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New insight into the origin and evolution of the flora and fauna of Hainan Island,China

Science China Earth Sciences 2025年第1期68卷 52-61页

作者： Hua ZHU Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesYunnan International Joint Laboratory of Southeast Asia Biodiversity ConservationYunnan Key Laboratory for the Conservation of Tropical Rainforests and Asian ElephantsMengla666303China

The origin of the biota of Hainan Island,China,remains a fundamental scientific *** studies on the biota,geological tectonics,and paleomagnetism proposed that during the Eocene,Hainan Island connected Vietnam and Guangxi,and then moved to the southeast to reach its present *** review mainly discusses its biota origin from molecular phylogeny and palaeobotanical *** formation and evolution of the biological groups of Hainan Island were identified via research on their genomes,phylogeny,and molecular *** research showed that the genera and species that appeared and diverged early in their evolution(i.e.,before the Miocene)can be explained by the land connection between Hainan Island,Vietnam,and Guangxi during the *** to Southeast Asian tectonic theory,in the Middle Miocene(at about 15 million years ago),Hainan Island had moved to its present *** population and genetic divergence of species with late divergence times(after 15 Ma)can be reasonably explained by the close proximity(or land connection)between Hainan Island and the Leizhou Peninsula,enabling genetic communication between Hainan Island and the Chinese mainland,but have exceptional *** have been obtained through palaeobotanical studies,showing that in the Eocene-Oligocene period,southwest China and Hainan Island had subtropical vegetation and ***,the fossil group in southeast China(in Maoming,near present-day Hainan Island)in the Late Eocene indicated a tropical rainforest vegetation and *** suggests that in the Paleogene,Hainan Island may have been located near or on the southwest border of Guangxi and northern Vietnam,rather than in its present *** floristic division of the flora of Hainan Island basically presents a northeast-southwest inclined distribution *** pattern can be explained by the counterclockwise rotation of Hainan Island during its movement to the southeast as prop

关键词： Molecular phylogeny Biogeography Paleobotany Origin of flora and fauna Hainan Island of China

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Neuroprotective and antidiabetic lanostane-type triterpenoids from the fruiting bodies of Ganoderma theaecolum

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Chinese Journal of Natural Medicines 2025年第2期23卷 245-256页

作者： Jiaocen Guo Li Yang Luting Dai Qingyun Ma Jiaoyang Yan Qingyi Xie Yougen Wu Haofu Dai Youxing Zhao School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication) Hainan University key laboratory of Research and Development of Natural Product from Li Folk Medicine of Hainan Province & National key laboratory for tropical Crop Breeding Institute of Tropical Bioscience and Biotechnology Chinese Academy of Tropical Agricultural Sciences

Eight previously undescribed lanostane triterpenoids,including five nortriterpenoids with 2 6carbons,ganothenoids A-E（1-5）,and three lanostanoids,ganothenoids F-H（6-8）,along with 24 known ones（9-32）,were isolated from the fruiting bodies of Ganodrma *** structures of the novel compounds were elucidated using comprehensive spectroscopic methods,including electronic circular dichroism（ECD） and nuclear magnetic resonance（NMR） *** 1-32 were assessed for their neuroprotective effects against H2O2-induced damage in human neuroblastoma SH-SY5Y cells,as well as their inhibitory activities against protein tyrosine phosphatase 1B（PTP1B） and α-*** 4demonstrated the most potent neuroprotective activity against H2O2-induced oxidative stress by suppressing G0/G1phase cell cycle arrest,reducing reactive oxygen species（ROS） levels,and inhibiting cell apoptosis through modulation of B-cell lymphoma 2 protein（Bcl-2） and Bcl-2 associated X-protein（Bax） protein *** 26,12,and 28 exhibited PTP1B inhibitory activities with IC50values ranging from 13.92 to 56.94 μmol·L-1,while compound12 alone displayed significant inhibitory effects on α-glucosidase with an IC50value of 43.56μmol·***,enzyme kinetic analyses and molecular docking simulations were conducted for compounds 26 and 12 with PTP1B and α-glucosidase,respectively.

