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首页> 外文期刊>Aquatic Sciences >Biochemical characteristics of alga-bacterial mats and invertebrates from shallow-water hydrothermal fields of the West Pacific Ocean
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Biochemical characteristics of alga-bacterial mats and invertebrates from shallow-water hydrothermal fields of the West Pacific Ocean

机译：西太平洋浅水热液区藻类细菌垫和无脊椎动物的生化特征

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摘要

In this study we assessed the biochemical adaptations of biotic specimens from the hydrothermal vent fields from different geographical zones. Algabacte-rial and bacterial mats and specimens of bivalves (9 species) and sea urchins (2 species) from different coastal shallow-water fields of hydrothermal activity along the West Rift zones of the Pacific Ocean were sampled to compare biochemical activities to volcanogenic chemical characteristics. The algabacterial and bacterial mat cells and subcellular fractions of bivalve gills and sea urchin guts were measured for 5-aminolevulinic acid (ALA), cy-tochromes b, (c + c_1), (a + a_3) and P450 (CYP), and activities of ALA synthetase and CYP-dependent aminopy-rine N-demethylase (APND). The algabacterial mats from the Kuril Islands and New Zealand displayed comparable ALA and cytochrome levels and enzyme activities. Similar ALA synthesis, APND activity, and levels of cytochromes b and (c + c_1) were observed in bacterial mats from hydrothermal fields from Kuriles, New Britain Island and New Zealand. More active ALA synthesis, APND activity and enhanced content of cytochromes b and (c + c_1) and lower levels of CYP were found in bacterial mats than in algabacterial mats. Further, all bivalves influenced by hydrothermal discharges had elevated CYP levels and APND activity as well as a significant increase in ALA content and ALA synthesis (P < 0.05). Statistically sufficient (P < 0.05) alterations in ALA synthesis, APND activity and total CYP level were found in sea urchins under hydrothermal influence. Our findings contribute to the global assessment of hydrothermal effluents on biota and indicate that living conditions near hydrothermal vents accelerate metabolism of bivalves and sea urchins in examined hydrothermal zones in the northern and southern West Pacific Ocean.
机译：在这项研究中，我们评估了来自不同地理区域的热液喷口领域的生物标本的生物化学适应性。采样了沿太平洋西纵裂带不同热液沿海沿海浅水区的藻类和细菌垫以及双壳类动物（9种）和海胆（2种）的标本，以比较生物化学活性与火山成因化学特征。测量了双壳g和海胆肠的藻细菌和细菌细胞以及亚细胞部分的5-氨基乙酰丙酸（ALA），细胞色素b，（c + c_1），（a + a_3）和P450（CYP），以及合成酶和CYP依赖的氨基嘌呤N-脱甲基酶（APND）的活性。来自千岛群岛和新西兰的藻菌垫显示出相当的ALA和细胞色素水平以及酶活性。在来自库列斯，新不列颠岛和新西兰的热液田的细菌垫中观察到了类似的ALA合成，APND活性以及细胞色素b和（c + c_1）的水平。与藻类席相比，在细菌席中发现了更活跃的ALA合成，APND活性和细胞色素b和（c + c_1）含量增加以及CYP水平降低。此外，所有受热液排放影响的双壳类动物均具有较高的CYP水平和APND活性，并且ALA含量和ALA合成显着增加（P <0.05）。在水热影响下，海胆中ALA合成，APND活性和总CYP水平在统计学上有足够的变化（P <0.05）。我们的发现有助于对生物群上的热液排放物进行全球评估，并表明热液喷口附近的生活条件促进了西太平洋北部和南部受热液区中双壳类和海胆的新陈代谢。

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