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Combining ectomycorrhizal fungi and plant growth-promoting rhizobacteria to enhance salt tolerance of Metasequoia glyptostroboides

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Journal of forestry research 2023年第5期34卷 1603-1614页

作者： Weiliang Kong Xiuqian Xu Zhenqian Li Yahui Wang Xiaoqin Wu Co-Innovation centre for Sustainable forestry in Southern China College of ForestryNanjing Forestry UniversityNanjing 210037People’s Republic of China Jiangsu Key Laboratory for Prevention and Management of Invasive Species Nanjing Forestry UniversityNanjing 210037People’s Republic of China

Plant growth and productivity are negatively affected by soil *** study investigated the effects of the rhizosphere-promoting bacterium,Bacillus paramycoides JYZ-SD5,and the ectomycorrhizal fungus,Schizophyllum commune Be,on the growth of Metasequoia glyptostroboides under salt *** in biomass,root growth,root ion distribution and in vivo enzyme activities were determined under different treatments(Be,JYZ-SD5,and Be+JYZ-SD5).The results show that all inoculations increased chlorophyll content,shoot length and root diameter with or without salt stress,and the effect of Be+JYZ-SD5was the ***-SD5 and Be+JYZ-SD5 treatments significantly increased root length,surface area,bifurcation number,tip number,main root length and diameter under salt *** chloroplast structures developed under both single and double *** to the control,root activities of *** in the Be,JYZSD5,and Be+JYZ-SD5 treatments increased by 31.3%,17.2%,and 33.7%.All treatments increased the activities of superoxide dismutase(SOD),peroxidase(POD),Na^(+)-K^(+)-ATPase and Ca^(2+)-Mg^(2+)-*** strongest effect was by Be+*** of root ion distribution showed that,under salt stress,Na^(+)and K^(+)decreased and were concentrated in the epidermis or ***/K ratios also *** Be+JYZ-SD5 treatment increased betaine by 130.3%and 97.9%under 50 mM and 100 mM salt stress,***,these changes result in the activation of physiological and biochemical processes involved in the mitigation of salinity-induced stress in ***.

关键词： Bacillus paramycoides Schizophyllum commune Metasequoia glyptostroboides Salt stress Plant growth

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QMEC:a tool for high-throughput quantitative assessment of microbial functional potential in C,N,P,and S biogeochemical cycling

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Science China(Life Sciences) 2018年第12期61卷 1451-1462页

作者： Bangxiao Zheng Yongguan Zhu Jordi Sardans Josep Penuelas Jianqiang Su Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Consejo Superior de lnvestigaciones Cientificas (CSIC) Global Ecology UnitCentre for Ecological Research and Forestry Applications (CREAF)-CSIC-Universitat Autonoma de Barcelona (UAB)BeUaterra 08193Spain CREAF Cerdanyola del VallesBarcelona 08193Spain State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of Sciences Bering 100085China

Microorganisms are major drivers of elemental cycling in the biosphere. Determining the abundance of microbial functional traits involved in the transformation of nutrients, including carbon(C), nitrogen(N), phosphorus(P) and sulfur(S), is critical for assessing microbial functionality in elemental cycling. We developed a high-throughput quantitative-PCR-based chip, Quantitative microbial element cycling(QMEC), for assessing and quantifying the genetic potential of microbiota to mineralize soil organic matter and to release C, N, P and S. QMEC contains 72 primer pairs targeting 64 microbial functional genes for C, N, P, S and methane metabolism. These primer pairs were characterized by high coverage(average of 18–20 phyla covered per gene)and sufficient specificity(>70% match rate) with a relatively low detection limit(7–102 copies per run). QMEC was successfully applied to soil and sediment samples, identifying significantly different structures, abundances and diversities of the functional genes(Pecological processes and biogeochemical cycles in various environmental contexts including those of the current global change.

关键词： microbial genes functional potential high-throughput qPCR elemental cycling biogeochemical cycle ecological process

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An integrated assessment approach to optimal forest bioenergy production for young Scots pine stands

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Forest Ecosystems 2015年第3期2卷 220-229页

作者： Tianjian Cao Kari Hyytiainen Henna Hurttala Lauri Valsta Jerome K.Vanclay College of forestry Northwest A&F University Department of Economics and Management University of Helsinki Department of Forest Sciences Forest research centre Southern Cross University

Background: Bioenergy is re-shaping opportunities and imperatives of forest management. This study demonstrates,through a case study in Scots pine(Pinus sylvestris L.), how forest bioenergy policies affect stand management ***: Optimization studies were examined for 15 Scots pine stands of different initial stand densities, site types, and temperature sum regions in Finland. Stand development was model ed using the Pipe Qual stand simulator coupled with the simulation-optimization tool Opti For Bioenergy to assess three forest bioenergy policies on energy wood harvest from early ***: The optimal solutions maximizing bare land value indicate that conventional forest management regimes remain optimal for sparse stands. Energy harvests occurred only when profitable, led to lower financial returns. A forest bioenergy policy which included compulsory energy wood harvesting was optimal for denser stands. At a higher interest rate(4 %), increasing energy wood price postponed energy wood harvesting. In addition, our results show that early thinning somewhat reduced wood quality for stands in fertile sites. For less fertile sites, the changes were ***: A constraint of profitable energy wood harvest is not rational. It is optimal to carry out the first thinning with a flexible forest bioenergy policy depending on stand density.