关键词： Ganoderma theaecolum Lanostane nortriterpenoids Neuroprotective effects PTP1B α-Glucosidase

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MePHD1.2 affects the synthesis of cyanogenic glycosides by regulating transcription of MeCYP79D2 in cassava

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The Crop Journal 2025年第1期13卷 204-214页

作者： Mengtao Li Xiao Zhao Yajun Li Yuanchao Li Xiaoye Zhao Weitao Mai Luqman Khan Qibing Liang Qingchun Yin Wenquan Wang Jinping Liu Xin Chen Institute of tropical Agriculture and Forestry Hainan UniversityHaikou570228National Key Laboratory for Tropical Crop BreedingSanya 572025HainanChina Institute of tropical Bioscience and Biotechnology Chinese Academy of Tropical Agricultural SciencesHaikou 571101HainanChina College of Plant Science and Technology Huazhong Agricultural UniversityWuhan 430070HubeiChina state key laboratory for Conservation and Utilization of Subtropical Agro-bioresources/College of Life Science and Technology Guangxi UniversityNanning 530004GuangxiChina Haikou Branch of Hainan Food and Drug Inspection Institute Haikou 570311HainanChina Hainan Institute for Food Control Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market RegulationHaikou 570314HainanChina Sanya Research Institute Chinese Academy of Tropical Agricultural SciencesSanya 572025HainanChina

The high content of cyanogenic glycosides(CG)in cassava tubers affects food *** are involved in the plant growth and development and protect cassava leaves from herbivorous ***,the regulatory mechanism of CG biosynthesis remains poorly ***,yeast one-hybrid assays were performed using a mixed cDNA library of cassava tubers and leaves as prey and the promoter of MeCYP79D2 as ***79D2,a cytochrome P450 protein,is the rate-limiting enzyme for CG synthesis in *** this information,a candidate regulator of MeCYP79D2 was selected and identified as transcription factor ***1.2,located in the nucleus and exhibiting an inhibitory transcription activity directly bound to an AT-rich motif in the promoter of *** cassava,the transcriptional activity of MeCYP79D2 was considerably enhanced in mephd1.2 mutant lines leading to increased linamarin and lotaustralin *** of MePHD1.2 promoted the production of CGs in cassava and decreased transcription inhibition on MeCYP79D2,exposing a novel regulatory module governing biosynthesis of CGs.

关键词： Cyanogenic glycosides Cytochrome P450 Manihot esculenta MePHD1.2

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Genome-wide association analysis reveals regulatory genes for the metabolite synthesis of 2-acetyl-1-pyrroline in aromatic coconut(Cocos nucifera L.)

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Journal of Genetics and Genomics 2025年第2期52卷 179-188页

作者： Hao Ding Xiang Lv Guangzhen Zhou Xiaomei Liu Xiwei Sun Jing Li Amjad Iqbal Yaodong Yang Hainan key laboratory of tropical Oil Crops Biology/Coconut Research Institute Chinese Academy of Tropical Agricultural SciencesWenchangHainan 571339China Hainan Coconut International Joint Research Center WenchangHainan 571339China Ministry of Education key laboratory for Ecology of tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikouHainan 570228China Department of Food Science&Technology Abdul Wali Khan University Mardan23200Pakistan

Coconut(Cocos nucifera L.)is a key tropical economic tree valued for its fruit flavor,particularly 2-acetyl-1-pyrroline(2AP),a vital aroma *** enhance high-aromatic coconut breeding efforts,it is essential to deeply understand the hereditary factors governing the production of *** this study,a genome-wide association analysis identifies 32 loci that exhibit significant associations with 2AP content based on single nucleotide polymorphism(SNP)variations from 168 aromatic coconut germplasm *** analysis then pinpoints 22 candidate genes near significant loci involved in 2AP *** encoded by these genes are involved in amino acid metabolism,glycolysis,and secondary *** these,Asparagine synthetase coding gene ASN1,Gamma-glutamylcysteine synthetase coding gene GSH1,and UbiA prenyltransferase coding gene UBIA are enriched in the linkage region constructed by significant locus Chr04_*** particular,the SNP mutation of CnASN1 leads to amino acid changes in the functional region of the coding protein,potentially resulting in differences in 2AP content among haplotype *** variations in related candidate genes,particularly the gene CnASN1,provides molecular markers closely associated with 2AP synthesis for coconut breeding and offers further insights into the metabolic mechanisms of 2AP.

