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Millennial-scale hydroclimate control of tropical soil carbon storage 期刊论文
NATURE, 2020, 581 (7806) : 63-+
作者:  Lam, Tommy Tsan-Yuk;  Jia, Na;  Zhang, Ya-Wei;  Shum, Marcus Ho-Hin;  Jiang, Jia-Fu;  Zhu, Hua-Chen;  Tong, Yi-Gang;  Shi, Yong-Xia;  Ni, Xue-Bing;  Liao, Yun-Shi;  Li, Wen-Juan;  Jiang, Bao-Gui;  Wei, Wei;  Yuan, Ting-Ting;  Zheng, Kui;  Cui, Xiao-Ming;  Li, Jie;  Pei, Guang-Qian
收藏  |  浏览/下载:25/0  |  提交时间:2020/05/13

Over the past 18,000 years, the residence time and amount of soil carbon stored in the Ganges-Brahmaputra basin have been controlled by the intensity of Indian Summer Monsoon rainfall, with greater carbon destabilization during wetter, warmer conditions.


The storage of organic carbon in the terrestrial biosphere directly affects atmospheric concentrations of carbon dioxide over a wide range of timescales. Within the terrestrial biosphere, the magnitude of carbon storage can vary in response to environmental perturbations such as changing temperature or hydroclimate(1), potentially generating feedback on the atmospheric inventory of carbon dioxide. Although temperature controls the storage of soil organic carbon at mid and high latitudes(2,3), hydroclimate may be the dominant driver of soil carbon persistence in the tropics(4,5)  however, the sensitivity of tropical soil carbon turnover to large-scale hydroclimate variability remains poorly understood. Here we show that changes in Indian Summer Monsoon rainfall have controlled the residence time of soil carbon in the Ganges-Brahmaputra basin over the past 18,000 years. Comparison of radiocarbon ages of bulk organic carbon and terrestrial higher-plant biomarkers with co-located palaeohydrological records(6) reveals a negative relationship between monsoon rainfall and soil organic carbon stocks on a millennial timescale. Across the deglaciation period, a depletion of basin-wide soil carbon stocks was triggered by increasing rainfall and associated enhanced soil respiration rates. Our results suggest that future hydroclimate changes in tropical regions are likely to accelerate soil carbon destabilization, further increasing atmospheric carbon dioxide concentrations.


