Pseudoalteromonas luteoviolacea is a globally distributed marine bacterium that stimulates the metamorphosis of marine animal larvae, an important bacteria–animal interaction that can promote the recruitment of animals to benthic ecosystems. Recently, different P. luteoviolacea isolates have been shown to produce two stimulatory factors that can induce tubeworm and coral metamorphosis; Metamorphosis‐Associated Contractile structures (MACs) and tetrabromopyrrole (TBP) respectively. However, it remains unclear what proportion of P. luteoviolacea isolates possess the genes encoding MACs, and what phenotypic effect MACs and TBP have on other larval species. Here, we show that 9 of 19 sequenced P. luteoviolacea genomes genetically encode both MACs and TBP. While P. luteoviolacea biofilms producing MACs stimulate the metamorphosis of the tubeworm Hydroides elegans, TBP biosynthesis genes had no effect under the conditions tested. Although MACs are lethal to larvae of the cnidarian Hydractinia symbiologicarpus, P. luteoviolacea mutants unable to produce MACs are capable of stimulating metamorphosis. Our findings reveal a hidden complexity of interactions between a single bacterial species, the factors it produces and two species of larvae belonging to different phyla.

中文翻译：

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海洋细菌 Pseudoalteromonas luteoviolacea 的遗传学检查及其变态诱导因子的影响。

Pseudoalteromonas luteoviolacea是一种全球分布的海洋细菌，可刺激海洋动物幼虫的变态，这是一种重要的细菌-动物相互作用，可以促进动物向底栖生态系统的募集。最近，不同的P。已显示luteoviolacea分离株产生两种可诱导管虫和珊瑚变态的刺激因子；变形相关的收缩结构（MAC）和四溴吡咯（TBP）。然而，目前尚不清楚P 的比例。luteoviolacea分离株具有编码 MACs 的基因，以及 MACs 和 TBP 对其他幼虫物种的表型影响。在这里，我们显示 19 个中的 9 个对P进行了排序。luteoviolacea基因组对 MAC 和 TBP 进行遗传编码。虽然P。产生 MAC 的luteoviolacea生物膜刺激了管虫Hydroides elegans的变态，TBP 生物合成基因在测试条件下没有影响。尽管 MAC 对刺胞动物Hydractinia symbiologicarpus 的幼虫是致命的，P . 不能产生 MACs 的luteoviolacea突变体能够刺激变态。我们的研究结果揭示了单个细菌物种、它产生的因素和属于不同门的两种幼虫之间相互作用的隐藏复杂性。