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Context‑dependent antioxidant defense system(ADS)‑based stress memory in response to recurrent environmental challenges in congeneric invasive species

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Marine Life Science & Technology 2024年第2期6卷 315-330页

作者： Hanxi Li Xuena Huang Aibin Zhan Research Center for Eco-environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Marine ecosystems are facing escalating environmental fluctuations owing to climate change and human activities,imposing pressures on marine species.To withstand recurring environmental challenges,marine organisms,especially benthic species lacking behavioral choices to select optimal habitats,have to utilize well-established strategies such as the antioxidant defense system(ADS)to ensure their survival.Therefore,understanding of the mechanisms governing the ADS-based response is essential for gaining insights into adaptive strategies for managing environmental challenges.Here we conducted a com-parative analysis of the physiological and transcriptional responses based on the ADS during two rounds of'hypersalinity-recovery'challenges in two model congeneric invasive ascidians,Ciona robusta and C.savignyi.Our results demonstrated that C.savignyi exhibited higher tolerance and resistance to salinity stresses at the physiological level,while C.robusta demonstrated heightened responses at the transcriptional level.We observed distinct transcriptional responses,particularly in the utilization of two superoxide dismutase(SOD)isoforms.Both Ciona species developed physiological stress memory with elevated total SOD(T-SOD)and glutathione(GSH)responses,while only C.robusta demonstrated transcriptional stress memory.The regulatory distinctions within the Nrf2-Keap1 signalling pathway likely explain the formation disparity of transcriptional stress memory between both Ciona species.These findings support the'context-dependent stress memory hypothesis',emphasizing the emergence of species-specific stress memory at diverse regulatory levels in response to recurrent environmental challenges.Our results enhance our understanding of the mechanisms of environmental challenge manage-ment in marine species,particularly those related to the ADS.

关键词： Antioxidant defense Ascidian Biological invasion environmental stress stress memory

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Integrative regulatory mechanisms of stomatal movements under changing climate

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Journal of Integrative Plant Biology 2024年第3期66卷 368-393页

作者： Jingbo Zhang Xuexue Chen Yajing Song Zhizhong Gong State Key Laboratory of Nutrient Use and Management College of Resources and Environmental SciencesNational Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijing 100193China State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Plant environmental Resilience College of Biological SciencesChina Agricultural UniversityBeijing 100094China Institute of Life Science and Green Development School of Life SciencesHebei UniversityBaoding 071001China

Global climate change-caused drought stress,high temperatures and other extreme weather profoundly impact plant growth and development,restricting sustainable crop production.To cope with various environmental stimuli,plants can optimize the opening and closing of stomata to balance CO_(2)uptake for photosynthesis and water loss from leaves.Guard cells perceive and integrate various signals to adjust stomatal pores through turgor pressure regulation.Molecular mechanisms and signaling networks underlying the stomatal movements in response to environmental stresses have been extensively studied and elucidated.This review focuses on the molecular mechanisms of stomatal movements mediated by abscisic acid,light,CO_(2),reactive oxygen species,pathogens,temperature,and other phytohormones.We discussed the significance of elucidating the integrative mechanisms that regulate stomatal movements in helping design smart crops with enhanced water use efficiency and resilience in a climate-changing world.

关键词： environmental stress guard cell plant regulatory mechanisms stomatal movements

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Overview of yeast environmental stress response pathways and the development of tolerant yeasts

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Systems Microbiology and Biomanufacturing 2022年第2期2卷 232-245页

作者： Nai-Xin Lin Yan Xu Xiao-Wei Yu Lab of Brewing Microbiology and Applied Enzymology School of BiotechnologyJiangnan UniversityWuxi 214122China Key Laboratory of Industrial Biotechnology Ministry of EducationSchool of BiotechnologyJiangnan UniversityWuxi 214122China

