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柠条正常木与受拉木纤维细胞超微结构及木质素微区分布研究

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中国造纸学报 2009年第4期24卷 15-18页

作者：许凤毛健贞 gwynn ll.jones 孙润仓齐齐哈尔大学北京林业大学材料科学与技术学院教育部木质材料科学与应用重点实验室威尔士大学生物复合材料研究中心北京林业大学材料科学与技术学院教育部木质材料科学与应用重点实验室

采用透射电子显微镜(TEM)、扫描电子显微镜-X射线能谱仪(SEM-EDXA)及共聚焦激光扫描显微镜(CLSM)研究了柠条(Caragana korshinskii)正常木与受拉木纤维细胞的超微结构及木质素在细胞壁中的分布。结果表明,柠条正常木纤维细胞壁分为胞间... 详细信息

采用透射电子显微镜(TEM)、扫描电子显微镜-X射线能谱仪(SEM-EDXA)及共聚焦激光扫描显微镜(CLSM)研究了柠条(Caragana korshinskii)正常木与受拉木纤维细胞的超微结构及木质素在细胞壁中的分布。结果表明,柠条正常木纤维细胞壁分为胞间层(ML)、初生壁(P)、次生壁外层(S1)、次生壁中层(S2)、次生壁内层(S3);而受拉木与正常木不同,其细胞S3层被凝胶层(G层)取代。正常木与受拉木中导管和木射线细胞壁的木质素浓度均比纤维细胞壁的高。正常木纤维细胞各形态区的木质素浓度不同,细胞角隅区的木质素浓度最高,其次是复合胞间层(CML),S2层最低。柠条受拉木纤维细胞壁中除G层未木质化外,与正常木细胞壁各层木质素分布相似。

关键词：柠条受拉木正常木木质素分布

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黑麦草种间杂交育种进展

种子 1995年第1期14卷 61-64页

作者：刘贵林周艺林 M.ll.jones HUMPHEYS 贵州省农业厅畜牧局

商用四倍体多年生黑麦草和意大利三麦草杂交获得稳定杂种。使用宽垄种植选择生产F2系谱的F1代植株，小区种植评价F2系谱的生长与品质性状。19个选择杂种系谱中有10个起源于苏黎世高地的多年生黑麦草，这种在改善早春、夏末和秋季营养生... 详细信息

商用四倍体多年生黑麦草和意大利三麦草杂交获得稳定杂种。使用宽垄种植选择生产F2系谱的F1代植株，小区种植评价F2系谱的生长与品质性状。19个选择杂种系谱中有10个起源于苏黎世高地的多年生黑麦草，这种在改善早春、夏末和秋季营养生长上已证实有影响的亲本，通过增加杂种的水溶性碳水化合物的含量而改善饲用价值。根据这一新的基因资源选择的杂交种Augsta和意大利黑麦草RVP杂种在季节性生长上和品质上都有了显著的改善。

关键词：黑麦草牧草种间杂交育种

Effect of Composts,Lime and Diammonium Phosphate on the Phytoavailability of Heavy Metals in a Copper Mine Tailing Soil

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Pedosphere 2009年第5期19卷 631-641页

作者： M.J.KHAN D.L.jones Department of Soil and Environmental Sciences NWFP Agricultural UniversityPeshawar(Pakistan) School of Agricultural and Forest Sciences University of WalesBangorGwynedd LL57 2UW(UK)

Soil samples from a historic copper mine tailing site at the Parys Mountain,North Wales(UK) were amended with green waste compost(GC),GC+30% sewage sludge(GCS),lime and diammonium phosphate(DAP),to determine the effect of amendments on DTPA-and Ca(NO3)2-extractable metals in the mine tailing and on the phytoavailability of heavy metals by a lettuce(Lactuca sativa L.).Both compost were added at the rate of 10% by weight,lime was added as calcium carbonate equivalent(pH = 7) and DAP at a 2300 mg kg-1 soil *** experiment was arranged in randomised complete design with three replicates in pots under control *** of lime resulted in the largest reduction in metal extractability with DTPA and Ca(NO3)2 and phytoavailability of Cu,Fe and Zn while DAP was effective in lowering Pb extractability and *** exception of Zn,all other metals extracted decreased with time after amendment *** distribution of heavy metals between and within the four procedures of potentially bioavailable sequential extraction(PBASE) varied significantly(P < 0.001).Stronger relationships were noted between the metals extracted with PBASE SE1 and Cu,Pb(P < 0.01) and Fe(P < 0.001) in the *** results indicate that addition of lime is sufficient to restore the vegetative cover to a high metal mine waste while DAP is good for stabilizing Pb,but its detrimental role on plant growth and the risk associated with presence of N in DAP(through N leaching) may restrict its chances for remediation of contaminated sites.