关键词： Aromatic coconut 2AP SNP Genome-wideassociation study(GWAS) Haplotype analysis

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The Enhancing Effect of the East Asian Subtropical Westerly Jet on Summer Extreme High-Temperature Events over Central-Eastern China Since the Late 1990s

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Advances in Atmospheric Sciences 2025年第3期42卷 453-466页

作者： Chujie GAO Yuyu NIU Gen LI Shanlei SUN Bo LU Chaofan LI Bei XU Jinglong HUANG Xiubao SUN College of oceanography&key laboratory of Marine Hazards Forecasting Ministry of Natural ResourcesHohai UniversityNanjing 210098China key laboratory of Meteorological Disaster Ministry of Education(KLME)&Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science and TechnologyNanjing 210044China state key laboratory of tropical oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China laboratory for Climate Studies and CMA-NJU Joint laboratory for Climate Prediction Studies National Climate CenterChina Meteorological AdministrationBeijing 100081China Xiong’an Institute of Meteorological Artificial Intellegence Xiong'an 071708China Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of the Chinese Academy of SciencesBeijing 100049China College of Intelligent Science and Control Engineering Jinling Institute of TechnologyNanjing 211169China

The increase in frequency and intensity of Extreme High-temperature Events(EHEs)over Central-Eastern China(CEC)in recent decades has severely impacted social development and *** observation and reanalysis datasets,this study explores the effect of the East Asian subtropical westerly jet stream(EAJ)on the CEC EHEs for the summers spanning 1979–*** its general relative location to the right side of the upper-level jet stream exit region,CEC would theoretically suffer more EHEs with a stronger and northwardly-shifted EAJ in summer due to the likelihood of abnormal subsidence induced by the ***,such an EAJ–EHE connection has been unstable over the past four decades but has displayed an evident interdecadal *** the late 1990s,the interannual variation of the EAJ was manifested mainly by its meridional displacement in the northeastern part of East Asia;thus,the atmospheric responses were essentially located to the east of CEC,exerting less of an influence on the CEC ***,since the late 1990s,the EAJ variation has featured an intensity change in its center over the northwest portion of the CEC,which has resulted in a westward shift in atmospheric responses to cover the CEC ***,the EAJ could potentially affect the summer CEC EHEs during 2000–*** findings offer support for an in-depth understanding of the formation mechanisms of extreme weather/climate events of this nature and thus provide a scientific reference for seasonal climate predictions.

关键词： summer extreme high-temperature events East Asian subtropical jet atmospheric circulation central-eastern China interdecadal change

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Mechanism study of the molluscicide candidate PBQ on Pomacea canaliculata using a viscosity-sensitive fluorescent probe

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Chinese Chemical Letters 2025年第1期36卷 447-452页

作者： Lanyun Zhang Weisi Wang Yu-Qiang Zhao Rui Huang Yuxun Lu Ying Chen Liping Duan Ying Zhou Yunnan Characteristic Plant Extraction laboratory College of Chemical Science and TechnologyYunnan UniversityKunming 650091China National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionChinese Center for Tropical Diseases ResearchWHO Centre for Tropical DiseasesNational Key Laboratory of Inteligent Tracking and Forecasting for Infectious DiseasesKey Laboratory on Parasite and Vector Biology MinistryofHealthShanghai200025China

PBQ[1-(4-chlorophenyl)-3-(pyridin-3-yl)urea],an enormous potent molluscicide,showed excellent Pomacea canaliculata(***)control activity and low toxicity for other aquatic organisms,but its snail-killing mechanisms are still not fully *** employed an optical method to elucidate PBQ action via a novel fluorescent viscosity probe,*** the viscosity in the test solutions increased,compared with that in pure ethanol,a 54-fold fluorescence intensity enhancement of NCV was observed in 310 cP of 90%***,NCV successfully exhibited a selective fluorescence response towards monensin-induced cellular viscosity changes in HepG2 *** liver,stomach,and foot plantar of the tested snails were frozen and sectioned for fluorescent imaging experiments after the treatment with different PBQ concentrations over various times.A significant fluorescent increase in the snail's liver was observed upon exposure to 0.75 mg/L PBQ for 72 h,which highlighted an increase in *** and eosin(HE)staining further supported PBQ-induced liver damage with a viscosity increase in *** study provides a new rapid optical visualization method to study the killing mechanisms of PBQ and may help discover new chemicals that control snail populations.