Yeast is widely used for industrial production of various types of products,such as ethanol and enzymes.However,its fermentation efficiency is strongly reduced by harmful environmental stresses.Specifically,harmful environmental stresses damage important cellular components,such as cell wall,cell membrane,proteins,etc.Then,these damages cause cellular metabolic disorders or even death.In the past decades,there has been a portfolio of studies on the environmental stress tolerance of yeasts,which mainly aimed at cell damages caused by different environmental stresses,different ways to improve yeast environmental stress tolerance or a tolerance mechanism for certain environmental stress.However,a comprehensive overview of how yeasts respond to environmental stresses is lacking,and the correlation of tolerance mechanism between different environmental stresses is unclear.In this review,we summarized the general damages induced by most of environmental stresses,the existing major mechanisms of environmental stress tolerance from the perspective of key signalling pathways,and the common ways to improve the resistance to environmental stresses in yeast cells.The tolerance mechanisms of yeast cells to different environmental stresses are diverse,but sometimes they share the same signalling pathway.Cells use sensors on the cell surface to recognize environmental stresses and transmit signals to the nucleus to cause changes in gene expression.By summarizing the main signalling pathways,including MAPK pathway,cAMP/PKA pathway,YAP1/SKN7 pathway,it will provide a powerful reference for future efforts to promote yeast environmental stress tolerance and study yeast tolerance mechanisms.

关键词： Yeast environmental stress Signalling pathway Protein aggregation

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United under stress:High-speed transport network emerging at bacterial living edge

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Fundamental Research 2024年第3期4卷 563-569页

作者： Xiaodong Wen Jingjing Feng Yuqian Sang Feng Ge Hugues Chaté Yan He Department of Chemistry Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical BiologyTshinghua UniversityBeijing 100084China Service de Physique de l'Etat Condensé CEACNRSUniversitéParis-SaclayCEA-SaclayGif-sur-Yvette 91191France Beijing Computational Science Research Center Beijing 100094China

Individuals tend to move freely when there is enough room but would act collectively for their survival under external stress.In the case of living cells,for instance,when a drop of low-density flagellated bacterial solution is transferred onto the agar surface,the initially disordered movement of individual bacteria would be replaced with coordinated cell swarming after a lag phase of a few hours.Here,we study how such cooperation is established while overcoming the disorder at the onset of the lag phase with single nanoparticle tracking.Upon the spreading of the droplet,the bacteria in the solution cluster and align near the almost immobilized contact line confining the drop,forming a narrow ring of cells.As individual cells move in and out of the ring continuously,certain flow patterns emerge in the inter-bacterial fluid.We reveal high-speed long-distance unidirectional flows with definite chirality along the outside of the ring,along the inside of the ring and across the ring.We speculate that these flows enable the fast and efficient transport,facilitating the communication and unification of the bacterial community.

关键词： Bacterial droplet environmental stress Single particle tracking Biological edge Flow transport network

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environmental stress and Pre-mRNA Splicing

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Molecular Plant 2015年第9期8卷 1302-1303页

作者： Peng Cui Liming Xiong Biological and environmental Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwa123955 Saudi Arabia

Pre-mRNA splicing is an important step for gene expression regulation in plants in response to abiotic stress. In recent years, RNA sequencing （RNA-seq） based on various next-generation sequencing technologies has been used to study dynamic changes of pre-mRNA splicing under conditions of diverse abiotic stress in several plant species. Accumulating results indi- cate that alternative splicing （AS） of pre-mRNA is closely linked with environmental stress response in plants.