关键词： lettuce metal uptake potentially bioavailable sequential extraction

Response of nitrogen fractions in the rhizosphere and bulk soil to organic mulching in an urban forest plantation

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Journal of Forestry Research 2021年第6期32卷 2577-2588页

作者： Xiaodan Sun Gang Wang Yuqian Ye Qingxu Ma Qingwei Guan Davey L.jones College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037People’s Republic of China Co-Innovation Center for Sustainable Forestry in Southern China Nanjing 210037People’s Republic of China School of Natural Sciences Bangor UniversityBangor LL572UWGwyneddUK

Nitrogen is an essential component in forest ecosystem nutrient *** fractions,such as dissolved nitrogen,ammonium,nitrate,and microbial biomass nitrogen,are sensitive indicators of soil nitrogen pools which affect soil fertility and nutrient ***,the responses of nitrogen fractions in forest soils to organic mulching are less well *** rhizosphere is an important micro-region that must be considered to better understand element cycling between plants and the soil.A field investigation was carried out on the effect of mulching soil in a 15-year-old Ligustrum lucidum urban *** in total nitrogen and nitrogen fractions in rhizosphere and bulk soil in the topsoil(upper 20 cm)and in the subsoil(20-40 cm)were evaluated following different levels of mulching,in addition to nitrogen contents in fine roots,leaves,and organic *** relationships between nitrogen fractions and other measured variables were *** mulching had no significant effect on most nitrogen fractions except for the rhizosphere microbial biomass nitrogen(MBN),and the thinnest(5 cm)mulching layer showed greater effects than other *** MBN was more sensitive to mulching compared to bulk soil,and was more affected by soil environmental *** and soil depth had more pronounced effects on nitrogen fractions than *** nitrogen and dissolved nitrogen were correlated to soil phosphorus,whereas other nitrogen fractions were strongly affected by soil physical properties(temperature,water content,bulk density).Mulching also decreased leaf nitrogen content,which was more related to soil nitrogen fractions(except for MBN)than nitrogen contents in either fine roots or organic *** applications of small quantities of organic mulch contribute to nitrogen transformation and utilization in urban forests.

关键词： Rhizosphere Nitrogen fraction Organic mulching Soil–plant interaction Urban plantation forest

Organic mulching promotes soil organic carbon accumulation to deep soil layer in an urban plantation forest

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Forest Ecosystems 2021年第1期8卷 11-21页

作者： Xiaodan Sun Gang Wang Qingxu Ma Jiahui Liao Dong Wang Qingwei Guan Davey L.jones College of Biology and Environment Nanjing Forestry UniversityNanjing 210037China Co-Innovation Center of Sustainable Forestry in Southern China Nanjing 210037China School of Natural Sciences Bangor UniversityGwynedd LL572UWUK College of Environmental Science and Engineering China West Normal UniversityNanchong 637000China UWA School of Agriculture and Environment The University of Western AustraliaPerthWA 6009Australia

Background:Soil organic carbon(SOC)is important for soil quality and fertility in forest *** SOC fractions are sensitive to environmental changes,which reflect the impact of short-term internal and external management measures on the soil carbon *** mulching(OM)alters the soil environment and promotes plant ***,little is known about the responses of SOC fractions in rhizosphere or bulk soil to OM in urban forests and its correlation with carbon composition in ***:A one-year field experiment with four treatments(OM at 0,5,10,and 20 cm thicknesses)was conducted in a 15-year-old Ligustrum lucidum *** in the SOC fractions in the rhizosphere and bulk soil;the carbon content in the plant fine roots,leaves,and organic mulch;and several soil physicochemical properties were *** relationships between SOC fractions and the measured variables were ***:The OM treatments had no significant effect on the SOC fractions,except for the dissolved organic carbon(DOC).OM promoted the movement of SOC to deeper soil because of the increased carbon content in fine roots of *** were significant correlations between DOC and microbial biomass carbon and SOC and easily oxidised organic *** OM had a greater effect on organic carbon fractions in the bulk soil than in the *** thinnest(5 cm)mulching layers showed the most rapid carbon decomposition over *** time after OM had the greatest effect on the SOC fractions,followed by soil ***:The frequent addition of small amounts of organic mulch increased SOC accumulation in the present *** is a potential management model to enhance soil organic matter storage for maintaining urban forest productivity.

