Production of branched tetraether lipids in Tibetan hot springs: A possible linkage to nitrite reduction by thermotolerant or thermophilic bacteria?
Production of branched tetraether lipids in Tibetan hot springs: A possible linkage to nitrite reduction by thermotolerant or thermophilic bacteria?
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西藏温泉中支链四醚脂质的产生：与耐热或嗜热细菌还原亚硝酸盐的可能联系？
DOI：
10.1016/j.chemgeo.2014.08.015
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发表时间：
2014-10
期刊：
影响因子：
3.9
通讯作者：
Brian P. Hedlund
中科院分区：
文献类型：
--
作者：
Li Fuyan;Chuanlun L. Zhang;Shang Wang;Yufei Chen;Chijun Sun;Hailiang Dong;Wenjun Li;Martin G. Klotz;Brian P. Hedlund
支链甘油二烷基甘油四醚（bGDGTs）由细菌产生，最初从土壤和泥炭沼泽中发现；然而，最近有报道在温泉中原位生产bGDGTs。完整极性和岩心bGDGTs的绝对和相对浓度表明，bGDGTs主要在这些温泉中原位产生。冗余分析表明，bGDGT的分布与铵态、亚硝酸盐和硝酸盐浓度以及nirsgene丰度之间存在相关性，这在岩心bGDGT馏分中比在完整极性bGDGT馏分中更能反映出来。对已发表的细菌16S rRNA基因序列的重新分析表明，细菌门-变形杆菌门和拟杆菌门成员的驻留与bGDGTs的新甲基化指数（R(III + II)/I）呈正相关。
Branched glycerol dialkyl glycerol tetraethers (bGDGTs) are produced by bacteria and originally identified from soils and peat bogs; recently, however, in situ production of bGDGTs in hot springs has been reported. Consequently, we designed this study to evaluate the linkage between the distribution of bGDGTs, their biological sources and inferred metabolic processes based on the distribution and abundance of bGDGTs, pertinent water chemistry, thenirSgene (possibly inBeta- andGamma-proteobacteria) and available 16S rRNA (tag) gene pyrosequencing data from 37 Tibetan hot springs. The absolute and relative concentrations of intact polar and core bGDGTs suggest that bGDGTs are predominantly produced in situ in these hot springs. Redundancy analyses revealed correlations between the distribution of bGDGTs and concentrations of ammonium, nitrite, and nitrate and the abundance ofnirSgene, which are better reflected in the core bGDGT fraction than in the respective intact polar bGDGT fraction. Reanalysis of published bacterial 16S rRNA gene sequences showed that residence of members of the bacterial phylaProteobacteriaand Bacteroidetes correlated positively with a new methylation index (R(III + II)/I) of bGDGTs. Some representatives of these taxa examined in this study are capable ofnirS-encoded nitrite reduction, suggesting that bGDGT-synthesizing bacteria might be affiliated with these two phyla in Tibetan hot springs.
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影响因子：
5
作者：
HARVEY, HR;FALLON, RD;PATTON, JS
通讯作者：
PATTON, JS
影响因子：
56.9
作者：
J. Weijers;E. Schefuß;Stefan Schouten;J. Damsté
通讯作者：
J. Weijers;E. Schefuß;Stefan Schouten;J. Damsté
影响因子：
3
作者：
Liu, Xiao-Lei;Leider, Arne;Hinrichs, Kai-Uwe
通讯作者：
Hinrichs, Kai-Uwe
影响因子：
3
作者：
J. Weijers;Stefan Schouten;O. Spaargaren;J. Damsté
通讯作者：
J. Weijers;Stefan Schouten;O. Spaargaren;J. Damsté
中国和尼泊尔近期湖泊沉积物中支链甘油二烷基甘油四醚的分布和温度依赖性。
影响因子：
3.7
作者：
Sun, Qing;Chu, Guoqiang;Lue, Houyuan
通讯作者：
Lue, Houyuan