Distribution of dissolved iron and bacteria producing the photoactive siderophore, vibrioferrin, in waters off Southern California and Northern Baja

Distribution of dissolved iron and bacteria producing the photoactive siderophore, vibrioferrin, in waters off Southern California and Northern Baja
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南加州和北巴哈海域溶解的铁和产生光活性铁载体、弧菌铁蛋白的细菌的分布

DOI:
10.1007/s10534-018-00163-3
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发表时间:
2019
期刊:
影响因子:
3.5
通讯作者:
Carrano, Carl J.
Carrano, Carl J.
中科院分区:
生物学3区
文献类型:
--
作者:
Yarimizu, Kyoko;Cruz-López, Ricardo;García-Mendoza, Ernesto;Edwards, Matthew;Carter, Melissa L.;Carrano, Carl J.

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浮游植物大量繁殖会对海洋生态系统造成严重影响,因为它们会产生内源性毒素,或者由于其巨大的生物量,对当地经济和公众健康造成重大影响。尽管多年的努力,这些有害藻类水华的原因仍然没有完全了解。我们的假设是,产生光活性铁载体的细菌可能为浮游植物提供生物可利用的铁源,从而刺激藻类生长并支持水华动态。在这里,我们将铁浓度,浮游植物细胞计数,细菌细胞丰度和从2017年在加州湾和下加利福尼亚北方海岸外的太平洋以及在加利福尼亚州圣地亚哥斯克里普斯码头的多年采样中采集的水样中的光敏铁载体弧菌铁蛋白生物合成基因的拷贝数相关联。我们发现,在太平洋/加州湾沿海沃茨中,产生光活性铁载体弧菌铁蛋白的细菌占总细菌的百分比惊人地高(高达9%)。振动铁蛋白的独特性质和其细菌生产者的广泛流行表明,它可能有助于通过光氧化还原反应产生铁的生物利用度显着。
Phytoplankton blooms can cause acute effects on marine ecosystems due either to their production of endogenous toxins or to their enormous biomass leading to major impacts on local economies and public health. Despite years of effort, the causes of these Harmful Algal Blooms are still not fully understood. Our hypothesis is that bacteria that produce photoactive siderophores may provide a bioavailable source of iron for phytoplankton which could in turn stimulate algal growth and support bloom dynamics. Here we correlate iron concentrations, phytoplankton cell counts, bacterial cell abundance, and copy numbers for a photoactive siderophore vibrioferrin biosynthesis gene in water samples taken from 2017 cruises in the Gulf of California, and the Pacific Ocean off the coast of northern Baja California as well as during a multiyear sampling at Scripps Pier in San Diego, CA. We find that bacteria producing the photoactive siderophore vibrioferrin, make up a surprisingly high percentage of total bacteria in Pacific/Gulf of California coastal waters (up to 9%). Vibroferrin’s unique properties and the widespread prevalence of its bacterial producers suggest that it may contribute significantly to generating bioavailability of iron via photoredox reactions.
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