Agronomy Department, Fort Lauderdale Research and Education Center, University of Florida/IFAS, Davie, FL 33314, USA.
Mol Phylogenet Evol. 2021 Jul;160:107010. doi: 10.1016/j.ympev.2020.107010. Epub 2020 Nov 11.
Benthic cyanobacterial mats are an integral component of aquatic communities in tropical marine waters. These mats can develop into massive nuisances at risk of expansion due to climate change. The extent of diversity occurring within these mats, still remains largely unexplored, especially in Florida. To reveal this diversity, coastal environments of South Florida were sampled and subsequently processed for isolation and systematic identification. Three new genera are proposed based on the molecular phylogeny, morphology, and ecology. These new genera are characterized by discoid cells and homocytous, unbranched filaments without sheaths. Individual genus morphological differences include either rounded bent, rounded, or conical rounded apical cells. A unique molecular fingerprint including a base pair insert within the 16S rRNA gene sequence and genetic similarities facilitates the delimitation of a novel family Vermifilaceae. Using the polyphasic approach, our research presents three new genera and four new species of marine cyanobacteria inhabiting coastal ecosystems of South Florida.
底栖蓝藻席是热带海洋水域水生群落的一个组成部分。由于气候变化，这些席状物有可能大规模蔓延，成为有害物。这些席状物内发生的多样性在很大程度上仍未被探索，尤其是在佛罗里达州。为了揭示这种多样性，对南佛罗里达州的沿海环境进行了采样，随后进行了分离和系统鉴定。基于分子系统发育、形态和生态学，提出了三个新属。这些新属的特征是盘状细胞和同形、不分枝的无鞘丝状。各个属的形态差异包括圆形弯曲、圆形或圆锥形的圆形顶端细胞。独特的分子指纹包括在 16S rRNA 基因序列内的碱基对插入和遗传相似性，有助于划定一个新的丝状菌科 Vermifilaceae。本研究采用多相方法，介绍了三种新的海洋蓝藻属和四种生活在南佛罗里达州沿海生态系统中的新种。