关键词： Soil organic carbon Labile organic carbon fractions Rhizosphere Urban plantation forest Organic mulching

Dynamics of Nitrogen Speciation in Horticultural Soils in Suburbs of Shanghai,China

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Pedosphere 2010年第2期20卷 261-272页

作者： GE Ti-Da HUANG Dan-Feng P. ROBERTS D. L. jones SONG Shi-Wei School of Agriculture and Biology Shanghai Jiao Tong University Shanghai 201101 (China) School of the Environment and Natural Resources University of Wales Bangor Gwynedd LL57 2UW (UK) Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical Agriculture Chinese Academyof Sciences Hunan 410125 (China)

Dissolved organic nitrogen （DON） represents a significant pool of soluble nitrogen （N） in soil ecosystems. Soil samples under three different horticultural management practices were collected from the Xiaxiyang Organic Vegetable and Fruit Farm, Shanghai, China, to investigate the dynamics of N speciation during 2 months of aerobic incubation, to compare the effects of different soils on the mineralization of ^14C-labeled amino acids and peptides, and to determine which of the pathways in the decomposition and subsequent ammonification and nitrification of organic N represented a significant blockage in soil N supply. The dynamics of N speciation was found to be significantly affected by mineralization and immobilization. DON, total free amino acids, and NH^＋-N were maintained at very low levels and did not accumulate, whereas NO3^--N gradually accumulated in these soils. The conversion of insoluble organic N to low-molecular-weight （LMW） DON represented a main constraint to N supply, while conversions of LMW DON to NH4^＋-N and NH4^＋-N to NO3^--N did not. Free amino acids and peptides were rapidly mineralized in the soils by the microbial community and consequently did not accumulate in soil. Turnover rates of the additional amino acids and peptides were soil-dependent and generally followed the order of organic soil 〉 transitional soil 〉 conventional soil. The turnover of high-molecular-weight DON was very slow and represented the major DON loss. Further studies are needed to investigate the pathways and bottlenecks of organic N degradation.

关键词： amino acids dissolved organic N mineralization N transformation peptides

G protein controls stress readiness by modulating transcriptional and metabolic homeostasis in Arabidopsis thaliana and Marchantia polymorpha

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Molecular Plant 2022年第12期15卷 1889-1907页

作者： Ting-Ying Wu Shalini Krishnamoorthi Kulaporn Boonyaves Isam Al-Darabsah Richalynn Leong Alan M.jones Kimitsune Ishizaki Kang-Ling Liao Daisuke Urano Temasek Life Sciences Laboratory SingaporeSingapore Department of Mathematics University of ManitobaWinnipegMBCanada Singapore-MIT Alliance for Research and Technology SingaporeSingapore Department of Biological Sciences National University of SingaporeSingapore 117558Singapore Departments of Biology and Pharmacology University of North CarolinaChapel HillNCUSA Graduate School of Science Kobe UniversityKobeHyogo 657-8501Japan

The core G protein signaling module,which consists of Gαand extra-large Gα(XLG)subunits coupled with the Gβγdimer,is a master regulator of various stress *** this study,we compared the basal and salt stress-induced transcriptomic,metabolomic and phenotypic profiles in Gα,Gβ,and XLG-null mutants of two plant species,Arabidopsis thaliana and Marchantia polymorpha,and showed that G protein mediates the shift of transcriptional and metabolic homeostasis to stress readiness *** demonstrated that such stress readiness serves as an intrinsic protection mechanism against further stressors through enhancing the phenylpropanoid pathway and abscisic acid ***,WRKY transcription factors were identified as key intermediates of G protein-mediated homeostatic *** and mathematical model comparisons between *** and *** revealed evolutionary conservation of transcriptional and metabolic networks over land plant evolution,whereas divergence has occurred in the function of plant-specific atypical XLG *** together,our results indicate that the shifts in transcriptional and metabolic homeostasis at least partially act as the mechanisms of G protein-coupled stress responses that are conserved between two distantly related plants.