关键词： Energy wood Policy design Precommercial thinning Scots pine Simulation-optimization

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Predicting the upper stem diameters and volume of a tropical dominant tree species

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Journal of forestry research 2022年第6期33卷 1725-1737页

作者： Sunita Ulak Keshav Ghimire Rabindra Gautam Shes Kanta Bhandari Krishna Prasad Poudel Yajna Prasad Timilsina Dhirendra Pradhan Thakur Subedi Forest research and Training centre KathmanduNepal Institute of forestry Tribhuvan UniversityKathmanduNepal School of Biological Sciences The University of Western AustraliaPerthAustralia Department of forestry Mississippi State UniversityMississippi StatePO Box 9681Starkville 39762USA

Predicting upper stem diameters and individual tree volumes is important for product quantification and can provide important information for the sustainable management of forests of important commercial tree species(Shorea robusta)in *** aim of this study was to develop a taper equation for ***-four trees were selected and felled in the southern low land of Nepal.A mixed effect modelling approach was used to evaluate 17 different taper functions.‘Leave-one-out cross-validation'was used to validate the fitted taper *** variable exponent taper function best fitted our data and described more than 99%of the variation in upper stem *** also showed significant effects of stand density on tree *** tree volume prediction using the local volume model developed in this study was more accurate compared to the volume predicted through the taper function and existing volume *** taper function developed in this study provides the benefit of predicting upper stem diameter and can be used for predicting volume to any merchantable height of individual *** will have implications in estimates of volume,biomass,and carbon and thus may be a potential supporting tool in carbon trade and revenue generation.

关键词： Mixed-model approach Shorea robusta Taper Volume Nepal

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Identifying potential flavonoid biosynthesis regulator in Zanthoxylum bungeanum Maxim. by genome-wide characterization of the MYB transcription factor gene family

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Journal of Integrative Agriculture 2022年第7期21卷 1997-2018页

作者： WANG Xiang-yuan TIAN Lu FENG Shi-jing WEI An-zhi College of forestry Northwest A&F UniversityYangling 712100P.R.China research centre for Engineering and Technology of Zanthoxylum State forestry Administration Yang ling 712100P.R.China College of forestry Guizhou UniversityGuiyang 550025P.R.China

Plant MYB transcription factors(TFs) play crucial roles in regulating the biosynthesis of flavonoids but current analysis on their role in Zanthoxylum bungeanum Maxim.(ZBM) is far from comprehensive. In this study, we identified 270 MYB genes in ZBM and divided them into four subfamilies. The R2 R3-MYB(ZbMYB) category contained 251 genes and was classified into 33 subfamilies according to their phylogenetic results and sequence similarity. These subfamilies included 24 subgroups containing both MYBs of ZBM plants and AtMYBs, and nine subgroups containing only ZBM MYBs or AtMYBs. ZbMYBs with similar functions clustered into the same subgroup, indicating functional conservation. The subcellular localization analysis predicted that most ZbMYB genes were found in the nucleus. The transposed duplications appeared to play a major role in the expansion of the MYB gene family in ZBM. Through phylogenetic analysis and transcriptome profiling, it was found that 28 ZbMYB genes may regulate the biosynthesis of flavonoids in ZBM, and these genes expression presented distinct temporal and spatial expression patterns. In different fruit development stages of ZBM, the expression patterns of EVM0042160 and EVM0033809 genes obtained by qRT-PCR analysis are very similar to the flavonoid and anthocyanin content curves in ZBM. Further correlation analysis showed that the content of flavonoids in different fruit development stages and the transcript abundance levels of 28 ZbMYB genes have different degrees of correlation relationship. These results indicated that the ZbMYB genes might be involved in the flavonoid metabolic pathway. This comprehensive and systematic analysis of MYB family genes provided a solid foundation for further functional analysis of MYB TFs in ZBM.

