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The protein-protein interaction landscape of transcription factors during gynoecium development in Arabidopsis

Molecular Plant 2023年第1期16卷 260-278页

作者： Humberto Herrera-Ubaldo Sergio E.Campos Pablo López-Gómez Valentín Luna-García Víctor M.Zúñiga-Mayo Gerardo E.Armas-Caballero Karla L.González-Aguilera Alexander DeLuna Nayelli Marsch-Martínez Carlos Espinosa-Soto Stefan de Folter Unidad de Genómica Avanzada(UGA-LANGEBIO) Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional(CINVESTAV-IPN)IrapuatoGuanajuato 36824México Departamento de Biotecnología y Bioquímica Unidad IrapuatoCINVESTAV-IPNIrapuatoGuanajuato 36824México Instituto de Física Universidad de San Luis PotosíSan Luis PotosíSLP 78290México present address:Department of Plant Sciences University of CambridgeCambridgeUK present address:Department of Molecular and Cellular Biology University of California DavisDavisCAUSA present address:CONACYT Instituto de FitosanidadColegio de PostgraduadosCampus MontecilloTexcocoMéxico

Flowers are composed of organs whose identity is defined by the combinatorial activity of transcription factors(TFs).The interactions between MADS-box TFs and protein complex formation have been schematized in the floral quartet model of flower development.The gynoecium is the flower’s female reproductive part,crucial for fruit and seed production and,hence,for reproductive success.After the establishment of carpel identity,many tissues arise to form a mature gynoecium.TFs have been described as regulators of gynoecium development,and some interactions and complexes have been identified.However,broad knowledge about the interactions among these TFs and their participation during development remains scarce.In this study,we used a systems biology approach to understand the formation of a complex reproductive unit—as the gynoecium—by mapping binary interactions between well-characterized TFs.We analyzed almost 4500 combinations and detected more than 250 protein-protein interactions(PPIs),resulting in a process-specific interaction map.Topological analyses suggest hidden functions and novel roles for many TFs.In addition,we observed a close relationship between TFs involved in auxin and cytokinin-signaling pathways and other TFs.Furthermore,we analyzed the network by combining PPI data,expression,and genetic data,which helped us to dissect it into several dynamic spatio-temporal subnetworks related to gynoecium development processes.Finally,we generated an extended PPI network that predicts new players in gynoecium development.Taken together,all these results serve as a valuable resource for the plant community.

关键词： interactome networks transcription factors gynoecium development

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Three New Species of Diploderma Hallowell, 1861 (Reptilia: Squamata: Agamidae) from the Shaluli Mountains in Western Sichuan, China

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Asian Herpetological Research 2022年第4期13卷 205-223页

作者： Bo CAI Meihua ZHANG Jing LI Simeng DU Feng XIE Mian HOU Huaming ZHOU Jianping JIANG CAS Key Laboratory of Mountain ecological Restoration and Bioresource Utilization Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu 610041SichuanChina Ganzi Institute of Forestry Research Kangding 626001SichuanChina College of Continuing(Online)Education Sichuan Normal UniversityChengdu 610068SichuanChina University of the Chinese Academy of Sciences Beijing 100049China Mangkang Biodiversity and ecological Station Tibet Ecological Safety Monitor NetworkChangdu 854500TibetChina

In recent years,taxonomic research of the genus Diploderma has made great progress,but there are still areas lacking relevant investigations.During 2020-2021,we carried out survey of reptile diversity in and around the Shaluli Mountains and collected some specimens of Diploderma.Of which,based on systematics inferred from mitochondrial ND2 gene sequence and morphological data,three new species were recognized:Diploderma daochengense sp.***.from the Shuiluo River and Muli River valleys in southeastern Daocheng County,D.xinlongense sp.***.from the upper-middle valleys of the Yalong River in Xinlong County,and D.kangdingense sp.***.from the Yalong River middle valley and Liqiu River valley.Specifically,these three new species formed three monophyletic lineages with strongly supported and nested into the subclade I of the Bayesian and Maximum Likelihood trees.The uncorrected mean genetic distance between these new species and their closely related species was 4.3%(D.xinlongense sp.***.vs.D.panchi),3.4%(D.daochengense sp.***.vs.D.yulongense)and 5.5%(D.kangdingense sp.***.vs.D.bowoense),higher than many pairs of species of Diploderma.With respect to the morphology,D.daochengense sp.***.can be easily diagnosed from D.yulongense byhaving smoothupper edge of the dorsolateral stripes,cyan or dark olive green to yellow gular spots inbothsexes and light yelloworwhite ventrolateral body in males;D.xinlongense sp.***.can be easily diagnosed from D.panchi by having cyan gular spot in both sexes;D.kangdingense sp.***.can be easily diagnosed from D.bowoense by having more T4S 20-25(average 23),more F4S 16-20(average 17)and yellow to light yellow ventrolateral body,yellow gular spot present in males.To date,the number of species of the genus Diploderma has increased to 40,of which 37 species have been known in China.

