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Physiological,transcriptome and gene functional analysis provide novel sights into cadmium accumulation and tolerance mechanisms in kenaf

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Journal of Environmental Sciences 2024年第3期137卷 500-514页

作者： Shan Cao Meng Wang Jiao Pan Dengjie Luo Samavia Mubeen Caijin Wang Jiao Yue Xia Wu Qijing Wu Hui Zhang Canni Chen Muzammal Rehman Sichen Xie Ru Li Peng Chen guangxi key laboratory of Agro-environment and Agric-products safety Key Laboratory of Plant Genetics and BreedingCollege of AgricultureGuangxi UniversityNanning 530004China State key laboratory for conservation and utilization of Subtropical Agro-bioresources College of Life Science and TechnologyGuangxi UniversityNanning 530004China

Kenaf is considered to have great potential for remediation of heavy metals in ***,studies on molecular mechanisms of root Cd accumulation and tolerance are still *** this study,two differently tolerant kenaf cultivars were selected as materials and the physiological and transcriptomic effects were evaluated under Cd *** study showed that 200μmol/L CdCl_(2) treatment triggered the reactive oxygen species(ROS)explosion and membrane lipid *** with the Cd-sensitive cultivar‘Z',the Cd-tolerant cultivar‘F'was able to resist oxidative stress in cells by producing higher antioxidant enzyme activities and increasing the contents of ascorbic acid(AsA)and glutathione(GSH).The root cell wall of‘F'exhibited higher polysaccharide contents under Cd treatment,providing more Cd-binding *** were 3,439 differentially expressed genes(DEGs)that were co-regulated by Cd treatment in two *** biosynthesis and plant hormone signal transduction pathways were significantly enriched by functional annotation *** associated with pectin,cellulose,and hemi-cellulose metabolism were involved in Cd chelation of root cell wall;V-ATPases,ABCC3 and Narmp3 could participated in vacuolar compartmentalization of Cd;PDR1 was responsible for Cd effux;the organic acid transporters contributed to the absorption of Cd in *** genes might have played key roles in kenaf Cd tolerance and Cd ***,HcZIP2 was identified to be involved in Cd uptake and transport in *** findings provide a deeper understanding of the molecular pathways underlying Cd accumulation and detoxification mechanisms in kenaf.

关键词： Kenaf Cd stress Physiological Transcriptome HcZIP2

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Trophic gauntlet effects on fisheries recovery:a case study in Sansha Bay,China

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Ecosystem Health and Sustainability 2021年第1期7卷 318-331页

作者： Bin Xie Cheng Huang Ya Wang Xijie Zhou Guogan Peng Yancheng Tao Jiaju Huang Xiaoqing Lin Lingfeng Huang key laboratory of the Ministry of Education for Coastal and Wetland Ecosystems College of the Environment and EcologyXiamen UniversityXiamen China Fujian Provincial key laboratory of Coastal Ecology and Environmental Studies Xiamen UniversityXiamen China guangxi key Lab of mangrove conservation and utilization Guangxi Academy of SciencesBeihai China

Low biological productivity causes ecosystem energy *** Bay is an important spawning and nursery ground for migratory fish in the East China Sea(ECS).There is significant mariculture in this area,but stock enhancement programs and seasonal fishery closures have failed to recover populations of the commercially important species,Larimichthys *** want to figure out the potential reason of unsuccessful *** resource in recent 30 *** this study,the trophic status of ***,the food source proportions of *** and zooplankton,and the food web structure and functioning of Sansha Bay was analyzed.A high nutrient low chlorophyll phenomenon was observed:this prevented harmful algal blooms,and phytoplankton growth was restrained by intensive macroalgal culture,resulting in a low abundance of zooplankton in Sansha *** was the most important food source of zooplankton,and zooplankton was the greatest food source of juvenile *** *** suffered from ***,most of the phytoplankton was not used efficiently in the Sansha Bay *** study suggests that trophic bottleneck,caused by food limitation,is a potential reason for unsuccessful fishery recovery in enclosed bay with macroalgal culture.

