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Photoperiod Mediates the Effects of Temperature and Light Intensity on the Proliferation of Ulva prolifera

Journal of Ocean University of China 2024年第1期23卷 255-263页

作者： JIANG Jianan YU Yanyan CHEN Yili LI Yahe XU Nianjun key laboratory of marine biotechnology of zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China

In order to study the complex effects of photoperiod,temperature,and light intensity on the spore maturation and release number of Ulva prolifera,we cultured thalli segment(2–3 mm)under three different photoperiods(L:D=12:12,14:10 and 10:14),temperature(15℃(LT),25℃(MT)and 30℃(HT))and light intensity(100,200 and 400μmol m^(−2)s^(−1),noted as LL,ML and HL,respectively)*** the maturation time,spore release number and chlorophyll fluorescence were *** results suggested that:1)The spore maturation time was accelerated by higher temperature or higher light intensity from 62 h to 36 h,and changes in day length accelerated the spore maturation to a certain extent as compared with 12:12 light/dark cycle;2)Higher light intensity significantly decreased the chlorophyll fluorescence(Fv′/Fm′,NPQ,rETRmax andα)of the mature reproductive segment under 30℃with 12:12 light/dark *** when in the other photoperiods(10:14 and 14:10 conditions),the inhibitory effects of high light intensity were alleviated significantly;3)The optimum condition for the spore maturation and release was 12:12 light/dark cycle,25℃,400μmol m^(−2)s^(−1),with both shorter and longer photoperiod reducing the spore release number;4)Higher light intensity significantly increased the spore release number under 25℃,but these effects were alleviated by 30℃*** study is the first attempt to elucidate the coincidence effects of photoperiod,temperature and light intensity on the reproduction of Ulva,which would help to reveal the mechanism of the rapid proliferation of green tide.

关键词： light intensity maturation photoperiod reproduction temperature Ulva prolifera

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Characterization,expression dynamics,and potential function of OPA1 for regulation of mitochondrial morphology during spermiogenesis in Phascolosoma esculenta

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Journal of Oceanology and Limnology 2024年第1期42卷 187-200页

作者： Xinming GAO Binbin FENG Chen DU Congcong HOU Shan JIN Daojun TANG Junquan ZHU key laboratory of Applied marine biotechnology by the Ministry of Education and key laboratory of marine biotechnology of zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China College of Ecology Lishui UniversityLishui 323000China

Mitochondria undergo morphological changes during spermatogenesis in some *** mechanism and role of mitochondrial morphology regulation,however,remain somewhat *** this study,we analyzed the molecular characteristics,expression dynamics and subcellular localization of optic atrophy protein 1(OPA1),a mitochondrial fusion and cristae maintenance-related protein,to reveal the possible regulatory mechanisms underlying mitochondrial morphology in Phascolosoma esculenta *** full-length cDNA of the *** opa1 gene(Pe-opa1)is 3743 bp in length and encodes 975 amino *** Pe-OPA1 protein is highly conservative and includes a transmembrane domain,a GTPase domain,two helical bundle domains,and a lipid-interacting *** and protein expression was higher in the coelomic fluid(a site of spermatid development)of male *** and increased first and then decreased from March to ***,their expression during the breeding stage was significantly higher than during the non-breeding stage,suggesting that Pe-OPA1 is involved in *** *** Pe-OPA1 protein was more abundant in components consisting of many spermatids than in components without,indicating that Pe-OPA1 mainly plays a role in the spermatid in coelomic ***,Pe-OPA1 was mainly detected in the spermatid *** experiments showed that the Pe-OPA1 are constitutively expressed and co-localized with mitochondria during spermiogenesis,suggesting its involvement in *** *** results provide evidence for Pe-OPA1's involvement in the regulation of mitochondrial morphology during spermiogenesis.

