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作者：Chan, J. K.; Parasurama, S.; Atlas, R.; Xu, R.; Jongebloed, U. A.; Alexander, B.; Langenhan, J. M.; Thornton, J. A.; Riffell, J. A.
作者单位：University of Washington; University of Washington Seattle; University of Washington; University of Washington Seattle; Tsinghua University; Seattle University; National Biodiversity Future Center; University of Naples Federico II; Institut Polytechnique de Paris; Ecole Polytechnique; Sorbonne Universite
摘要：There is growing concern about sensory pollutants affecting ecological communities. Anthropogenically enhanced oxidants [ozone (O-3) and nitrate radicals (NO3)] rapidly degrade floral scents, potentially reducing pollinator attraction to flowers. However, the physiological and behavioral impacts on pollinators and plant fitness are unknown. Using a nocturnal flower-moth system, we found that atmospherically relevant concentrations of NO3 eliminate flower visitation by moths, and the reaction o...
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作者：[Anonymous]
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作者：Black, Amanda; Tylianakis, Jason M.
作者单位：Lincoln University - New Zealand; University of Canterbury
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作者：Isson, Terry; Rauzi, Sofia
摘要：Earth's persistent habitability since the Archean remains poorly understood. Using an oxygen isotope ensemble approach-comprising shale, iron oxide, carbonate, silica, and phosphate records-we reconcile a multibillion-year history of seawater delta O-18, temperature, and marine and terrestrial clay abundance. Our results reveal a rise in seawater delta O-18 and a temperate Proterozoic climate distinct to interpretations of a hot early Earth, indicating a strongly buffered climate system. Preca...
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作者：Jiang, Bin; Gao, Lei; Wang, Haijun; Sun, Yaping; Zhang, Xiaolin; Ke, Han; Liu, Shengchao; Ma, Pengchen; Liao, Qinggang; Wang, Yue; Wang, Huan; Liu, Yugeng; Du, Ran; Rogge, Torben; Li, Wei; Shang, Yi; Houk, K. N.; Xiong, Xingyao; Xie, Daoxin; Huang, Sanwen; Lei, Xiaoguang; Yan, Jianbin
作者单位：Guangdong Laboratory for Lingnan Modern Agriculture; Chinese Academy of Agricultural Sciences; Agriculture Genomes Institute at Shenzhen, CAAS; Peking University; South China Agricultural University; University of California System; University of California Los Angeles; Yunnan Normal University; Tsinghua University; Shenzhen Bay Laboratory
摘要：Paclitaxel is a well known anticancer compound. Its biosynthesis involves the formation of a highly functionalized diterpenoid core skeleton (baccatin III) and the subsequent assembly of a phenylisoserinoyl side chain. Despite intensive investigation for half a century, the complete biosynthetic pathway of baccatin III remains unknown. In this work, we identified a bifunctional cytochrome P450 enzyme [taxane oxetanase 1 (TOT1)] in Taxus mairei that catalyzes an oxidative rearrangement in pacli...
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作者：Wang, Hongxing; Ren, Jie; Zhou, Shiyun; Duan, Yaoyuan; Zhu, Chenqiao; Chen, Chuanwu; Liu, Ziyan; Zheng, Qingyou; Xiang, Shu; Xie, Zongzhou; Wang, Xia; Chai, Lijun; Ye, Junli; Xu, Qiang; Guo, Wenwu; Deng, Xiuxin; Zhang, Fei
作者单位：Huazhong Agricultural University; Hubei Hongshan Laboratory
摘要：Secretory structures in terrestrial plants serve as reservoirs for a variety of secondary metabolites. Among these, the secretory cavity of the Rutaceae family is notable for containing essential oils with a wide range of applications. However, the molecular basis underlying secretory cavity development is unknown. Here, we reveal a molecular framework for Citrus oil gland formation. Using genetic mapping and genome editing, we demonstrated that this process requires LATE MERISTEM IDENTITY1 (L...
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作者：Gupta, Isha
作者单位：University of Delhi
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作者：Liu, Yi; Wang, Yanyan; Willett, Sean D.; Zimmermann, Niklaus E.; Pellissier, Loic
作者单位：Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research; Swiss Federal Institutes of Technology Domain; ETH Zurich; Swiss Federal Institutes of Technology Domain; ETH Zurich
摘要：Madagascar exhibits high endemic biodiversity that has evolved with sustained and stable rates of speciation over the past several tens of millions of years. The topography of Madagascar is dominated by a mountainous continental rift escarpment, with the highest plant diversity and rarity found along the steep, eastern side of this geographic feature. Using a process-explicit model, we show that precipitation-driven erosion and landward retreat of this high-relief topography creates transient ...
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作者：Cornwall, Warren
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作者：Zhou, Xiaoyu; Wang, Zhuofan; Li, Shuai; Rong, Xianle; Bu, Jiexun; Liu, Qiang; Ouyang, Zheng
作者单位：Tsinghua University; Tsinghua University; Tsinghua University; Tsinghua Shenzhen International Graduate School
摘要：Conventional mass spectrometry does not distinguish between enantiomers, or mirror-image isomers. Here we report a technique to break the chiral symmetry and to differentiate enantiomers by inducing directional rotation of chiral gas-phase ions. Dual alternating current excitations were applied to manipulate the motions of trapped ions, including the rotation around the center of mass and macro movement around the center of the trap. Differences in collision cross section were induced, which c...