关键词： Fluorescence sensor Viscosity Pomacea canaliculata Molluscicide mechanisms Bio-imaging

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Exploring economic viable species via assessing a tropic-specific microalgal collection

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Journal of Oceanology and Limnology 2025年第1期43卷 210-218页

作者： Chen MA Ni WANG Yi XIN Qinhua GAN Wenxu ZHOU Yandu LU state key laboratory of Marine Resource Utilization in South China Sea School of Marine Biology and FisheriesHainan UniversityHaikou 570228China Hainan Engineering&Research Center of Marine Bioactives and Bioproducts Haikou 570228China Haikou Innovation Platform for Research&Utilization of Algal Bioresource Hainan UniversityHaikou 570228China Hainan Provincial key laboratory of tropical Hydrobiotechnology Hainan UniversityHaikou 570228China

Locations around the equator provide unique habitats for microalgae presumably with exceptional *** develop microalga-derived product systems,we previously created a(sub)tropical microalgal *** this study,two Chlorella strains(MEM176 and MEM193),adaptive to typical tropical climate,were isolated from the *** production performance was evaluated where both strains showed a robust growth in high temperatures and light ***,the strains MEM176 and MEM193 produced 503.6-mg/(L·d)and 411.3-mg/(L·d)biomass,respectively,with high contents of *** commercial and nutritional values were emphasized by amino acid compositions(e.g.,proline,valine,and phenylalanine).Particularly,higher amounts of proline were revealed in MEM176(47.9 mg/g dry biomass(DW))and MEM193(47.9 and 59.2 mg/g DW)than available commercial *** with MEM193,MEM176 produced 129.7%more lipids in which unsaturated fatty acids(particularly linoleic acid andα-linolenic acid)account for 65%of the total ***,it is promising to explore the potential of these Chlorella strains as food additives via outdoor cultivation in tropical area,notably MEM176 that exhibits superiority as sources of essential amino acids and valuable fatty acids.

关键词： Chlorella tropical species food additive microalga

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Subgenome asymmetry of gibberellins-related genes plays important roles in regulating rapid growth of bamboos

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Plant Diversity 2025年第1期47卷 68-81页

作者： Ling Mao Cen Guo Liang-Zhong Niu Yu-Jiao Wang Guihua Jin Yi-Zhou Yang Ke-Cheng Qian Yang Yang Xuemei Zhang Peng-Fei Ma De-Zhu Li Zhen-Hua Guo Germplasm Bank of Wild Species&Yunnan key laboratory of Crop Wild Relatives Omics Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of Chinese Academy of Sciences Beijing 100049China state key laboratory of Plant Diversity and Specialty Crops Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China Center for Integrative Conservation&Yunnan key laboratory for the Conservation of tropical Rainforests and Asian Elephants Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMenglaYunnan 666303China Yunnan key laboratory of Dai and Yi Medicines Yunnan University of Chinese MedicineKunmingYunnan 650500China

Rapid growth is an innovative trait of woody bamboos that has been widely ***,the genetic basis and evolution of this trait are poorly *** advantage of genomic resources of 11 representative bamboos at different ploidal levels,we integrated morphological,physiological,and transcriptomic datasets to investigate rapid *** particular,these bamboos include two large-sized and a small-sized woody species,compared with a diploid herbaceous *** results showed that gibberellin A1 was important for the rapid shoot growth of the world's largest bamboo,Dendrocalamus sinicus,and indicated that two gibberellins(GAs)-related genes,KAO and SLRL1,were key to the rapid shoot growth and culm size in woody *** expression of GAs-related genes exhibited significant subgenome asymmetry with subgenomes A and C demonstrating expression dominance in the large-sized woody bamboos while the generally submissive subgenomes B and D dominating in the small-sized *** subgenome asymmetry was found to be correlated with the subgenome-specific gene structure,particularly UTRs and core *** study provides novel insights into the molecular mechanism and evolution of rapid shoot growth following allopolyploidization in woody bamboos,particularly via subgenome *** findings are helpful for understanding of how polyploidization in general and subgenome asymmetry in particular contributed to the origin of innovative traits in plants.