关键词： Ganzi taxonomy Hengduan Mountains Mountain Dragons RGBcolormodel

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Interplay between ABA and GA Modulates the Timing of Asymmetric Cell Divisions in the Arabidopsis Root Ground Tissue

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Molecular Plant 2016年第6期9卷 870-884页

作者： Shin Ae Lee Sejeong Jang Eun Kyung Yoon Jung-Ok Heo Kwang Suk Chang Ji Won Choi Souvik Dhar Gyuree Kim Jeong-Eun Choe Jae Bok Heo Chian Kwon Jae-Heung Ko Yong-Sic Hwang Jun Lim Department of Systems Biotechnology Konkuk University Seour 05029 Korea Department of Molecular Biotechnology Dong-A University Busan 49201 Korea Department of Molecular Biology Dankook University Yongin 16890 Korea Department of Plant and Environmental New Resources Kyung Hee University Yongin 17104 Korea These authors contributed equally to this article. present address: The Sainsbury Laboratory University of Cambridge Cambridge CB2 1LR United Kingdom present address: Department of Life Science Research Institute for Natural Sciences Hanyang University Seoul 04763 Korea

In multicellular organisms, controlling the timing and extent of asymmetric cell divisions （ACDs） is crucial for correct patterning. During post-embryonic root development in Arabidopsis thaliana, ground tissue （GT） maturation involves an additional ACD of the endodermis, which generates two different tissues： the endo- dermis （inner） and the middle cortex （outer）. It has been reported that the abscisic acid （ABA） and gibberellin （GA） pathways are involved in middle cortex （MC） formation. However, the molecular mechanisms under- lying the interaction between ABA and GA during GT maturation remain largely unknown. Through transcriptome analyses, we identified a previously uncharacterized C2H2-type zinc finger gene, whose expression is regulated by GA and ABA, thus named GAZ （GA- AND ABA-RESPONSIVE ZINC FINGER）. Seedlings ectopically overexpressing GAZ （GAZ-OX） were sensitive to ABA and GA during MC formation, whereas GAZ-SRDX and RNAi seedlings displayed opposite phenotypes. In addition, our results indicated that GAZ was involved in the transcriptional regulation of ABA and GA homeostasis. In agreement with pre- vious studies that ABA and GA coordinate to control the timing of MC formation, we also confirmed the unique interplay between ABA and GA and identified factors and regulatory networks bridging the two hor- mone pathways during GT maturation of the Arabidopsis root.

关键词： ABA GA GRAS ground tissue root development transcription factor

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Amphibian Species Contribute Similarly to Taxonomic, but not Functional and Phylogenetic Diversity: Inferences from Amphibian Biodiversity on Emei Mountain

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Asian Herpetological Research 2018年第2期9卷 110-118页

作者： Tian ZHAO Bin WANG Guocheng SHU Cheng LI Jianping JIANG CAS Key Laboratory of Mountain ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences

Understanding the relationships between species, communities, and biodiversity are important challenges in conservation ecology. Current biodiversity conservation activities usually focus on species that are rare, endemic, distinctive, or at risk of extinction. However, empirical studies of whether such species contribute more to aspects of biodiversity than common species are still relatively rare. The aim of the present study was to assess the contribution of individual amphibian species to different facets of biodiversity, and to test whether species of conservation interest contribute more to taxonomic, functional, and phylogenetic diversity than do species without special conservation status. To answer these questions, 19 000 simulated random communities with a gradient of species richness were created by shuffling the regional pool of species inhabiting Emei Mountain. Differences of diversity values were then computed before and after removing individual species in these random communities. Our results indicated that although individual species contributed similarly to taxonomic diversity, their contribution to functional and phylogenetic diversity was more idiosyncratic. This was primarily driven by the diverse functional attributes of species and the differences in phylogenetic relationships among species. Additionally, species of conservation interest did not show a significantly higher contribution to any facet of biodiversity. Our results support the claims that the usefulness of metrics based only on species richness is limited. Instead, assemblages that include species with functional and phylogenetic diversity should be protected to maintain biodiversity.

