Adaptive traits of Planctomycetota bacteria to thrive in macroalgal habitats and establish mutually beneficial relationship with macroalgae

IF 5.1 2区 地球科学 Q1 LIMNOLOGY Limnology and Oceanography Letters Pub Date : 2024-07-10 DOI:10.1002/lol2.10424
Xueyan Gao, Yihua Xiao, Ziwei Wang, Hanshuang Zhao, Yufei Yue, Shailesh Nair, Zenghu Zhang, Yongyu Zhang
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Abstract

Bacteria and macroalgae share an inseparable relationship, jointly influencing coastal ecosystems. Within macroalgae habitats, Planctomycetota, a group of bacteria notoriously challenging to cultivate, often dominate. However, the mechanisms facilitating their persistence in this environment remain unclear. Here, we successfully isolated a novel Planctomycetota bacterium, Stieleria sp. HD01, from the surface of kelp. We demonstrated that HD01 possesses a robust ability to metabolize fucoidan, which constitutes half of the kelp‐derived organic carbon and exhibits resistance to attack by most microorganisms. Moreover, HD01 can utilize a broad spectrum of other organics, indicating its metabolic versatility and competitive prowess within algal environments. Additionally, HD01 can secrete antagonistic substances against other bacteria, form biofilms, and employ superoxide dismutase and catalase to resist oxidative stress, further consolidating its ecological fitness. Comparative metagenomics analysis suggested that Planctomycetota may have a mutually beneficial relationship with kelp.
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Planctomycetota 细菌在大型藻类生境中生长并与大型藻类建立互利关系的适应性特征
细菌与大型藻类有着密不可分的关系,共同影响着沿海生态系统。在大型藻类栖息地中,Planctomycetota(一种众所周知难以培养的细菌群)往往占据主导地位。然而,促进它们在这种环境中持续存在的机制仍不清楚。在这里,我们成功地从海带表面分离出了一种新型的 Planctomycetota 细菌--Stieleria sp.我们证明了 HD01 具有强大的代谢褐藻糖胶的能力,褐藻糖胶占海带有机碳的一半,并对大多数微生物的攻击具有抵抗力。此外,HD01 还能利用范围广泛的其他有机物,这表明它在藻类环境中具有多功能代谢能力和竞争能力。此外,HD01 还能分泌拮抗其他细菌的物质,形成生物膜,并利用超氧化物歧化酶和过氧化氢酶来抵抗氧化压力,从而进一步巩固其生态适应性。比较元基因组学分析表明,Planctomycetota 可能与海带存在互利关系。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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