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首页> 美国卫生研究院文献>Frontiers in Microbiology >Viral Impact on Prokaryotic and Microalgal Activities in the Microphytobenthic Biofilm of an Intertidal Mudflat (French Atlantic Coast)
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Viral Impact on Prokaryotic and Microalgal Activities in the Microphytobenthic Biofilm of an Intertidal Mudflat (French Atlantic Coast)

机译：病毒对潮间带滩涂（法国大西洋海岸）微底栖生物膜中原核和微藻活性的影响

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This is the first report on viriobenthos activity within the microbial biofilm located at the top-surface of the intertidal mudflat during emersion in Marennes-Oléron Bay (France). By combining in situ and ex situ approaches, the viral production (VP) was linked to the dynamics of prokaryotes and microphytobenthos (MPB). VP averaged 2–4 × 108 viruses ml−1 h−1. VP correlated positively with the Virus to Prokaryote Ratio, and both were correlated negatively with the water content. The virus-induced mortality of prokaryotes was lower in winter than in summer (6.8 vs. 39.7% of the production) and the C-shunting may supply 2–12% of their Carbon Demand, respectively. VP accounted for 79% of loss in Prokaryotes but the response was delayed compared to the increase in VP suggesting a simultaneous release of viruses of MPB origin. This hypothesis is supported by capsid-sizing of virions by transmission electronic microscopy and bioassays. Harvesting and ex situ maintenance of top-surface sediments was carried out to monitor the dynamics of viruses, prokaryotes and MPB after inoculation with benthic or planktonic viruses. Benthic viruses modified the prokaryotic and MPB dynamics and decreased the photosynthesis efficiency in contrast to planktonic viruses that impacted MPB but not the prokaryotes.
机译：这是法国马雷内斯-奥尔隆湾出海期间潮间带滩涂上表面微生物生物膜内底栖动物活动的首次报道。通过结合原位和异位方法，病毒生产（VP）与原核生物和微植物底栖动物（MPB）的动力学相关。 VP平均2–4×10 8 病毒ml -1 h -1 。 VP与病毒与原核生物的比例呈正相关，而与水含量呈负相关。病毒引起的原核生物的死亡率在冬季要比夏季要低（分别为6.8和39.7％），C型分流器可以分别满足其碳需求的2-12％。 VP占原核生物损失的79％，但与VP的增加相比，反应被延迟了，表明同时释放了MPB来源的病毒。通过透射电子显微镜和生物测定对病毒体进行衣壳​​大小确定，支持了这一假设。进行底栖或浮游病毒接种后，对表层沉积物进行收集和移地维护以监测病毒，原核生物和MPB的动态。与影响MPB但不影响原核生物的浮游病毒相反，底栖病毒改变了原核生物和MPB的动力学，降低了光合作用效率。

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