关键词： optic atrophy protein 1(OPA1) spermiogenesis Phascolosoma esculenta mitochondrial dynamics spermatid

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Taxonomic dependency and spatial heterogeneity in assembly mechanisms of bacteria across complex coastal waters

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Ecological Processes 2024年第1期13卷 80-97页

作者： Huizhen Yan Dandan Lin Gaoke Gu Yujie Huang Xuya Hu Zhenhao Yu Dandi Hou Demin Zhang Barbara J.Campbell Kai Wang State key laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products School of Marine SciencesNingbo University key laboratory of marine biotechnology of zhejiang Province School of Marine Sciences Ningbo University Department of Biological Sciences Clemson University

Background Understanding community assembly mechanisms across taxa and space is fundamental for microbial ecology. However, the variability and determinants of assembly processes over taxa and space remain unclear. Here, we investigated taxonomic dependency and spatial heterogeneity in bacterial assembly mechanisms across coastal waters in the East China Sea using neutral and null models with customized visualization *** Overall, bacterial assembly mechanisms varied across broad taxonomic groups(phyla and proteobacterial classes) and space at the regional scale. A determinism–stochasticity balanced mechanism governed total bacterial assembly, while taxonomic dependency existed in assembly mechanisms and ecological processes. Among community ecological features, niche breadth and negative-to-positive cohesion ratio were strongly associated with the determinism-to-stochasticity ratio of bacterial groups. Bacterial assembly mechanisms commonly exhibited spatial heterogeneity, the extent and determinants of which varied across taxonomic groups. Spatial assembly of total bacteria was directly driven by many environmental factors and potential interactions between taxa, but not directly by geographic factors. Overall, the bacterial groups with higher spatial heterogeneity in assembly mechanisms were more related to environmental and/or geographic factors(except Bacteroidetes), while those with lower heterogeneity were more related to ecological *** Our results confirm the pervasiveness of taxonomic dependency and spatial heterogeneity in bacterial assembly, providing a finer understanding about regulation across complex coastal waters.

关键词： Bacterioplankton Assembly mechanism Niche breadth Null model Environmental gradient Biogeography

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Combined proteomic and metabolomic studies on the liver of Amur sturgeon Acipenser schrenckii under titanium dioxide nanoparticle exposure

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Journal of Oceanology and Limnology 2024年第3期42卷 1001-1015页

作者： Zhou ZHOU Ting LIU Jie KONG Zhenxing ZHAO Junquan ZHU key laboratory of Aquacultural biotechnology Ministry of Educationand Key Laboratory of Marine Biotechnology of Zhejiang ProvinceCollege of Marine SciencesNingbo UniversityNingbo 315000China Guizhou Fisheries Research Institute Guizhou Academy of Agriculture SciencesGuiyang 550000China

Nanomaterials,particularly titanium dioxide nanoparticles(TiO_(2)-NPs),are extensively utilized across various ***,their environmental release has raised concerns regarding their potential ecological and environmental *** reproductive toxicity of TiO_(2)-NPs in fish species has attracted considerable attention,yet conflicting research outcomes have been *** investigated the effects of TiO_(2)-NPs exposure on the liver of juvenile Amur sturgeon Acipenser schrenckii using label-free proteomic and untargeted metabolomic *** experiment included a control group and three groups exposed to different concentrations of TiO_(2)-NPs(low,TL;medium,TM;high,TH).Compared to the control group,9,19,and 25 proteins and 35,73,and 158 metabolites were differentially expressed in the TH,TM,and TL TiO_(2)-NP-exposed groups,*** differentially expressed genes(DEGs)were enriched in the Kyoto Encyclopedia for Genes and Genomes(KEGG)pathways related to glycolysis and ***,among the 126 correlated proteins,the most enriched pathways were associated with endocytosis and protein processing in the endoplasmic ***,syringic acid was significantly downregulated across all three TiO_(2)-NP-exposed *** obtain a comprehensive overview of the TiO_(2)-NP-induced expression changes,a co-regulated network of proteins and metabolites associated with TiO_(2)-NPs exposure was *** to TiO_(2)-NPs led to enrichment and alteration of pathways related to immune responses,including endocytosis,protein processing in the endoplasmic reticulum,and peroxisome proliferator-activated receptor(PPAR)*** conclusion,our findings indicate that exposure to TiO_(2)-NPs might disrupt glucose metabolism and induce immune responses,thus contributing to our understanding of the environmental impacts of nanomaterials and highlighting the need for further research and development of potential mitigation strategies.