关键词： High nutrient low chlorophyll ecopath stable isotope mariculture Sansha Bay Larimichthys crocea

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Stomatal dynamics are regulated by leaf hydraulic traits and guard cell anatomy in nine true mangrove species

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Plant Diversity 2024年第3期46卷 395-405页

作者： Ya-Dong Qie Qi-Wei Zhang Scott A.M.McAdam Kun-Fang Cao State key laboratory for conservation and utilization of Subtropical Agro-Bioresources College of ForestryGuangxi UniversityNanning 530004China guangxi key laboratory of Forest Ecology and conservation College of ForestryGuangxi UniversityNanning 530004China key laboratory of Ecology of Rare and Endangered Species and Environmental Protection Ministry of EducationGuangxi Normal UniversityGuilin 541001China guangxi key laboratory of Landscape Resources conservation and Sustainable utilization in Lijiang River Basin Guangxi Normal UniversityGuilin 541001China Purdue Center for Plant Biology Department of Botany and Plant PathologyPurdue UniversityWest LafayetteIN 47907USA

Stomatal regulation is critical for mangroves to survive in the hyper-saline intertidal zone where water stress is severe and water availability is highly ***,very little is known about the stomatal sensitivity to vapour pressure deficit(VPD)in mangroves,and its co-ordination with stomatal morphology and leaf hydraulic *** measured the stomatal response to a step increase in VPD in situ,stomatal anatomy,leaf hydraulic vulnerability and pressure-volume traits in nine true mangrove species of five families and collected the data of genome *** aimed to answer two questions:(1)Does stomatal morphology influence stomatal dynamics in response to a high VPD in mangroves?with a consideration of possible influence of genome size on stomatal morphology;and(2)do leaf hydraulic traits influence stomatal sensitivity to VPD in mangroves?We found that the stomata of mangrove plants were highly sensitive to a step rise in VPD and the stomatal responses were directly affected by stomatal anatomy and hydraulic ***,denser stomata was correlated with faster stomatal closure at high VPD across the species of Rhizophoraceae,and stomata size negatively and vein density positively correlated with genome *** negative leaf osmotic pressure at the full turgor(πo)was related to higher operating steady-state stomatal conductance(gs);and a higher leaf capacitance(Cleaf)and more embolism resistant leaf xylem were associated with slower stomatal responses to an increase in *** addition,stomatal responsiveness to VPD was indirectly affected by leaf morphological traits,which were affected by site salinity and consequently leaf water *** results demonstrate that mangroves display a unique relationship between genome size,stomatal size and vein packing,and that stomatal responsiveness to VPD is regulated by leaf hydraulic traits and stomatal *** work provides a quantitative framework to better understand of stomatal regulation in mangroves

关键词： Stomatal temporal kinetics Vapour-pressure deficit(VPD) Leaf water relations Leaf hydraulic vulnerability Leaf osmotic potential Genome size

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Individual variation in buffalo somatic cell cloning efficiency is related to glycolytic metabolism

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Science China(Life Sciences) 2022年第10期65卷 2076-2092页

作者： Chan Luo Zhiqiang Wang Jinling Wang Feng Yun Fenghua Lu Jiayuan Fu Qingyou Liu Deshun Shi State key laboratory for conservation and utilization of Subtropical Agro-Bioresources Guangxi UniversityNanning 530005China College of Animal Science and Technology Guangxi UniversityNanning 530005China

Mammalian individuals differ in their somatic cell cloning efficiency,but the mechanisms leading to this variation is poorly *** we found that high cloning efficiency buffalo fetal fibroblasts(BFFs)displayed robust energy metabolism,looser chromatin structure,high H3 K9 acetylation and low heterochromatin protein 1α(HP1α)*** cloning efficiency BFFs had more H3 K9 ac regions near to the upstream of glycolysis genes by Ch IP-seq,and involved more openness loci related to glycolysis genes through *** expression of these glycolysis genes was also found to be higher in high cloning efficiency BFFs by q *** key enzymes of glycolysis,PDKs and LDH,were confirmed to be associated with histone acetylation and chromatin openness of *** of low cloning efficiency BFFs with PS48(activator of PDK1)resulted in an increase in the intracellular lactate production and H3 K9 acetylation,decrease in histone deacetylase activity and HP1αexpression,less condensed chromatin structure and more cloning embryos developing to *** results indicate that the cloning efficiency of buffalo somatic cells is associated with their glycolytic metabolism and chromatin structure,and can be improved by increasing glycolytic metabolism.