关键词： amphibians conservation taxonomic diversity functional diversity phylogenetic diversity

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A Light-Independent Allele of Phytochrome B Faithfully Recapitulates Photomorphogenic Transcriptional networks

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Molecular Plant 2009年第1期2卷 166-182页

作者： Wei Hu Yi-Shin Su J. Clark Lagarias Department of Molecular and Cellular Biology College of Biological Sciences University of California Davis CA 95616 USA present address: Carnegie Institution of Washington -Department of Plant Biology Stanford CA 94305 USA

Dominant gain-of-function alleles of Arabidopsis phytochrome B were recently shown to confer lightindependent, constitutive photomorphogenic （cop） phenotypes to transgenic plants （Su and Lagarias, 2007）. In the present study, comparative transcription profiling experiments were performed to assess whether the pattern of gene expression regulated by these alleles accurately reflects the process of photomorphogenesis in wild-type Arabidopsis. Whole- genome transcription profiles of dark-grown phyAphyB seedlings expressing the Y^276H mutant of phyB （YHB） revealed that YHB reprograms about 13% of the Arabidopsis transcriptome in a light-independent manner. The YHB-regulated transcriptome proved qualitatively similar to but quantitatively greater than those of wild-type seedlings grown under 15 or 50 μmol m^-2 m^-1 continuous red light （Rc）. Among the 2977 genes statistically significant two-fold （SSTF） regulated by YHB in the absence of light include those encoding components of the photosynthetic apparatus, tetrapyrrole/pigment biosynthetic pathways, and early light-responsive signaling factors. Approximately 80% of genes SSTF regulated by Rc were also YHB-regulated. Expression of a notable subset of 346 YHB-regulated genes proved to be strongly attenuated by Rc, indicating compensating regulation by phyC-E and/or other Rc-dependent processes. Since the majority of these 346 genes are regulated by the circadian clock, these results suggest that phyA- and phyB-independent light signaling pathway（s） strongly influence clock output. Together with the unique plastid morphology of dark-grown YHB seedlings, these analyses indicate that the YHB mutant induces constitutive photomorphogenesis via faithful reconstruction of phyB signaling pathways in a light-independent fashion.

关键词： light signaling signal transduction transcriptome analysis photomorphogenesis Arabidopsis phytochrome.

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National Forest Inventories capture the multifunctionality of managed forests in Germany

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Forest Ecosystems 2021年第1期8卷 50-68页

作者： Nadja K.Simons María R.Felipe-Lucia Peter Schall Christian Ammer Jürgen Bauhus Nico Blüthgen Steffen Boch François Buscot Markus Fischer Kezia Goldmann Martin M.Gossner Falk Hänsel Kirsten Jung Peter Manning Thomas Nauss Yvonne Oelmann Rodica Pena Andrea Polle Swen C.Renner Michael Schloter Ingo Schöning Ernst-Detlef Schulze Emily F.Solly Elisabeth Sorkau Barbara Stempfhuber Tesfaye Wubet Jörg Müller Sebastian Seibold Wolfgang W.Weisser Terrestrial Ecology Research Group Technische Universität MünchenHans-Carl-von-Carlowitz-Platz 285354 FreisingGermany Present address:Ecological Networks Technische Universität DarmstadtSchnittspahnstraße 364287 DarmstadtGermany Helmholtz Centre for Environmental Research-UFZ Department of Ecosystem ServicesDeutscher Platz 5e04103 LeipzigGermany present address:German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5e04103 LeipzigGermany Silviculture and Forest Ecology of the Temperate Zones University of GöttingenBüsgenweg 137077 GöttingenGermany Centre for Biodiversity and Sustainable Land-use University of GöttingenBüsgenweg 137073 GöttingenGermany Chair of Silviculture Faculty of Environment and Natural ResourcesUniversity of FreiburgTennenbacherstr.479106 FreiburgGermany ecological networks Technische Universität DarmstadtSchnittspahnstraße 364287 DarmstadtGermany Institute of Plant Sciences University of BernAltenbergrain 213013 BernSwitzerland Biodiversity and Conservation Biology WSL Swiss Federal Research InstituteZürcherstrasse 1118903 BirmensdorfSwitzerland Helmholtz Centre for Environmental Research-UFZ Department of Soil EcologyTheodor-Lieser-Straße 406120 Halle(Saale)Germany German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5e04103 LeipzigGermany Forest Entomology WSL Swiss Federal Research InstituteZürcherstrasse 1118903 BirmensdorfSwitzerland Department of Environmental Systems Science Institute of Terrestrial EcosystemsETH ZürichUniversitätstr 168092 ZürichSwitzerland Environmental Informatics University of MarburgDeutschhausstraße 1235032 MarburgGermany Evolutionary Ecology and Conservation Genomics Ulm UniversityAlbert-Einstein-Allee 1189069 UlmGermany Senckenberg Biodiversity and Climate Research Centre Senckenberganlage 2560325 Frankfurt am MainGermany Geoecology University of TübingenRümelinstraße 19-2372070 TübingenGermany present address:Department of Sustaina

