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Objection to the proposition of the new genus Abyssivirga

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HAL Id: hal-01622044

https://hal-amu.archives-ouvertes.fr/hal-01622044

Submitted on 27 Aug 2018

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Objection to the proposition of the new genus

Abyssivirga

Anne Postec, Bernard Ollivier, Marie-Laure Fardeau

To cite this version:

Anne Postec, Bernard Ollivier, Marie-Laure Fardeau. Objection to the proposition of the new genus

Abyssivirga. International Journal of Systematic and Evolutionary Microbiology, Microbiology

Soci-ety, 2017, 67 (1), pp.174. �10.1099/ijsem.0.001601�. �hal-01622044�

(2)

Objection to the proposition of the new genus Abyssivirga

Anne Postec,

*

Bernard Ollivier and Marie-Laure Fardeau

We have read with interest the recent paper published by

Schouw et al. [1] in IJSEM (Vol 66, pp. 1724–1734) entitled:

‘Abyssivirga alkaniphila gen. nov., sp. nov., an

alkane-degrading, anaerobic bacterium from a deep-sea

hydrother-mal vent system, and emended descriptions of

Natranaero-virga pectinivora and NatranaeroNatranaero-virga hydrolytica’.

We disagree with the proposal of Abyssivirga as a new genus

due to phylogenetic considerations as shown below. Indeed,

we noticed that a

BLAST

analysis of the Abyssivirga

alkani-phila 16S rRNA gene sequence indicated 99.4 % similarity

with Vallitalea guaymasensis isolated from sediments of the

Guaymas Basin, and 96.1 % with Vallitalea pronyensis

iso-lated from a hydrothermal chimney in Prony Bay. Both

Val-litalea species have been fully characterized in IJSEM [2, 3].

Based on phylogenetic analyses, we believe that the proposal

of the new genus Abyssivirga should be reconsidered. A.

alka-niphila should be reassigned to the genus Vallitalea, and

possi-bly as a novel species, ‘Vallitalea alkaniphila’, if demonstrated

by significant DNA–DNA hybridization and phenotypic

differences.

With the aim to clearly establish the phylogenetic position

of A. alkaniphila and its effective affiliation to the genus

Vallitalea, a phylogenetic tree is reconstructed here (Fig. 1).

References

1. Schouw A, Leiknes Eide T, Stokke R, Birger Pedersen R, Helene Steen I et al. Abyssivirga alkaniphila gen. nov., sp. nov., an alkane-degrading, anaerobic bacterium from a deep-sea hydrothermal vent system, and emended descriptions of Natranaerovirga pectini-vora and Natranaerovirga hydrolytica. Int J Syst Evol Microbiol 2016; 66:1724–1734.

2. Lakhal R, Pradel N, Postec A, Hamdi M, Ollivier B et al. Vallitalea guaymasensis gen. nov., sp. nov., isolated from marine sediment. Int J Syst Evol Microbiol 2013;63:3019–3023.

3. Ben Aissa F, Postec A, Erauso G, Payri C, Pelletier B et al. Vallitalea pronyensis sp. nov., isolated from a marine alkaline hydrothermal chimney. Int J Syst Evol Microbiol 2014;64:1160–1165.

Lachnospiraceae

Natranaerovirga hydrolytica APP2T (GQ863487)

Natranaerovirga pectinivora AP3T (GQ922846)

Vallitalea pronyensis Ni3T (KC876639)

Abyssivirga alkaniphila L81T (KP233895)

Vallitalea guaymasensis Ra1766G1T (HE805640)

‘Defluviitalea phaphyphila’ Alg1 (KJ411293)

Defluviitalea saccharophila6 LT2T (HQ020487)

Gracilibacter thermotolerans JW/YJL-S1T (DQ117465)

Lutispora thermophila EBR46T (NR 041236)

Ruminococcaceae Bacillus subtilis DSM10T (AJ276351) 100 97 100 100 100 100 74 88 100 71 99 0.02

Fig. 1. Phylogenetic tree showing the position of Abyssivirga alkaniphila L81Twith the type strains of the closest described species. The neighbour-joining method was used, with Kimura’s two-parameter model. Bootstrap values below 70 are not shown (from 1000 replicates). In total, 1211 positions were used in the final dataset. Bar, 0.02 changes per position.

Author affiliation: Aix-Marseille Universite, Universite du Sud Toulon-Var, CNRS/INSU, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 13288, Marseille, cedex 09, France.

*Correspondence: Anne Postec, anne.postec@univ-amu.fr Keywords: Vallitalea; Abyssivirga.

Figure

Fig. 1. Phylogenetic tree showing the position of Abyssivirga alkaniphila L81 T with the type strains of the closest described species.

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