关键词： buffalo cloning efficiency chromatin openness histone acetylation glycolytic metabolism

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Influence factors of methane hydrate formation from ice:Temperature,pressure and SDS surfactant

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Chinese Journal of Chemical Engineering 2019年第2期27卷 405-410页

作者： Weiguo Liu Yanghui Li Xiaohu Xu key laboratory of Ocean Energy utilization and Energy conservation of Ministry of Education Dalian University of Technology

A series of experiments of forming hydrate from ice powders in different conditions have been carried out with constant volume method to evaluate the influence factors such as pressure, temperature, and SDS surfactant. The change of temperature and pressure were collected as a function of elapsed time, which were used to calculate the gas consumption and hydrate saturation during hydrate formation(pVT method). Based on the experimental results and the analysis, it is concluded that:(1) Both initial pressure and temperature have effect on the hydrate formation and temperature plays a more important role in the process;(2) heating and secondary pressurization will promote the gas hydrate formation and enhance the hydrate saturation as a result. Meanwhile, the promotion of heating seems to be more obvious than that of secondary pressurization;(3) different concentrations of SDS surfactant have clearly influence on the saturation of gas hydrate and there is an optimal concentration to promote the hydrate formation.

关键词： Methane hydrate Ice Heating Secondary pressurization Surfactant

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Rapid field testing of mercury pollution by designed fluorescent biosensor and its cells-alginate hydrogel-based paper assay

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Journal of Environmental Sciences 2021年第8期33卷 161-170页

作者： Yanan Zheng Liudan Wei Linwei Duan Fangfang Yang Guixiang Huang Tianyi Xiao Min Wei Yanling Liang Huiting Yang Zhipeng Li Dan Wang College of Chemistry and Materials Guangxi Key Laboratory of Natural Polymer Chemistry and PhysicsNanning Normal UniversityNanning 530001China State key laboratory for conservation and utilization of Subtropical Agro–Bioresources Guangxi UniversityNanning 530004China guangxi-ASEAN Food Inspection and Testing Center China

With increasing industrial activities,mercury has been largely discharged into environment and caused serious environmental *** growing level of mercury pollution has become a huge threat to human health due to its significant ***,the simple and fast means for on-site monitoring discharged mercury pollution are highly necessary to protect human beings from its pernicious effects in ***,a"turn off"fluorescent biosensor(mCherry L199 C)for sensing Hg2+was successfully designed based on direct modification of the chromophore environment of fluorescent protein *** rapid screening and characterization,the designed variant of mCherry(mCherry L199 C)was directly expressed on outer-membrane of Escherichia coli cells by cell surface display *** fluorescent biosensor was characterized to have favorable response to Hg2+at micromole level among other metal ions and over a broad pH ***,the cells of the fluorescent biosensor were encapsulated in alginate hydrogel to develop the cells-alginate hydrogel-based *** cells-alginate hydrogel-based paper could detect mercury pollution in 5 min with simple operation process and inexpensive equipment,and it could keep fluorescence and activity stable at 4℃ for 24 hr,which would be a high-throughput screening tool in preliminarily reporting the presence of mercury pollution in natural setting.