Background:Forests perform various important ecosystem functions that contribute to ecosystem services.In many parts of the world,forest management has shifted from a focus on timber production to multi-purpose forestry,combining timber production with the supply of other forest ecosystem services.However,it is unclear which forest types provide which ecosystem services and to what extent forests primarily managed for timber already supply multiple ecosystem services.Based on a comprehensive dataset collected across 150 forest plots in three regions differing in management intensity and species composition,we develop models to predict the potential supply of 13 ecosystem services.We use those models to assess the level of multifunctionality of managed forests at the national level using national forest inventory data.Results:Looking at the potential supply of ecosystem services,we found trade-offs(e.***.between both bark beetle control or dung decomposition and both productivity or soil carbon stocks)as well as synergies(e.***.for temperature regulation,carbon storage and culturally interesting plants)across the 53 most dominant forest types in Germany.No single forest type provided all ecosystem services equally.Some ecosystem services showed comparable levels across forest types(e.***.decomposition or richness of saprotrophs),while others varied strongly,depending on forest structural attributes(e.***.phosphorous availability or cover of edible plants)or tree species composition(e.***.potential nitrification activity).Variability in potential supply of ecosystem services was only to a lesser extent driven by environmental conditions.However,the geographic variation in ecosystem function supply across Germany was closely linked with the distribution of main tree species.Conclusions:Our results show that forest multifunctionality is limited to subsets of ecosystem services.The importance of tree species composition highlights that a lack of multifunctionality at the stand level can be compensated by managing forests at the

关键词： Ecosystem processes and services Forest management Structural diversity Tree species composition Trade-offs and synergies Forest productivity

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A Study of Ensemble Feature Selection and Adversarial Training for Malicious User Detection

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中国通信:英文版 2023年第10期20卷 212-229页

作者： Linjie Zhang Xiaoyan Zhu Jianfeng Ma State Key Laboratory of Integrated Services networks Xidian UniversityXi’an 710071China

The continuously booming of information technology has shed light on developing a variety of communication networks,multimedia,social networks and Internet of Things applications.However,users inevitably suffer from the intrusion of malicious users.Some studies focus on static characteristics of malicious users,which is easy to be bypassed by camouflaged malicious users.In this paper,we present a malicious user detection method based on ensemble feature selection and adversarial training.Firstly,the feature selection alleviates the dimension disaster problem and achieves more accurate classification performance.Secondly,we embed features into the multidimensional space and aggregate it into a feature map to encode the explicit content preference and implicit interaction preference.Thirdly,we use an effective ensemble learning which could avoid over-fitting and has good noise resistance.Finally,we propose a datadriven neural network detection model with the regularization technique adversarial training to deeply analyze the characteristics.It simplifies the parameters,obtaining more robust interaction features and pattern features.We demonstrate the effectiveness of our approach with numerical simulation results for malicious user detection,where the robustness issues are notable concerns.

关键词： malicious user detection feature selection ensemble learning adversarial training

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nitiation of ER Body Formation and Indole Glucosinolate Metabolism by the Plastidia Retrograde Signaling Metabolite, MEcPP

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Molecular Plant 2017年第11期10卷 1400-1416页

作者： Jin-Zheng Wang Baohua Li Yanmei Xiao Yu Ni Haiyan Ke Panyu Yang Amancio de Souza Marta Bjornson Xiang He Zhouxin Shen Gerd Ulrich Balcke Steve P. Briggs Alain Tissier Daniel J. Kliebenstein Katayoon Dehesh Institute for Integrative Genome Biology and Department of Botany and Plant Sciences University of California Riverside CA 92521 USA Department of Plant Biology University of California Davis CA 95616 USA Department of Plant Sciences University of California Davis CA 95616 USA Division of Biological Sciences University of California San Diego La Jolla CA 92093 USA Department of Cell and Metabolic Biology Leibniz-lnstitute of Plant Biochemistry Halle Germany present address: College of Agronomy and Biotechnology Southwest University Chongqing P.R. China present address: Rice Research Institute Sichuan Agricultural University Changdu Sichuan 611130 China