关键词： Allopolyploids GAs DEGs Culm sizes Rapid shoot growth Woody bamboos

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Canopy structural heterogeneity drives α and β species-genetic diversity correlations in a Chinese subtropical forest

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Plant Diversity 2025年第1期47卷 106-114页

作者： Zhiliang Yao Xia Pan Xin Yang Xiaona Shao Bin Wang Yun Deng Zhiming Zhang Qiaoming Li Luxiang Lin CAS key laboratory of tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesKunming 650223YunnanChina University of Chinese Academy of Sciences Beijing 100049China School of Ecology and Environment Hainan UniversityHaikou 570228HainanChina state Forestry and Grassland Administration key laboratory of Silviculture in Downstream Areas of the Yellow River Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland AdministrationForestry College of Shandong Agricultural UniversityTai'an 271018ShandongChina School of Ecology and Environmental Sciences&Yunnan key laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments Yunnan UniversityKunming 650500YunnanChina National Forest Ecosystem Research Station at Xishuangbanna Mengla 666303YunnanChina

Patterns and drivers of species–genetic diversity correlations(SGDCs)have been broadly examined across taxa and ecosystems and greatly deepen our understanding of how biodiversity is ***,few studies have examined the role of canopy structural heterogeneity,which is a defining feature of forests,in shaping ***,we determine what factors contribute toα-andβ-species–genetic diversity correlations(i.e.,α-andβ-SGDCs)in a Chinese subtropical *** this purpose,we used neutral molecular markers to assess genetic variation in almost all adult individuals of the dominant tree species,Lithocarpus xylocarpus,across plots in the Ailaoshan National Natural *** also quantified microhabitat variation by quantifying canopy structure heterogeneity with airborne laser scanning on 201-ha subtropical forest *** found that speciesα-diversity was negatively correlated with geneticα-*** structural heterogeneity was positively correlated with speciesα-diversity but negatively correlated with geneticα-*** contrasting effects contributed to the formation of a negativeα-***,we found that canopy structural heterogeneity increases speciesα-diversity and decreases geneticα-diversity by reducing the population size of target ***β-diversity,in contrast,was positively correlated with geneticβ-*** in canopy structural heterogeneity between plots had non-linear parallel effects on the two levels ofβ-diversity,while geographic distance had a relatively weak effect onβ-*** study indicates that canopy structural heterogeneity simultaneously affects plot-level community species diversity and population genetic diversity,and species and genetic turnover across plots,thus drivingα-andβ-SGDCs.

关键词： Dominant species Forest structure LiDAR Lithocarpus xylocarpus Speciesegenetic diversity correlation Subtropical evergreen broad-leaved forest

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Rising frequency of ozone-favorable synoptic weather patterns contributes to 2015-2022 ozone increase in Guangzhou

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Journal of Environmental Sciences 2025年第2期148卷 502-514页

作者： Nanxi Liu Guowen He Haolin Wang Cheng He Haofan Wang Chenxi Liu Yiming Wang Haichao Wang Lei Li Xiao Lu Shaojia Fan School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary Key Laboratory of Tropical Atmosphere-Ocean System(Sun Yat-sen University)Ministry of EducationZhuhai 519082China

Objective weather classification methods have been extensively applied to identify dominant ozone-favorable synoptic weather patterns(SWPs),however,the consistency of different classification methods is rarely *** this study,we apply two widely-used objective methods,the self-organizing map(SOM)and K-means clustering analysis,to derive ozone-favorable SWPs at four Chinese megacities in *** find that the two algorithms are largely consistent in recognizing dominant ozone-favorable SWPs for four Chinese *** the case of classifying six SWPs,the derived circulation fields are highly similar with a spatial correlation of 0.99 between the two methods,and the difference in themean frequency of each SWP is less than 7%.The six dominant ozone-favorable SWPs in Guangzhou are all characterized by anomaly higher radiation and temperature,lower cloud cover,relative humidity,and wind speed,and stronger subsidence compared to climatology *** find that during 2015-2022,the occurrence of ozone-favorable SWPs days increases significantly at a rate of 3.2 days/year,faster than the increases in the ozone exceedance days(3.0 days/year).The interannual variability between the occurrence of ozone-favorable SWPs and ozone exceedance days are generally consistent with a temporal correlation coefficient of *** particular,the significant increase in ozone-favorable SWPs in 2022,especially the Subtropical High type which typically occurs in September,is consistent with a long-lasting ozone pollution episode in Guangzhou during September *** results thus reveal that enhanced frequency of ozone-favorable SWPs plays an important role in the observed 2015-2022 ozone increase in Guangzhou.

关键词： Ozone(O3) Objective weather classification methods Synoptic weather patterns Trends Guangzhou

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