关键词： Mercury pollution Fluorescent biosensor Mercury detection In natural setting Cells-alginate hydrogel-based paper

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Dissociation characteristics of methane hydrate using depressurization combined with thermal stimulation

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Chinese Journal of Chemical Engineering 2019年第9期27卷 2089-2098页

作者： Mingjun Yang Zhanquan Ma Yi Gao Lanlan Jiang key laboratory of Ocean Energy utilization and Energy conservation of Ministry of Education Dalian University of Technology

Methane hydrate is considered as a potential energy source in the future due to its abundant reserves and high energy *** investigate the influence of initial hydrate saturation,production pressure,and the temperature of thermal stimulation on gas production rate and cumulative gas production percentage,we conducted the methane hydrate dissociation experiments using depressurization,thermal stimulation and a combination of two methods in this *** is found that when the gas production pressures are the same,the higher the hydrate initial saturation,the greater change in hydrate reservoir ***,it is easier to appear the phenomenon of icing and hydrate reformation when the hydrate saturation is *** example,the reservoir temperature dropped to below zero in depressurization process when the hydrate saturation was about 37%.However,the same phenomenon didn’t appear as the saturation was about 12%.This may be due to more free gas in the reservoir with hydrate saturated of 37%.We also find that the temperature variation of reservoir can be reduced effectively by combination of depressurization and thermal stimulation *** the average gas production rate is highest with combined method in the *** the pressure of gas production is 2 MPa,compared with depressurization,the average of gas production can increase 54%when the combined method is *** efficiency of gas production is very low when thermal stimulation was used *** the temperature of thermal stimulation is 11℃,the average rate of gas production in the experiment of thermal stimulation is less than 1/3 of that in the experiment of the combined method.

关键词： Methane hydrate Depressurization Thermal stimulation Dissociation characteristics

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R3-MYB proteins OsTCL1 and OsTCL2 modulate seed germination via dual pathways in rice

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The Crop Journal 2023年第6期11卷 1752-1761页

作者： Yong Yi Chan Lin Xueyan Peng Meishan Zhang Jiaming Wu Chunmei Meng Shengchao Ge Yunfeng Liu Yuan Su State key laboratory for conservation and utilization of Subtropical Agro-bioresources College of Life Science and TechnologyGuangxi UniversityNanning 530004GuangxiChina Life Sciences Institute Guangxi Medical UniversityNanning 530021GuangxiChina

Salt and drought stress are common abiotic factors that exert a detrimental influence on seed germination,potentially leading to significantly impaired growth and production in *** a comprehensive understanding of the molecular response of seeds to abiotic stress during the germination is of paramount *** the present study,we identified two R3-MYB genes in rice,namely OsTCL1 and OsTCL2,and characterized their roles in regulating seed germination under salt and drought *** with tcl1 and tcl2 mutant alleles exhibited delayed seed germination,particularly under stress *** tcl1 tcl2 double mutant showed an even more pronounced reduction in germination during initial stages of germination,thereby indicating a redundant regulatory function of OsTCL1 and OsTCL2 in seed germination under abiotic ***,we demonstrated that the transcript levels of several phospholipase D(PLD)genes were downregulated in the tcl1 tcl2 mutant,resulting in a decreased level of the phosphatidic acid(PA)*** of 1-butanol,a competitive substrate inhibitor of PLD-dependent production of PA,attenuated the stress response of the tcl1 tcl2 *** suggests that OsTCL1 and OsTCL2 partially modulate seed germination through the PLD-PA signaling ***,there were alterations in the expression of genes involved in abscisic acid(ABA)biosynthesis,metabolism and signaling transduction in the double *** changes affected the endogenous ABA level and ABA response,thereby influencing seed *** of both 1-butanol and ABA synthesis inhibitor sodium tungstate(Na2WO4)nearly eliminated the differences in stress response between wild type and the tcl1 tcl2 *** indicates that OsTCL1 and OsTCL2 synergistically coordinate seed germination under abiotic stresses through both the PLD-PA signaling and ABA-mediated pathways.