关键词： TiO_(2)-nanoparticle exposure proteomics metabolomics glucose metabolism immune response

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OsATL32 ubiquitinates the reactive oxygen species-producing OsRac5-OsRbohB module to suppress rice immunity

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Journal of Integrative Plant Biology 2024年第7期66卷 1459-1480页

作者： Yuqing Yan Hui Wang Yan Bi Jiajing Wang Muhammad Noman Dayong Li Fengming Song National key laboratory for Rice Biology and Breeding Institute of BiotechnologyZhejiang UniversityHangzhou 310058China Ministry of Agriculture key laboratory of Molecular Biology of Crop Pathogens and Insect Pests Institute of BiotechnologyZhejiang UniversityHangzhou 310058China key laboratory of Biology of Crop Pathogens and Insects of zhejiang Province Institute of BiotechnologyZhejiang UniversityHangzhou 310058China

Ubiquitination-mediated protein degradation is integral to plant immunity,with E3 ubiquitin ligases acting as key factors in this ***,we report the functions of OsATL32,a plasma membrane-localized Arabidopsis Tóxicos En Levadura(ATL)-type E3 ubiquitin ligase,in rice(Oryza sativa)immunity and its associated regulatory *** found that the expression of OsATL32 is downregulated in both compatible and incompatible interactions between rice and the rice blast fungus Magnaporthe *** OsATL32 protein level declines in response to infection by a compatible *** strain or to chitin ***32 negatively regulates rice resistance to blast and bacterial leaf blight diseases,as well as chitin-triggered *** and genetic studies revealed that OsATL32 suppresses pathogen-induced reactive oxygen species(ROS)accumulation by mediating ubiquitination and degradation of the ROS-producing OsRac5–OsRbohB module,which enhances rice immunity against *** protein phosphatase PHOSPHATASE AND TENSIN HOMOLOG enhances rice blast resistance by dephosphorylating OsATL32 and promoting its degradation,preventing its negative effect on rice *** study provides insights into the molecular mechanism by which the E3 ligase OsATL32 targets a ROS-producing module to undermine rice immunity.

关键词： E3 ligase OsATL32 OsRac5-OsRbohB module phosphatase OsPTEN reactive oxygen species rice immunity

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Updated roles of the gut microbiota in exploring shrimp etiology, polymicrobial pathogens, and disease incidence

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Zoological Research 2024年第4期45卷 910-923页

作者： Jin-Bo Xiong Hao-Nan Sha Jiong Chen State key laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Marine SciencesNingbo UniversityNingboZhejiang 315211China key laboratory of Aquacultural biotechnology Ministry of EducationSchool of Marine SciencesNingbo UniversityNingboZhejiang 315211China laboratory of Biochemistry and Molecular Biology School of Marine SciencesNingbo UniversityNingboZhejiang 315211China

Litopenaeus vannamei is the most extensively cultured shrimp species globally,recognized for its scale,production,and economic ***,its aquaculture is plagued by frequent disease outbreaks,resulting in rapid and massive *** research often lags behind the emergence of new diseases,leaving the causal agents of some shrimp diseases unidentified and leading to nomenclature based on symptomatic presentations,especially in cases involving co-and polymicrobial *** data on shrimp disease statuses remain *** this review,we summarize current knowledge on shrimp diseases and their effects on the gut ***,we also propose a workflow integrating primary colonizers,“driver”taxa in gut networks from healthy to diseased states,disease-discriminatory taxa,and virulence genes to identify potential polymicrobial *** examine both abiotic and biotic factors(e.g.,external and internal sources and specific-disease effects)that influence shrimp gut microbiota,with an emphasis on the“holobiome”concept and common features of gut microbiota response to diverse *** excluding the effects of confounding factors,we provide a diagnosis model for quantitatively predicting shrimp disease incidence using disease common-discriminatory taxa,irrespective of the causal *** to the conservation of functional genes used in designing specific primers,we propose a practical strategy applying qPCR-assayed abundances of disease common-discriminatory functional *** review updates the roles of the gut microbiota in exploring shrimp etiology,polymicrobial pathogens,and disease incidence,offering a refined perspective for advancing shrimp aquaculture health management.

