Herbivorous turtle ants obtain essential nutrients from a conserved nitrogen-recycling gut microbiome.
Herbivorous turtle ants obtain essential nutrients from a conserved nitrogen-recycling gut microbiome.
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DOI：
10.1038/s41467-018-03357-y
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发表时间：
2018-03-06
影响因子：
16.6
通讯作者：
Russell JA
中科院分区：
文献类型：
--
作者：
Hu Y;Sanders JG;Łukasik P;D'Amelio CL;Millar JS;Vann DR;Lan Y;Newton JA;Schotanus M;Kronauer DJC;Pierce NE;Moreau CS;Wertz JT;Engel P;Russell JA
氮的获取对于草食动物来说是一个重大挑战，而蚂蚁食草性的重复起源提高了人们的预期，即营养共生体塑造了它们的多样化。在动物中，由内部共生体提供氮的直接证据很少。在蚂蚁中，只有一种谱系有记录。在这项研究中，我们通过体内实验、宏基因组学和体外测定，剖析了食草头蚁保守的多部分肠道共生中细菌的功能贡献。肠道细菌回收尿素，可能还有尿酸，利用回收的氮来合成宿主大量获得的必需氨基酸。所研究的 17 种头足类物种的特殊核心共生体编码指导这些活动的途径，并且有几种在体外循环氮。这些发现表明，头头蚁的衍生行为和肠道解剖结构存在着高效的氮经济，以及数百万年来保存下来的营养互利共生。肠道细菌在包括蚂蚁在内的昆虫中普遍存在，但它们的确切作用往往尚不清楚。在这里，胡等人。表明微生物通过将氮回收成生物可利用的氨基酸来帮助蚂蚁。这种功能在龟蚁中是保守的，这表明一种古老的营养互利共生关系。
Nitrogen acquisition is a major challenge for herbivorous animals, and the repeated origins of herbivory across the ants have raised expectations that nutritional symbionts have shaped their diversification. Direct evidence for N provisioning by internally housed symbionts is rare in animals; among the ants, it has been documented for just one lineage. In this study we dissect functional contributions by bacteria from a conserved, multi-partite gut symbiosis in herbivorous Cephalotes ants through in vivo experiments, metagenomics, and in vitro assays. Gut bacteria recycle urea, and likely uric acid, using recycled N to synthesize essential amino acids that are acquired by hosts in substantial quantities. Specialized core symbionts of 17 studied Cephalotes species encode the pathways directing these activities, and several recycle N in vitro. These findings point to a highly efficient N economy, and a nutritional mutualism preserved for millions of years through the derived behaviors and gut anatomy of Cephalotes ants. Gut bacteria are prevalent across insects including ants, but their precise roles are often unclear. Here, Hu et al. show that microbes aid ants by recycling nitrogen into bio-available amino acids. This function is conserved across the turtle ants, suggesting an ancient nutritional mutualism.
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影响因子：
56.9
作者：
Davidson, DW;Cook, SC;Chua, TH
通讯作者：
Chua, TH
影响因子：
56.9
作者：
BENEMANN, JR
通讯作者：
BENEMANN, JR
影响因子：
14.9
作者：
Chen IA;Markowitz VM;Chu K;Palaniappan K;Szeto E;Pillay M;Ratner A;Huang J;Andersen E;Huntemann M;Varghese N;Hadjithomas M;Tennessen K;Nielsen T;Ivanova NN;Kyrpides NC
通讯作者：
Kyrpides NC
DOI：
10.1073/pnas.1707186114
发表时间：
2017-09-05
影响因子：
11.1
作者：
Hammer, Tobin J.;Janzen, Daniel H.;Fierer, Noah
通讯作者：
Fierer, Noah
影响因子：
4.9
作者：
Behar, A;Yuval, B;Jurkevitch, E
通讯作者：
Jurkevitch, E