Plants have evolved tightly regulated signaling networks to respond and adapt to environmental perturbations, but the nature of the signaling hub（s） involved have remained an enigma. We have previously established that methylerythritol cyclodiphosphate （MEcPP）, a precursor of plastidial isoprenoids and a stress- specific retrograde signaling metabolite, enables cellular readjustments for high-order adaptive functions. Here, we specifically show that MEcPP promotes two Brassicaceae-specific traits, namely endoplasmic reticulum （ER） body formation and induction of indole glucosinolate （IGs） metabolism selectively, via tran- scriptional regulation of key regulators NAIl for ER body formation and MYB51/122 for IGs biosynthesis）. The specificity of MEcPP is further confirmed by the lack of induction of wound-inducible ER body genes as well as IGs by other altered methylerythritol phosphate pathway enzymes. Genetic analyses revealed MEcPP-mediated COil-dependent induction of these traits. Moreover, MEcPP signaling integrates the biosynthesis and hydrolysis of IGs through induction of nitrile-specifier protein1 and reduction of the sup- pressor, ESM1, and production of simple nitriles as the bioactive end product. The findings position the plastidial metabolite, MEcPP, as the initiation hub, transducing signals to adjust the activity of hard- wired gene circuitry to expand phytochemical diversity and alter the associated subcellular structure required for functionality of the secondary metabolites, thereby tailoring plant stress responses.

关键词： glucosinolates ER body retrograde signaling MEP pathway MEcPP stress

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A New Species of the Genus Hebius Thompson,1913(Serpentes:Natricidae)from Yunnan,China

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亚洲两栖爬行动物研究:英文版 2023年第3期14卷 212-226页

作者： Shun MA Shengchao SHI Budian AYI Jianping JIANG Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041SichuanChina University of Chinese Academy of Sciences Beijing 100049China College of Life Sciences Sichuan UniversityChengdu 610065SichuanChina Mangkang Biodiversity and ecological Station Tibet Ecological Safety Monitor NetworkChangdu 854500TibetChina

A new keelback snake of the genus Hebius,H.jingdongensis sp.nov.,is reported from Jingdong in Yunnan,China based on a combination of molecular and morphological evidence.Although closest to H.khasiensis and H.boulengeri phylogenetically,this new species is genetically distinct amongst congeners with the mitochondrial Cyt b uncorrected p-distance ranging from 9.5%(vs.H.octolineatus)to 14.8%(vs.H.andreae).In addition,this new species can be distinguished from its congeners by a combination of the following morphological characters:(1)body cylindrical,tail relatively short,TaL/TL 0.235–0.243;(2)dorsal scale rows 19-19-17;(3)ventrals 163–166,cloacal plate divided,subcaudals 71–74 pairs;(4)supralabials 8,the first two contact with the nasals;(5)infralabials 9 or 10,preocular 1,postoculars 3;(6)body dorsum sandy beige with the sides yellowish-brown decorated with two brick-red stripes on the dorsolateral scale rows in life;(7)sutures between the labials brick-red in life and taupe in preservative;(8)ventral light yellow with the outer part of each scale brick-red in life;(9)ventrolateral stripes present.

关键词： Hebius jingdongensis sp.nov. molecular phylogeny morphology taxonomy Yunnan province

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6G Service Coverage with Mega Satellite Constellations

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China Communications 2022年第1期19卷 64-76页

作者： Min Sheng Di Zhou Weigang Bai Junyu Liu Jiandong Li State Key Laboratory of Integrated Service networks Xidian UniversityXi’anShaanxi710071China

The rapid development and continuous updating of the mega satellite constellation(MSC)have brought new visions for the future 6G coverage extension, where the global seamless signal coverage can realize ubiquitous services for user terminals. However, global traffic demands present nonuniform characteristics. Therefore, how to ensure the on-demand service coverage for the specific traffic demand, i.e., the ratio of traffic density to service requirement per unit area, is the core issue of 6G wireless coverage extension exploiting the MSC. To this regard, this paper first discusses the open challenges to reveal the future direction of 6G wireless coverage extension from the perspective of key factors affecting service coverage performance, i.e., the network access capacity, space segment capacity and their matchingrelationship. Furthermore, we elaborate on the key factors affecting effective matchings of the aforementioned aspects, thereby improving service coverage capability.

关键词： 6G mega satellite constellations on-demand service coverage un-uniform traffic demands resource management

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