Abstract

Diatoms are usually referred to as golden-brown microalgae, due to the colour of their plastids and to their pigment composition, mainly carotenoids (fucoxanthin, diadinoxanthin, diatoxanthin), which mask chlorophylls a and c. The species Haslea ostrearia Gaillon/Bory (Simonsen) appears unique because of its extraplastidial bluish colour, a consequence of the presence of a water-soluble blue pigment at cell apices, marennine. When released in seawater, marennine can be fixed on gills of oysters and other bivalves, which turn green. This greening phenomenon is economically exploited in Southwestern France, as it gives an added value to oysters. For decades, this singularity ascribed a worldwide distribution to H. ostrearia, first as Vibrio ostrearius, then Navicula ostrearia, last as H. ostrearia, when the genus Haslea was proposed by R. Simonsen (1974). Indeed, this 'birthmark' (presence of blue apices) made H. ostrearia easily recognisable without further scrutiny and identification of the microalga as well as its presence easily deduced from the greening of bivalves. Consequently, the widely admitted cosmopolitan character of H. ostrearia has only been questioned recently, following the discovery in 2008, of a new species of blue diatom in the Black Sea, Haslea karadagensis. The biodiversity of blue diatoms suddenly increased with the finding of other blue species in the Mediterranean Sea, the Canary Islands, etc., the taxonomic characterization of which is in progress. This review thus focuses on the unsuspected biodiversity of blue diatoms within the genus Haslea. Methods for species determination (morphometrics, chemotaxonomy, genomics), as well as a new species, are presented and discussed.

Original language	English
Title of host publication	Advances in Botanical Research : Sea Plants
Editors	Jean-Pierre Jacquot, Pierre Gadal
Number of pages	25
Volume	71
Publisher	Elsevier
Publication date	2014
Pages	441-465
Chapter	15
ISBN (Print)	9780124080621
ISBN (Electronic)	9780124081079
DOIs	https://doi.org/10.1016/B978-0-12-408062-1.00015-9
Publication status	Published - 2014

Series	Advances in Botanical Research
Volume	71
ISSN	0065-2296

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Haslea ostrearia-like diatoms: biodiversity out of the blueAccepted author manuscript, 1.99 MB

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Gastineau, R., Davidovich, N., Hansen, G., Rines, J., Wulff, A., Kaczmarska, I., Ehrman, J., Hermann, D., Maumus, F., Hardivillier, Y., Leignel, V., Jacquette, B., Méléder, V., Hallegraeff, G., Yallop, M., Perkins, R., Cadoret, J-P., Saint-Jean, B., Carrier, G., & Mouget, J-L. (2014). Haslea ostrearia-like diatoms: biodiversity out of the blue. In J-P. Jacquot, & P. Gadal (Eds.), Advances in Botanical Research : Sea Plants (Vol. 71, pp. 441-465). Elsevier. Advances in Botanical Research Vol. 71 https://doi.org/10.1016/B978-0-12-408062-1.00015-9

Haslea ostrearia-like diatoms : biodiversity out of the blue. / Gastineau, Romain ; Davidovich, Nikolai ; Hansen, Gert et al.

Advances in Botanical Research : Sea Plants. ed. / Jean-Pierre Jacquot; Pierre Gadal. Vol. 71 Elsevier, 2014. p. 441-465 (Advances in Botanical Research, Vol. 71).

Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

Gastineau, R, Davidovich, N, Hansen, G, Rines, J, Wulff, A, Kaczmarska, I, Ehrman, J, Hermann, D, Maumus, F, Hardivillier, Y, Leignel, V, Jacquette, B, Méléder, V, Hallegraeff, G, Yallop, M, Perkins, R, Cadoret, J-P, Saint-Jean, B, Carrier, G & Mouget, J-L 2014, Haslea ostrearia-like diatoms: biodiversity out of the blue. in J-P Jacquot & P Gadal (eds), Advances in Botanical Research : Sea Plants. vol. 71, Elsevier, Advances in Botanical Research, vol. 71, pp. 441-465. https://doi.org/10.1016/B978-0-12-408062-1.00015-9