关键词： environmental stress Pre-mRNA Splicing

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Cu(Ⅱ), Fe(Ⅲ) and Mn(Ⅱ) combinations as environmental stress factors have distinguishing effects on Enterococcus hirae

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Journal of environmental Sciences 2015年第2期27卷 95-100页

作者： Zaruhi Vardanyan Armen Trchounian Department of Biophysics Faculty of Biology Yerevan State University Department of Microbiology Plants and Microbes Biotechnology Faculty of Biology Yerevan State University

Pollution by various heavy metals as environmental stress factors might affect bacteria. It was established that iron（Fe（Ⅲ））, manganese（Mn（Ⅱ）） and copper（Cu（Ⅱ）） ion combinations caused effects on Enterococcus hirae that differed from the sum of the effects when the metals were added separately. It was shown that the Cu2＋–Fe3＋combination decreased the growth and ATPase activity of membrane vesicles of wild-type E. hirae ATCC9790 and atp D mutant（with defective FoF1-ATPase） MS116. Addition of Mn2＋–Fe3＋combinations within the same concentration range had no effects on growth compared to control（without heavy metals）. ATPase activity was increased in the presence of Mn2＋–Fe3＋, while together with0.2 mmol/L N,N′-dicyclohexylcarbodiimide（DCCD）, ATPase activity was decreased compared to control（when only 0.2 mmol/L DCCD was present）. These results indicate that heavy metals ion combinations probably affect the FOF1-ATPase, leading to conformational changes. Moreover the action may be direct or be mediated by environment redox potential.The effects observed when Fe3＋was added separately disappeared in both cases, which might be a result of competing processes between Fe3＋and other heavy metals. These findings are novel and improve the understanding of heavy metals ions effects on bacteria,and could be applied for regulation of stress response patterns in the environment.

关键词： Heavy metal ions environmental stress Bacterial growth ATPase activity Enterococci

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Real-time cell analysis and heat shock protein gene expression in the TcA Tribofium castaneum cell line in response to environmental stress conditions

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Insect Science 2017年第3期24卷 358-370页

作者： Andres Garcia-Reina Maria Juliana Rodriguez-Garcia Guillermo Ramis Jose Galian Department of Zoology and Physical Anthropology University of MurciaCampus Mare Nostrum E-30100 Murcia Spain Department of Animal Production Faculty of Veterinary University of MurciaCampus Mare Nostrum E-30100 Murcia Spain

The rust red flour beetle, Tribolium castaneum （Herbst, 1797）（Coleoptera： Tenebrionidae）, is a pest of stored grain and one of the most studied insect model species. Some of the previous studies involved heat response studies in terms of survival and heat shock protein expression, which are regulated to protect other proteins against environ- mental stress conditions. In the present study, we characterize the impedance profile with the xCELLigence Real-Time Cell Analyzer and study the effect of increased temperature in cell growth and viability in the cell line BCIRL-TcA-CLG 1 （TcA） of T castaneum. This novel system measures cells behavior in real time and is applied for the first time to insect cells. Additionally, cells are exposed to heat shock, increased salinity, acidic pH and UV-A light with the aim of measuring the expression levels of lisp27, Hsp68a, and Hsp83 genes. Results show a high thermotolerance of TeA in terms of cell growth and viability. This result is likely related to gene expression results in which a significant up-regulation of all studied Hsp genes is observed after 1 h of exposure to 40 ~C and UV light. All 3 genes show similar expression patterns, but Hsp27 seems to be the most affected. The results of this study validate the RTCA method and reveal the utility of insect cell lines, real-time analysis and gene expression studies to better understand the physiological response of insect cells, with potential applications in different fields of biology such as conservation biology and pest management.

关键词： environmental stress gene expression heat shock proteins insect cells,real-time cell analysis （RTCA） red flour beetle

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Chromatin remodeling factors regulate environmental stress responses in plants

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Journal of Integrative Plant Biology 2021年第3期63卷 438-450页