关键词： Zanthoxylum bungeanum Maxim. MYB transcription factor expression pattern regulation of flavonoid biosynthesis

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Conservation genetics of a resident population of Greylag Goose(Anser anser) at the southernmost limit of the species' distribution in Europe

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Avian research 2019年第1期10卷 53-62页

作者： Anastasios Bounas Giorgos Catsadorakis Annita Logotheti Berend Voslamber Antonios Magoulas Dimitris Tsaparis Molecular Ecology and Conservation Genetics Lab Department of Biological Applications and TechnologyUniversity of Ioannina Society for the Protection of Prespa Sovon Dutch centre for Field Ornithology Institute of Marine Biology Biotechnology and Aquaculture(IMBBC)Hellenic Centre for Marine Research(HCMR)

Background:Conservation of small and isolated populations can be challenging since they are prone to loss of genetic diversity due to random genetic drift and ***,information from the assessment of genetic diversity and structure are needed for conservation programs to determine the appropriate management strategy for the *** investigated the levels of genetic variability in a resident Greylag Goose(Anser anser) population,the southernmost breeding population of the species in Europe and the sole viable population of any goose species in ***:A fragment of mtDNA Control Region and a panel of 11 microsatellite markers were used to search for any signs of genetic impoverishment and population substructure and to reveal the underlying processes through the identification of possible past demographic ***:The population was found to be monomorphic in the amplified fragment of the mitochondrial Control Region,with all individuals sharing a single private *** showed a lack of any population substructure indicating a panmictic *** the population seems to have experienced a strong and recent genetic bottleneck and exhibits a small effective population size,we did not find evidence of either extremely low levels of genetic diversity or inbreeding ***:The recent demographic decline we detected and the combined influence of residency and anthropogenic factors have probably shaped the current genetic *** study population does not need emergency conservation actions but should be regarded as a discrete management *** management strategies should focus on population and genetic monitoring and preventing further abundance declines that would increase the risk of genetic impoverishment.

关键词： Conservation Genetic variability Inbreeding Isolation Management units Microsatellites mtDNA Nonmigratory population

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Study on phosphorus loss and influencing factors in the water source area

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International Soil and Water Conservation research 2022年第2期10卷 324-334页

作者： Rongjia Wang Chunju Cai Jianfeng Zhang Shiyong Sun Handan Zhang Institute of Subtropical forestry Chinese Academy of ForestryHangzhou311400PR China Nanjing forestry University Nanjing210037PR China International centre for Bamboo and Rattan Beijing100102PR China

Maintaining drinking water security is a global issue,and phosphorus is a limiting factor affecting drinking water ***,this study took Fushi Reservoir as a test area,and set up field runoff observation plots around the reservoir catchment,which is covered by moso bamboo *** field observation,the vertical variation of phosphorus loss in different stands of moso bamboo was initially *** results showed that:(1)For the vertical dimensions(atmospheric rainfall,stemflow,throughfall,surface runoff)from high to low,the loss of total phosphorus(TP)increased,and the pro-portion of dissolved phosphorus increased from 29.29%(atmospheric rainfall)to 62.76%(surface runoff).(2)Different rainfall factors had various impacts on phosphorus loss at the different vertical *** accumulation of rainfall had the greatest impact on surface runoff TP loss,with the correlation coefficient reaching 0.994(P<0.01),while surface runoff particulate phosphorus loss was mostly affected by the average rainfall intensity.(3)Modifying the forest structure in water source areas can reduce the loss of TP via stemflow and throughfall,but the effect on surface runoff TP loss is ***,it is expected that this novel study can serve as a reference for improving the environmental quality of water source areas,and help in reducing phosphorus loss and controlling non-point source pollution.

关键词： Phosphorus loss Water source area Non-point source pollution Moso bamboo stand

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Within-and between-population variations in seed and seedling traits of Juglans mandshurica

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Journal of forestry research 2022年第4期33卷 1175-1186页

作者： Qinhui Zhang Shihe Yu Xiaona Pei Qianchun Wang Aijun Lu Ying Cao Mulualem Tigabu Jian Feng Xiyang Zhao State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China Liaoning Academy of Forest Science Shenyang 110032People’s Republic of China State Administration of forestry and Grassland Harbin Research Institute of Forestry MachineryHarbin 150086People’s Republic of China research Center of Cold Temperate forestry CAFHarbin 150086People’s Republic of China forestry Development and Service Center of Liaoning Shenyang 110032People’s Republic of China Southern Swedish Forest research centre Swedish University of Agricultural SciencesPO Box 4923053 AlnarpSweden

