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Sphingomonas lacusdianchii sp. nov., an attached bacterium inhibited by metabolites from its symbiotic cyanobacterium
Ist Teil von
Applied microbiology and biotechnology, 2024-12, Vol.108 (1), p.309-309, Article 309
Ort / Verlag
Berlin/Heidelberg: Springer Berlin Heidelberg
Erscheinungsjahr
2024
Quelle
MEDLINE
Beschreibungen/Notizen
An alpha-proteobacterial strain JXJ CY 53
T
was isolated from the cyanosphere of
Microcystis
sp. FACHB-905 (MF-905) collected from Lake Dianchi, China. JXJ CY 53
T
was observed to be an aerobic, Gram-stain-negative, oval shaped, and mucus-secreting bacterium. It had C
18:1
ω7c and C
16:0
as the major cellular fatty acids, Q-10 as the predominant ubiquinone, and sphingoglycolipid, diphosphatidylglycerol, phosphatidylcholine, and phosphatidylmethylethanolamine as the polar lipids. The G + C content of DNA was 65.85%. The bacterium had 16S rRNA gene sequence identities of 98.9% and 98.7% with
Sphingomonas panni
DSM 15761
T
and
Sphingomonas hankookensis
KCTC 22579
T
, respectively, while less than 97.4% identities with other members of the genus. Further taxonomic analysis indicated that JXJ CY 53
T
represented a new member of
Sphingomonas
, and the species epithet was proposed as
Sphingomonas lacusdianchii
sp. nov. (type strain JXJ CY 53
T
= KCTC 72813
T
= CGMCC 1.17657
T
). JXJ CY 53
T
promoted the growth of MF-905 by providing bio-available phosphorus and nitrogen, plant hormones, vitamins, and carotenoids. It could modulate the relative abundances of nonculturable bacteria associated with MF-905 and influence the interactions of MF-905 and other bacteria isolated from the cyanobacterium, in addition to microcystin production characteristics. Meanwhile, MF-905 could provide JXJ CY 53
T
dissolved organic carbon for growth, and control the growth of JXJ CY 53
T
by secreting specific chemicals other than microcystins. Overall, these results suggest that the interactions between
Microcystis
and its attached bacteria are complex and dynamic, and may influence the growth characteristics of the cyanobacterium. This study provided new ideas to understand the interactions between
Microcystis
and its attached bacteria.
Key points
•
A novel bacterium (JXJCY 53
T
) was isolated from the cyanosphere of Microcystis sp. FACHB-905 (MF-905)
•
JXJCY 53
T
modulated the growth and microcystin production of MF-905
•
MF-905 could control the attached bacteria by specific chemicals other than microcystins (MCs)