Iron Speciation and Physiological Analysis Indicate that Synechococcus sp. PCC 7002 Reduces Amorphous and Crystalline Iron Forms in Synthetic Seawater Medium

被引：2

作者：

Hunnestad, Annie Vera ^{[1
]}

Vogel, Anne Ilse Maria ^{[2
]}

Digernes, Maria Guadalupe ^{[1
]}

Ardelan, Murat Van ^{[1
]}

Hohmann-Marriott, Martin Frank ^{[2
]}

机构：

[1] Norwegian Univ Sci & Technol NTNU, Dept Chem, N-7491 Trondheim, Norway

[2] Norwegian Univ Sci & Technol NTNU, Dept Biotechnol & Food Sci, PhotoSynLab, N-7491 Trondheim, Norway

来源：

JOURNAL OF MARINE SCIENCE AND ENGINEERING | 2020年 / 8卷 / 12期

关键词：

cyanobacteria; Synechococcus; iron biogeochemistry; iron acquisition; iron limitation; iron speciation; photosynthesis; PHOTOSYSTEM-I; SP PCC7942; REDUCTION; BINDING; ISIA; CYANOBACTERIA; PHYTOPLANKTON; FE(III); BIOAVAILABILITY; COMPLEXATION;

D O I：

10.3390/jmse8120996

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

Cyanobacteria have high iron requirements due to iron-rich photosynthetic machineries. Despite the high concentrations of iron in the Earth's crust, iron is limiting in many marine environments due to iron's low solubility. Oxic conditions leave a large portion of the ocean's iron pool unavailable for biotic uptake, and so the physiochemical properties of iron are hugely important for iron's bioavailability. Our study is the first to investigate the effect of iron source on iron internalization and extracellular reduction by Synechococcus sp. PCC 7002. The results indicated that the amorphous iron hydrolysis species produced by FeCl3 better support growth in Synechococcus through more efficient iron internalization and a larger degree of extracellular reduction of iron than the crystalline FeO(OH). An analysis of dissolved iron (II) indicated that biogenic reduction took place in cultures of Synechococcus grown on both FeCl3 and FeO(OH).

引用

页码：1 / 18

页数：18

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