  
Source directional apportionment of ambient PM2.5 in urban and industrial sites at a megacity in China 期刊论文
ATMOSPHERIC RESEARCH, 2020, 235
作者:  Liu, Baoshuang;  Li, Yafei;  Wang, Lu;  Bi, Xiaohui;  Dong, Haiyan;  Sun, Xiaoyun;  Xiao, Zhimei;  Zhang, Yufen;  Feng, Yinchang
收藏  |  浏览/下载:14/0  |  提交时间:2020/07/02
Source directional apportionment (SDA)  PM2.5  Backward trajectory analysis  Positive matrix factorization (PMF)  
Petrogenesis of Late Triassic high-Mg diorites and associated granitoids with implications for Paleo-Tethys evolution in the northeast Tibetan Plateau 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (5-6) : 955-976
作者:  Tan, Jun;  Wei, Jun-Hao;  Zhao, Shao-Qing;  Li, Yan-Jun;  Liu, Yan;  Liu, Xiao-Yang;  Zhang, Fei;  Gan, Jin-Rong;  Wang, Zhi-Hua
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/02
The Great Oxidation Event expanded the genetic repertoire of arsenic metabolism and cycling 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (19) : 10414-10421
作者:  Chen, Song-Can;  Sun, Guo-Xin;  Yan, Yu;  Konstantinidis, Konstantinos T.;  Zhang, Si-Yu;  Deng, Ye;  Li, Xiao-Min;  Cui, Hui-Ling;  Musat, Florin;  Popp, Denny;  Rosen, Barry P.;  Zhu, Yong-Guan
收藏  |  浏览/下载:21/0  |  提交时间:2020/05/13
arsenic  detoxification  evolution  oxygen  biogeochemistry  
Heterogeneous N2O5 reactions on atmospheric aerosols at four Chinese sites: improving model representation of uptake parameters 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (7) : 4367-4378
作者:  Yu, Chuan;  Wang, Zhe;  Xia, Men;  Fu, Xiao;  Wang, Weihao;  Tham, Yee Jun;  Chen, Tianshu;  Zheng, Penggang;  Li, Hongyong;  Shan, Ye;  Wang, Xinfeng;  Xue, Likun;  Zhou, Yue;  Yue, Dingli;  Ou, Yubo;  Gao, Jian;  Lu, Keding;  Brown, Steven S.;  Zhang, Yuanhang;  Wang, Tao
收藏  |  浏览/下载:14/0  |  提交时间:2020/07/02
Chemical characterization and source analysis of water-soluble inorganic ions in PM2.5 from a plateau city of Kunming at different seasons 期刊论文
ATMOSPHERIC RESEARCH, 2020, 234
作者:  Guo, Wei;  Zhang, Zhongyi;  Zheng, Nengjian;  Luo, Li;  Xiao, Huayun;  Xiao, Hongwei
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
PM2.5  Water-soluble inorganic ions (WSIIs)  Source identification  Seasonality  Kunming  
Origin of complexity in haemoglobin evolution 期刊论文
NATURE, 2020
作者:  Cheema, Suraj S.;  Kwon, Daewoong;  Shanker, Nirmaan;  dos Reis, Roberto;  Hsu, Shang-Lin;  Xiao, Jun;  Zhang, Haigang;  Wagner, Ryan;  Datar, Adhiraj;  McCarter, Margaret R.;  Serrao, Claudy R.;  Yadav, Ajay K.;  Karbasian, Golnaz;  Hsu, Cheng-Hsiang;  Tan, Ava J.;  Wang, Li-Chen;  Thakare, Vishal;  Zhang, Xiang;  Mehta, Apurva;  Karapetrova, Evguenia;  Chopdekar, Rajesh, V;  Shafer, Padraic;  Arenholz, Elke;  Hu, Chenming;  Proksch, Roger;  Ramesh, Ramamoorthy;  Ciston, Jim;  Salahuddin, Sayeef
收藏  |  浏览/下载:50/0  |  提交时间:2020/07/03

Most proteins associate into multimeric complexes with specific architectures(1,2), which often have functional properties such as cooperative ligand binding or allosteric regulation(3). No detailed knowledge is available about how any multimer and its functions arose during evolution. Here we use ancestral protein reconstruction and biophysical assays to elucidate the origins of vertebrate haemoglobin, a heterotetramer of paralogous alpha- and beta-subunits that mediates respiratory oxygen transport and exchange by cooperatively binding oxygen with moderate affinity. We show that modern haemoglobin evolved from an ancient monomer and characterize the historical '  missing link'  through which the modern tetramer evolved-a noncooperative homodimer with high oxygen affinity that existed before the gene duplication that generated distinct alpha- and beta-subunits. Reintroducing just two post-duplication historical substitutions into the ancestral protein is sufficient to cause strong tetramerization by creating favourable contacts with more ancient residues on the opposing subunit. These surface substitutions markedly reduce oxygen affinity and even confer cooperativity, because an ancient linkage between the oxygen binding site and the multimerization interface was already an intrinsic feature of the protein'  s structure. Our findings establish that evolution can produce new complex molecular structures and functions via simple genetic mechanisms that recruit existing biophysical features into higher-level architectures.


Experimental analysis of reconstructed ancestral globins reveals that haemoglobin'  s complex tetrameric structure and oxygen-binding functions evolved by simple genetic and biophysical mechanisms.