关键词： Shrimp disease Gut microbiota Polymicrobial pathogens Diagnosis model Disease common-discriminatory taxa Disease prediction

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A NAC transcription factor MNAC3-centered regulatory network negatively modulates rice immunity against blast disease

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Journal of Integrative Plant Biology 2024年第9期66卷 2017-2041页

作者： Hui Wang Yan Bi Yuqing Yan Xi Yuan Yizhou Gao Muhammad Noman Dayong Li Fengming Song National key laboratory for Rice Biology and Breeding Institute of BiotechnologyZhejiang UniversityHangzhou 310058China Ministry of Agriculture key laboratory of Molecular Biology of Crop Pathogens and Insect Pests Institute of BiotechnologyZhejiang UniversityHangzhou 310058China key laboratory of Biology of Crop Pathogens and Insects of zhejiang Province Institute of BiotechnologyZhejiang UniversityHangzhou 310058China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004China

NAC transcription factors(TFs)are pivotal in plant immunity against diverse ***,we report the functional and regulatory network of MNAC3,a novel NAC TF,in rice ***3,a transcriptional activator,negatively modulates rice immunity against blast and bacterial leaf blight diseases and pathogen-associated molecular pattern(PAMP)-triggered immune ***3 binds to a CACG cis-element and activates the transcription of immune-negative target genes OsINO80,OsJAZ10,and *** negative function of MNAC3 in rice immunity depends on its transcription of downstream genes such as OsINO80 and ***3 interacts with immunity-related OsPP2C41(a protein phosphatase),ONAC066(a NAC TF),and OsDjA6(a DnaJ chaperone).ONAC066 and OsPP2C41 attenuate MNAC3 transcriptional activity,while OsDjA6 promotes *** of MNAC3 at S163 is critical for its negative functions in rice ***2C41,which plays positive roles in rice blast resistance and chitin-triggered immune responses,dephosphorylates MNAC3,suppressing its transcriptional activity on the target genes OsINO80,OsJAZ10,and OsJAZ11 and promoting the translocation of MNAC3 from nucleus to *** results establish a MNAC3-centered regulatory network in which OsPP2C41 dephosphorylates MNAC3,attenuating its transcriptional activity on downstream immune-negative target genes in ***,these findings deepen our understanding of molecular mechanisms in rice immunity and offer a novel strategy for genetic improvement of rice disease resistance.

关键词： NAC transcription factor MNAC3 OsINO80 OsJAZ10 OsJAZ11 protein phosphatase OsPP2C41 rice immunity

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Analysis and Characterization of the GABA Transaminase and Succinate Semialdehyde Dehydrogenase Genes in the Microalga Isochrysis zhanjiangensis in Response to Abiotic Stresses

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Journal of Ocean University of China 2024年第3期23卷 775-785页

作者： TIAN Jiaojiao ZHANG Lin LU Xinyue YE Lingzhi WU Yuanyuan CHEN Deshui CAO Jiayi JIANG Jiaxin XU Jilin YAN Xiaojun key laboratory of marine biotechnology of zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China key laboratory of Aquacultural biotechnology Ministry of Education Ningbo UniversityNingbo 315211China Laizhou Bay marine Technology Co. Ltd.Yantai 261400China Fujian Dalai Seed Science and Technology Co. Ltd.Ningde 352101China

Gamma-aminobutyric acid(GABA),widely existing in different organisms,is rapidly accumulated in plants in response to environmental *** main biosynthesis and degradation pathways of GABA constitute the GABA shunt,which is tied to the tricarboxylic acid(TCA)*** transaminase(GABA-T)and succinate semialdehyde dehydrogenase(SSADH)are two essential enzymes for the GABA degradation *** there are abundant studies on GABA shunt in higher plants at the physiological and genetic levels,research on its role in microalgae remains *** study aimed at exploring the function of GABA-T and SSADH genes in Isochrysis zhanjiangensis,an important diet microalga,under different *** cloned two GABA-T genes,IzGABA-T1 and IzGABA-T2,and one SSADH gene IzSSADH from Isochrysis zhanjiangensis and conducted heterologous expression *** results showed that the overexpression of IzGABA-T1 or IzGABA-T2 enhanced the survival rates of yeast transformants under heat or NaCl stress,while the overexpression of IzSSADH improved yeast tolerance to NaCl stress but had no obvious effect on heat ***,the results of quantitative real-time polymerase chain reaction(qPCR)showed that IzGABA-T1 transcription increased in the HT(salinity 25,35℃)and LS(salinity 15,25℃)*** 24 h,the IzGABA-T2 transcriptions increased in the HT,LS,and HS(salinity 35,25℃)groups,but their transcription levels decreased in all groups at 48 *** transcription increased in the LS *** results suggest that IzGABA-T1,IzGABA-T2,and IzSSADH are associated with temperature and salinity stresses and possess a certain preference for different stresses.