关键词： homeostatic adjustments transcriptional regulation metabolic regulation heterotrimeric G protein evolutionary conservation

Surgical management of the diabetic foot:The current evidence

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World Journal of Orthopedics 2024年第5期15卷 404-417页

作者： Richard Henry Randall Roberts Gareth Rhys Davies-jones James Brock Vaishnav Satheesh Greg AJ Robertson Department of Trauma and Orthopaedics Wrexham Maelor HospitalWrexham LL137TDUnited Kingdom Department of Trauma and Orthopaedics The Robert Jones and Agnes Hunt Orthopaedic HospitalOswestry SY107AGUnited Kingdom

The prevalence of diabetes mellitus and its associated complications,particularly diabetic foot pathologies,poses significant healthcare challenges and economic burdens *** review synthesises current evidence on the surgical management of the diabetic foot,focusing on the interplay between neuropathy,ischemia,and infection that commonly culminates in ulcers,infections,and,in severe cases,*** escalating incidence of diabetes mellitus underscores the urgency for effective management strategies,as diabetic foot complications are a leading cause of hospital admissions among diabetic patients,significantly impacting morbidity and mortality *** review explores the pathophysiological mechanisms underlying diabetic foot complications and further examines diabetic foot ulcers,infections,and skeletal pathologies such as Charcot arthropathy,emphasising the critical role of early diagnosis,comprehensive management strategies,and interdisciplinary care in mitigating adverse *** addressing surgical interventions,this review evaluates conservative surgeries,amputations,and reconstructive procedures,highlighting the importance of tailored approaches based on individual patient profiles and the specific characteristics of foot *** integration of advanced diagnostic tools,novel surgical techniques,and postoperative care,including offloading and infection control,are discussed in the context of optimising healing and preserving limb function.

关键词： Diabetes Diabetic foot Charcot Osteomyelitis Amputation Diabetic foot attack Conservative surgery

Fate of low-molecular-weight organic phosphorus compounds in the P-rich and P-poor paddy soils

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Journal of Integrative Agriculture 2021年第9期20卷 2526-2534页

作者： LI Bao-zhen Anna GUNINA Mostafa ZHRAN Davey L.jones Paul W.HIll HU Ya-jun GE Ti-da WU Jin-shui Key Laboratory of Agro-ecological Processes in Subtropical Region/Changsha Research Station for Agricultural&Environmental Monitoring Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125P.R.China Department of Environmental Chemistry University of KasselNordbahnhofstrae 1a 37213WitzenhausenGermany Department of Soil Biology and Biochemistry Dokuchaev Soil Science InstituteMoscow 119017Russian Federation Soil and Water Research Department Nuclear Research CenterAtomic Energy AuthorityAbou-Zaabl 13759Egypt School of Natural Sciences Bangor UniversityBangorGwynedd LL572UWUK University of Chinese Academy of Sciences Beijing 100049P.R.China

Continuous application of organic fertilizers can cause accumulation of organic phosphorus(P)in soil,especially in the lowmolecular-weight organic phosphorus(LMWOP)*** organic P pool represents a potentially important source of P for both plants and *** understand the effect of long-term fertilization(30 years)(P-rich soil)***(P-poor soil)on the bioavailability and fate of LMWOP in subtropical paddy soils,we determined the sorption and mineralization of 14 C-labeled adenosine,adenosine monophosphate(AMP),adenosine diphosphate(ADP),and adenosine triphosphate(ATP)in each *** contents of carbon,nitrogen,and P in the P-rich soil were more than two times greater than those in the P-poor *** mineralization rates of the LMWOP compounds were faster in the P-rich soil compared to the P-poor soil,and followed the order AMP>ADP>*** sterilized soil,all forms of adenosine-P were strongly sorbed to the solid phase and reached saturation in a short time,with the adsorbance increasing with the number of phosphate *** concluded that the mineralization of LMWOP compounds was repressed slightly by sorption to the solid phase,but only in the short ***,LMWOP compounds serve as readily available sources of C for microorganisms,making P available for themselves as well as for the ***,P accumulation and the progressive saturation of the P sorption sites in highly fertile soils may increase the potential risk of P runoff.

关键词： rice paddy phosphatase phosphorus cycling microbial community