  
Nanoplasma-enabled picosecond switches for ultrafast electronics (vol 579, pg 534, 2020) 期刊论文
NATURE, 2020, 580 (7803) : E8-E8
作者:  Li, Jing;  Xu, Chuanliang;  Lee, Hyung Joo;  Ren, Shancheng;  Zi, Xiaoyuan;  Zhang, Zhiming;  Wang, Haifeng;  Yu, Yongwei;  Yang, Chenghua;  Gao, Xiaofeng;  Hou, Jianguo;  Wang, Linhui;  Yang, Bo;  Yang, Qing;  Ye, Huamao;  Zhou, Tie;  Lu, Xin;  Wang, Yan;  Qu, Min;  Yang, Qingsong;  Zhang, Wenhui;  Shah, Nakul M.;  Pehrsson, Erica C.;  Wang, Shuo;  Wang, Zengjun;  Jiang, Jun;  Zhu, Yan;  Chen, Rui;  Chen, Huan;  Zhu, Feng;  Lian, Bijun;  Li, Xiaoyun;  Zhang, Yun;  Wang, Chao;  Wang, Yue;  Xiao, Guangan;  Jiang, Junfeng;  Yang, Yue;  Liang, Chaozhao;  Hou, Jianquan;  Han, Conghui;  Chen, Ming;  Jiang, Ning;  Zhang, Dahong;  Wu, Song;  Yang, Jinjian;  Wang, Tao;  Chen, Yongliang;  Cai, Jiantong;  Yang, Wenzeng;  Xu, Jun;  Wang, Shaogang;  Gao, Xu;  Wang, Ting;  Sun, Yinghao
收藏  |  浏览/下载:25/0  |  提交时间:2020/07/03
Recycling and metabolic flexibility dictate life in the lower oceanic crust 期刊论文
NATURE, 2020, 579 (7798) : 250-+
作者:  Zhou, Peng;  Yang, Xing-Lou;  Wang, Xian-Guang;  Hu, Ben;  Zhang, Lei;  Zhang, Wei;  Si, Hao-Rui;  Zhu, Yan;  Li, Bei;  Huang, Chao-Lin;  Chen, Hui-Dong;  Chen, Jing;  Luo, Yun;  Guo, Hua;  Jiang, Ren-Di;  Liu, Mei-Qin;  Chen, Ying;  Shen, Xu-Rui;  Wang, Xi;  Zheng, Xiao-Shuang;  Zhao, Kai;  Chen, Quan-Jiao;  Deng, Fei;  Liu, Lin-Lin;  Yan, Bing;  Zhan, Fa-Xian;  Wang, Yan-Yi;  Xiao, Geng-Fu;  Shi, Zheng-Li
收藏  |  浏览/下载:37/0  |  提交时间:2020/05/13

The lithified lower oceanic crust is one of Earth'  s last biological frontiers as it is difficult to access. It is challenging for microbiota that live in marine subsurface sediments or igneous basement to obtain sufficient carbon resources and energy to support growth(1-3) or to meet basal power requirements(4) during periods of resource scarcity. Here we show how limited and unpredictable sources of carbon and energy dictate survival strategies used by low-biomass microbial communities that live 10-750 m below the seafloor at Atlantis Bank, Indian Ocean, where Earth'  s lower crust is exposed at the seafloor. Assays of enzyme activities, lipid biomarkers, marker genes and microscopy indicate heterogeneously distributed and viable biomass with ultralow cell densities (fewer than 2,000 cells per cm(3)). Expression of genes involved in unexpected heterotrophic processes includes those with a role in the degradation of polyaromatic hydrocarbons, use of polyhydroxyalkanoates as carbon-storage molecules and recycling of amino acids to produce compounds that can participate in redox reactions and energy production. Our study provides insights into how microorganisms in the plutonic crust are able to survive within fractures or porous substrates by coupling sources of energy to organic and inorganic carbon resources that are probably delivered through the circulation of subseafloor fluids or seawater.


  
The Xiaoqinling metamorphic core complex: A record of Early Cretaceous backarc extension along the southern part of the North China Craton 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (3-4) : 617-637
作者:  Li, Yunjian;  Zhu, Guang;  Su, Nan;  Xiao, Shiye;  Zhang, Shuai;  Liu, Cheng;  Xie, Chenglong;  Yin, Hao;  Wu, Xiaodong
收藏  |  浏览/下载:10/0  |  提交时间:2020/07/02