In order to quantify within-and between-population variation in seed and seedling traits of Juglans mandshurica and reveal the relationship among genetic and environmental variations and select elite families,samples of 50 *** families from five natural populations in Liaoning Province,northeast China,were taken to measure seed and seedling *** results show that all seed traits varied significantly among families within the population,but only kernel weight and kernel rate showed significant variations among *** values of single seed weight,length,width,lateral diameter,and average size,and kernel weight and rate were 10.1 g,43.0 mm,29.2 mm,28.1 mm,33.4 mm,and 2.2 g and 22.5%,*** variations were observed in seedling height and root collar diameter among families and interaction between families and blocks,but the block effects on height and root collar diameter were *** values of height and root collar diameter were 94.0 cm and 8.7 mm,*** heritability of traits ranged from 0.6 gm(kernel weight)to 0.9 mm(seedling height).Correlation analysis showed a strong relationship among seed traits but a weak correlation between seed and seedling *** analysis grouped the five natural populations of *** into three significant clusters with different *** general combining ability analysis showed that most traits in one family(WD11)were higher,suggesting parental traits were excellent for selecting elite parent *** the comprehensive evaluation method,five families with better seed traits and five families with better seedling traits were selected as elite materials with 10%selection *** genetic gains of these elite materials for seed weight,kernel weight,average seed size,kernel rate,seedling height,and root collar diameter were 13.1%,10.3%,4.1%,2.4%,29.7%,and 21.1%,respectively.

关键词： General combining ability Heritability Comprehensive evaluation Genetic gain

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Drosophila X virus-like particles as delivery carriers for improved oral insecticidal efficacy of scorpion Androctonus australis peptide against the invasive fruit fly,Drosophila suzukii

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Insect Science 2024年第3期31卷 847-858页

作者： Qi Xue Luc Swevers Clauvis Nji Tizi Taning Faculty of Bioscience Engineering Department of Plants and CropsGhent UniversityGhentBelgium Insect Molecular Genetics and Biotechnology Institute of Biosciences and ApplicationsNational Centre for Scientific Research"Demokritos"AthensGreece

Insect-specific neurotoxic peptides derived from the venoms of scorpions and spiders can cause acute paralysis and death when injected into insects,offering a promising insecticidal component for insect pest ***,effective delivery systems are required to help neurotoxic peptides pass through the gut barrier into the hemolymph,where they can ***,we investigated the potential of a novel nanocarrier,Drosophila X virus-like particle(DXV-VLP),for delivering a neurotoxin from the scorpion Androctonus australis Hector(AaIT)against the invasive pest fruit fly,Drosophila *** results show that the fusion proteins of DXV polyproteins with AalT peptide at their Ctermini could be sufficiently produced in Lepidoptera Hi5 cells in a soluble form using the recombinant baculovirus expression system,and could self-assemble into VLPs with similar particle morphology and size to authentic DXV *** addition,the AalT peptides displayed on DXV-VLPs retained their toxicity,as demonstrated in injection bioassays that resulted in severe mortality(72%)in adults after 72 *** fed to adults,mild mortality was observed in the group treated with DXV-AalT(38%),while no mortality occurred in the group treated with AaIT peptide,thus indicating the significant role of DXV-VLPs in delivering AalT ***,this proof-of-concept study demonstrates for the first time that VLPs can be exploited to enhance oral delivery of insect-specific neurotoxic peptides in the context of pest ***,it provides insights for further improvements and potentially the development of neurotoxin-based bioinsecticides and/or transgenic crops for insect pest control.

关键词： AalT Drosophila suzuki nanocarrier neurotoxic peptides pest control virus-like particle(VLP)

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Modelling monthly soil losses and sediment yields in Cyprus

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International Journal of Digital Earth 2016年第8期9卷 766-787页

作者： Christos G.Karydas Panos Panagos School of Agriculture forestry and Natural Environment Aristotle University of ThessalonikiThessalonikiGreece European Commission Joint Research CentreInstitute of Environment and SustainabilityIspraVAItaly

The aim of this study was to map soil erosion on the Mediterranean island of *** G2 model,an empirical model for month-time step erosion assessments,was *** losses in Cyprus were mapped at a 100 m cell size,while sediment yields at a sub-basin scale of 0.62 km^(2) mean *** results indicated a mean annual erosion rate of 11.75 t ha^(−1)y−^(1),with October and November being the most erosive *** 34%of the island’s surface was found to exceed non-sustainable erosion rates(>10 t ha^(−1)y−^(1)),with sclerophyllous vegetation,coniferous forests,and non-irrigated arable land being the most extensive non-sustainable erosive land *** mean sediment delivery ratio(SDR)was found to be 0.26,while the mean annual specific sediment yield(SSY)value for Cyprus was found to be 3.32 t ha^(−1)y−^(1).The annual sediment yield of the entire island was found to be 2.746 Mt y−*** study was the first to provide complete and detailed erosion figures for Cyprus at a country *** geodatabase and all information records of the study are available at the European Soil Data centre(ESDAC)of the Joint research centre(JRC).

关键词： Soil erosion G2 model USLE Gavrilovic digital earth

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