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abstract = "Diatoms are usually referred to as golden-brown microalgae, due to the colour of their plastids and to their pigment composition, mainly carotenoids (fucoxanthin, diadinoxanthin, diatoxanthin), which mask chlorophylls a and c. The species Haslea ostrearia Gaillon/Bory (Simonsen) appears unique because of its extraplastidial bluish colour, a consequence of the presence of a water-soluble blue pigment at cell apices, marennine. When released in seawater, marennine can be fixed on gills of oysters and other bivalves, which turn green. This greening phenomenon is economically exploited in Southwestern France, as it gives an added value to oysters. For decades, this singularity ascribed a worldwide distribution to H. ostrearia, first as Vibrio ostrearius, then Navicula ostrearia, last as H. ostrearia, when the genus Haslea was proposed by R. Simonsen (1974). Indeed, this 'birthmark' (presence of blue apices) made H. ostrearia easily recognisable without further scrutiny and identification of the microalga as well as its presence easily deduced from the greening of bivalves. Consequently, the widely admitted cosmopolitan character of H. ostrearia has only been questioned recently, following the discovery in 2008, of a new species of blue diatom in the Black Sea, Haslea karadagensis. The biodiversity of blue diatoms suddenly increased with the finding of other blue species in the Mediterranean Sea, the Canary Islands, etc., the taxonomic characterization of which is in progress. This review thus focuses on the unsuspected biodiversity of blue diatoms within the genus Haslea. Methods for species determination (morphometrics, chemotaxonomy, genomics), as well as a new species, are presented and discussed.",

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AU - Gastineau, Romain

AU - Davidovich, Nikolai

AU - Hansen, Gert

AU - Rines, Jan

AU - Wulff, Angela

AU - Kaczmarska, Irena

AU - Ehrman, James

AU - Hermann, Dorothée

AU - Maumus, Florian

AU - Hardivillier, Yann

AU - Leignel, Vincent

AU - Jacquette, Boris

AU - Méléder, Vona

AU - Hallegraeff, Gustaaf

AU - Yallop, Marian

AU - Perkins, Rupert

AU - Cadoret, Jean-Paul

AU - Saint-Jean, Bruno

AU - Carrier, Grégory

AU - Mouget, Jean-Luc

PY - 2014

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N2 - Diatoms are usually referred to as golden-brown microalgae, due to the colour of their plastids and to their pigment composition, mainly carotenoids (fucoxanthin, diadinoxanthin, diatoxanthin), which mask chlorophylls a and c. The species Haslea ostrearia Gaillon/Bory (Simonsen) appears unique because of its extraplastidial bluish colour, a consequence of the presence of a water-soluble blue pigment at cell apices, marennine. When released in seawater, marennine can be fixed on gills of oysters and other bivalves, which turn green. This greening phenomenon is economically exploited in Southwestern France, as it gives an added value to oysters. For decades, this singularity ascribed a worldwide distribution to H. ostrearia, first as Vibrio ostrearius, then Navicula ostrearia, last as H. ostrearia, when the genus Haslea was proposed by R. Simonsen (1974). Indeed, this 'birthmark' (presence of blue apices) made H. ostrearia easily recognisable without further scrutiny and identification of the microalga as well as its presence easily deduced from the greening of bivalves. Consequently, the widely admitted cosmopolitan character of H. ostrearia has only been questioned recently, following the discovery in 2008, of a new species of blue diatom in the Black Sea, Haslea karadagensis. The biodiversity of blue diatoms suddenly increased with the finding of other blue species in the Mediterranean Sea, the Canary Islands, etc., the taxonomic characterization of which is in progress. This review thus focuses on the unsuspected biodiversity of blue diatoms within the genus Haslea. Methods for species determination (morphometrics, chemotaxonomy, genomics), as well as a new species, are presented and discussed.

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Haslea ostrearia-like diatoms: biodiversity out of the blue

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