关键词： abiotic stress GABA heterologous expression Isochrysis zhanjiangensis transcription

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Arabidopsis WRKY1 promotes monocarpic senescence by integrative regulation of flowering,leaf senescence,and nitrogen remobilization

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Molecular Plant 2024年第8期17卷 1289-1306页

作者： Wei Zhang Shufei Tang Xuying Li Yuanyuan Chen Jiajia Li Yuyang Wang Ruichao Bian Ying Jin Xiaoxian Zhu Kewei Zhang zhejiang Provincial key laboratory of biotechnology on Specialty Economic Plants College of Life SciencesZhejiang Normal UniversityJinhuaZhejiang 321004P.R.China

Monocarpic senescence,characterized by whole-plant senescence following a single flowering phase,is widespread in seed plants,particularly in crops,determining seed harvest time and ***,how external and internal signals are systemically integrated into monocarpic senescence remains largely ***,we report that the Arabidopsis thaliana transcription factor WRKY1 plays essential roles in multiple key steps of monocarpic ***1 expression is induced by age,salicylic acid(SA),and nitrogen(N)*** and leaf senescence are accelerated in the WRKY1 overexpression lines but are delayed in the wrky1 *** combined DNA affinity purification sequencing and RNA sequencing analyses uncover the direct target genes of *** studies show that WRKY1 coordinately regulates three processes in monocarpic senescence:(1)suppressing FLOWERING LOCUS C gene expression to initiate flowering,(2)inducing SA biosynthesis genes to promote leaf senescence,and(3)activating the N assimilation and transport genes to trigger N *** summary,our study reveals how one stress-responsive transcription factor,WRKY1,integrates flowering,leaf senescence,and N remobilization processes into monocarpic senescence,providing important insights into plant lifetime regulation.

关键词： monocarpic senescence leaf senescence flowering time nitrogen remobilization salicylic acid WRKY transcription factor

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A pair of nuclear factor Y transcription factors act as positive regulators in jasmonate signaling and disease resistance in Arabidopsis

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Journal of Integrative Plant Biology 2024年第9期66卷 2042-2057页

作者： Chuyu Lin Chenghao Lan Xiaoxiao Li Wei Xie Fucheng Lin Yan Liang Zeng Tao Ministry of Agriculture key laboratory of Molecular Biology of Crop Pathogens and Insects Institute of BiotechnologyZhejiang UniversityHangzhou 310058China State key laboratory for Managing Biotic and Chemical Treats to the Quality and Safety of Agro‐products Institute of BiotechnologyZhejiang UniversityHangzhou 311400China

The plant hormone jasmonate(JA)regulates plant growth and immunity by orchestrating a genome-wide transcriptional *** the resting stage,JASMONATE-ZIM DOMAIN(JAZ)proteins act as main repressors to regulate the expression of JA-responsive genes in the JA signaling ***,the mechanisms underlying de-repression of JA-responsive genes in response to JA treatment remain ***,we report two nuclear factor Y transcription factors NF-YB2 and NF-YB3(thereafter YB2 and YB3)play key roles in such de-repression in ***2 and YB3 function redundantly and positively regulate plant resistance against the necrotrophic pathogen Botrytis cinerea,which are specially required for transcriptional activation of a set of JA-responsive genes following ***,YB2 and YB3 modulated their expression through direct occupancy and interaction with histone demethylase Ref6 to remove repressive histone ***,YB2 and YB3 physically interacted with JAZ repressors and negatively modulated their abundance,which in turn attenuated the inhibition of JAZ proteins on the transcription of JA-responsive genes,thereby activating JA response and promoting disease ***,our study reveals the positive regulators of YB2 and YB3 in JA signaling by positively regulating transcription of JA-responsive genes and negatively modulating the abundance of JAZ proteins.

关键词： histone demethylase jasmonate response JAZ repressor necrotrophic resistance nuclear factor

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