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Temporal Changes of the Epiphytic Bacteria Community From the Marine Macroalga Ulva lactuca (Santa Marta, Colombian-Caribbean)
Current Microbiology ( IF 2.3 ) Pub Date : 2021-01-03 , DOI: 10.1007/s00284-020-02302-x
Natalia Beatriz Comba González , Albert Nicolás Niño Corredor , Liliana López Kleine , Dolly Montoya Castaño

Microbial communities live on macroalgal surfaces. The identity and abundance of the bacteria making these epiphytic communities depend on the macroalgal host and the environmental conditions. Macroalgae rely on epiphytic bacteria for basic functions (spore settlement, morphogenesis, growth, and protection against pathogens). However, these marine bacterial-macroalgal associations are still poorly understood for macroalgae inhabiting the Colombian Caribbean. This study aimed at characterizing the epiphytic bacterial community from macroalgae of the species Ulva lactuca growing in La Punta de la Loma (Santa Marta, Colombia). We conducted a 16S rRNA gene sequencing-based study of these microbial communities sampled twice a year between 2014 and 2016. Within these communities, the Proteobacteria, Bacterioidetes, Cyanobacteria, Deinococcus-Thermus and Actinobacteria were the most abundant phyla. At low taxonomic levels, we found high variability among epiphytic bacteria from U. lactuca and bacterial communities associated with macroalgae from Germany and Australia. We observed differences in the bacterial community composition across years driven by abundance shifts of Rhodobacteraceae Hyphomonadaceae, and Flavobacteriaceae, probably caused by an increase of seawater temperature. Our results support the need for functional studies of the microbiota associated with U. lactuca, a common macroalga in the Colombian Caribbean Sea.

中文翻译:

来自海洋巨藻石莼(Santa Marta,哥伦比亚-加勒比)的附生细菌群落的时间变化

微生物群落生活在大型藻类表面。形成这些附生群落的细菌的特性和丰度取决于大型藻类宿主和环境条件。大型藻类的基本功能(孢子沉降、形态发生、生长和抵御病原体)依赖附生细菌。然而,对于居住在哥伦比亚加勒比地区的大型藻类,这些海洋细菌-大型藻类的关联仍然知之甚少。本研究旨在表征生长在 La Punta de la Loma(哥伦比亚圣玛尔塔)的 Ulva lactuca 种的大型藻类的附生细菌群落。我们在 2014 年至 2016 年期间对这些微生物群落进行了基于 16S rRNA 基因测序的研究,每年采样两次。 在这些群落中,变形杆菌、拟杆菌、蓝藻、奇异球菌-栖热菌和放线菌是最丰富的门。在低分类水平上,我们发现来自 U. lactuca 的附生细菌和与来自德国和澳大利亚的大型藻类相关的细菌群落之间存在高度变异性。我们观察到细菌群落组成的差异是由于红杆菌科下单胞菌科和黄杆菌科的丰度变化引起的,这可能是由海水温度升高引起的。我们的结果支持对与哥伦比亚加勒比海常见的大型藻类 U. lactuca 相关的微生物群进行功能研究的必要性。我们观察到细菌群落组成的差异是由于红杆菌科下单胞菌科和黄杆菌科的丰度变化引起的,这可能是由海水温度升高引起的。我们的结果支持对与哥伦比亚加勒比海常见的大型藻类 U. lactuca 相关的微生物群进行功能研究的必要性。我们观察到细菌群落组成的差异是由于红杆菌科下单胞菌科和黄杆菌科的丰度变化引起的,这可能是由海水温度升高引起的。我们的结果支持对与哥伦比亚加勒比海常见的大型藻类 U. lactuca 相关的微生物群进行功能研究的必要性。
更新日期:2021-01-03
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