作者： Ze-Ting Song Jian-Xiang Liu Jia-Jia Han Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology Yunnan UniversityKunming 650500China State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou 310027China Laboratory of Ecology and Evolutionary Biology State Key Laboratory for Conservation and Utilization of Bio‐Resources in YunnanYunnan UniversityKunming 650500China

environmental stress from climate change and agricultural activity threatens global plant biodiversity as well as crop yield and quality.As sessile organisms,plants must maintain the integrity of their genomes and adjust gene expression to adapt to various environmental changes.In eukaryotes,nucleosomes are the basic unit of chromatin around which genomic DNA is packaged by condensation.To enable dynamic access to packaged DNA,eukaryotes have evolved Snf2(sucrose nonfermenting 2)family proteins as chromatin remodeling factors(CHRs)that modulate the position of nucleosomes on chromatin.During plant stress responses,CHRs are recruited to specific genomic loci,where they regulate the distribution or composition of nucleosomes,which in turn alters the accessibility of these loci to general transcription or DNA damage repair machinery.Moreover,CHRs interplay with other epigenetic mechanisms,including DNA methylation,histone modifications,and deposition of histone variants.CHRs are also involved in RNA processing at the posttranscriptional level.In this review,we discuss major advances in our understanding of the mechanisms by which CHRs function during plants’response to environmental stress.

关键词： chromatin remodeling environmental stress epigenetic regulation replication stress stress responses

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The Role of environmental stress in Determining Gut Microbiome:Case Study of Two Sympatric Toad-headed Lizards

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Asian Herpetological Research 2020年第4期11卷 373-380页

作者： Yue Qi Wei ZHAO Yangyang ZHAO Xiaoning WANG Chenkai NIU Gansu Key Laboratory of Biomonitoring and Bioremediation for environmental Pollution School of Life SciencesLanzhou UniversityLanzhou 730000GansuChina

The gut microbiota has gained attention because of its importance in facilitating host survival and evolution.However,it is unclear whether gut microbial communities are determined by the host(heritable factor) or environment(environmental factor).In this study,we investigated the gut microbial communities and potential functional signatures of two sympatric species distributed along an elevation gradient,the toadheaded lizards Phrynocephalus axillaris and P.forsythii.Our results indicated that at high elevations,the gut microbial communities of P.axillaris and P.forsythii did not significantly differ,and the phylogenetic relationships of gut microbial communities contradicted their hosts.At low altitudes,the two lizards could be distinguished based on their significantly different gut microbial communities.Compared to low-altitude populations,Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis showed that at higher altitudes,energy metabolism,such as carbohydrate,lipid,and amino acids metabolism were higher in both lizards.While a larger number of pathogenic bacteria were found in the lowaltitude population of P.forsythii.This suggests that the convergence of gut microbiota of two lizards at highaltitude stem from environmental factors,as they were exposed to the same environmental stress,whereas the divergence at low-altitude stemmed from heritable factors,as they were exposed to different environmental stresses.These results provide a new perspective regarding whether heritable or environmental factors dominate the gut microbiota during exposure to environmental stress.

关键词： gut microbiota environmental factor environmental stress heritable factor toad-headed lizard

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Research Progress on Lonicera japonica Thunb.Affected by environmental stress

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Agricultural Biotechnology 2022年第1期11卷 12-18页

作者： Jinggang LI Longtai JU Lei ZHANG Panpan SUN Min LI Jia LI Yang LIU Dawa Forest Farm of Pingyi County Shandong ProvincePingyi 273305China Shandong University of Traditional Chinese Medicine Jinan 250355China School of Biology and Brewing Engineering Taishan UniversityTai an 271000China

Lonicera japonica Thunb.is widely distributed in China.It has strong adaptability to the environment and can maintain normal growth and development under a variety of stress conditions.It is commonly used as a medicine with its dry flower buds or newly opened flowers,named honeysuckle,and with both economic value and ecological application value.The research progress of L.japonica Thunb.under stress conditions such as temperature,drought,light,salt,heavy metals and diseases,pests and endophytic bacteria was reviewed,and the current research situation of the physiological and biochemical response mechanism,changes of photosynthetic fluorescence and accumulation of secondary metabolites of honeysuckle under different stresses was discussed,so as to provide a reference for deep-level exploring the resistance mechanism of L.japonica Thunb.in the future and lay a theoretical foundation for the high-quality authentic ecological cultivation of L.japonica Thunb.

关键词： Honeysuckle environmental stress stress resistance Response mechanism

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