关键词： ABA Drought stress Phospholipase Salt stress Rice

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Stable reverse J-shaped diameter distribution occurs in an old-growth karst forest

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Journal of Forestry Research 2024年第6期35卷 135-147页

作者： Yuanfa Li Jie Li Liting Wei guangxi key laboratory of Forest Ecology and conservation Guangxi Colleges and Universities Key Laboratory for Cultivation and Utilization of Subtropical Forest PlantationCollege of ForestryGuangxi UniversityNanning 530004People’s Republic of China Laibin Jinxiu Dayaoshan Forest Ecosystem Observation and Research Station of guangxi Laibin 545700People’s Republic of China

The reverse J-shaped diameter distribution is considered an inherent attribute of natural forests,cru-cial for forest resource utilization and community ***,in karst regions,intense habitat heterogeneity might alter species composition,spatial distribution,growth,biomass allocation,and mortality processes,yet its impact on diameter structure remains unclear.A fixed plot of 200 m×110 m was established in the Nanpan River Basin,Southwest China,within an old-growth oak forest(>300 years old),and the influence of site substrates(i.e.,rock and soil),topographic factors,sample area,and orientation on diameter distribution was *** on both rock and soil exhibited a reverse-J shape,quantifiable Project funding:This work was supported by the National Natural Science Foundation of China(32060340 and 31400542),the Scientific Research Capacity Building Project for Laibin Jinxiu Dayaoshan Forest Ecosystem Observation and Research Station of guangxi(22-035-130-01).through the Weibull *** substrates had a similar density,approximately 2100 plants/***,the average and range of diameter of trees on rock were smaller than those on soil,suggesting that rock constrains tree *** diameter distribution of trees across microtopography also displayed a reverse-J ***,higher elevations and sunny slopes showed a greater curvature of diameter classes compared to lower elevations and shady slopes,indicating habitat preferences in karst *** area and orientation had minimal effects on diameter class curve that reached stability when the plot size was 6000 *** results suggest that the reverse J-shaped diameter distribution prevails at small scales in karst old-growth forests,encompassing multiple curvatures and spanning forest ecosystems.

关键词： Old-growth forest Diameter distribution Karst Habitat heterogeneity Microtopography

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Identification of a novel planthopper resistance gene from wild rice(Oryza rufipogon Griff.)

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The Crop Journal 2020年第6期8卷 1057-1070页

作者： Meng Yang Jiebin Lin Ling Cheng Hailian Zhou Shu Chen Fang Liu Rongbai Li Yongfu Qiu State key laboratory for conservation and utilization of Subtropical Agro-bioresources Agricultural CollegeGuangxi UniversityNanning 530005GuangxiChina College of Agriculture Yangtze UniversityJingzhou 434025HubeiChina

Rice planthoppers,including brown planthopper(BPH)and white-backed planthopper(WBPH),are the most destructive pests in Asian rice cultivation *** resistance genes that have been mapped and characterized advance our understanding of underlying resistance mechanisms and facilitate the breeding of resistant varieties,thereby contributing to an efficient pest management *** this study,a novel resistance gene Bph38 derived from the wild rice species Oryza rufipogon *** found to confer high resistance to BPH and *** mapping was performed to identify regions associated with BPH and WBPH resistance,and two mapping efforts led to the same region on chromosome 4 flanked by markers RM16563 and ***-segregant analysis and next-generation sequencing were performed using the same population to detect the resistance *** mapping narrowed the region to a 12.3-Mb segment,and fine mapping using BC1 F2 recombinants identified a 79-kb segment flanked by markers YM112 and ***-isogenic lines(NILs)carrying Bph38 in the 9311(indica)and BR54(japonica)genetic backgrounds were developed by crossing and backcrossing with marker-assisted *** agronomic traits and BPH and WBPH resistance of the NILs were similar to those of the recurrent *** feeding and host-choice tests revealed that Bph38 showed both antibiotic and antixenotic effects in both insects,with stronger effects in indica-background *** fine mapping and characterization of the major gene may result in map-based cloning of the gene and allow its application in breeding insectresistant rice varieties.

关键词： Oryza rufipogon Griff. Planthopper resistance Next-generation sequencing-based bulked-segregant analysis Gene mapping Resistance mechanism

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