Two new megastigmane O-glucopyranosides, named （2R,3R,5R,6S,9R）-3-hydroxy-5,6-epoxy-β-ionol-2-O-β-D-glucopyrano- side （1） and （2R,3R,5R,6S,9R）-3-hydroxyl-5,6-epoxy-acety-β-ionol-2-O-β-D-glucopyranoside （2）...Two new megastigmane O-glucopyranosides, named （2R,3R,5R,6S,9R）-3-hydroxy-5,6-epoxy-β-ionol-2-O-β-D-glucopyrano- side （1） and （2R,3R,5R,6S,9R）-3-hydroxyl-5,6-epoxy-acety-β-ionol-2-O-β-D-glucopyranoside （2） together with six known mega- stigmanes, were isolated from the leaves of Broussonetia papyrifera （Linn.） Vent. Their structures were established by chemical methods and spectroscopic techniques including 2D NMR.展开更多
Paper mulberry (Broussonetia papyrifera) is one of multifunctional species in agroforestry systems as well as one of traditional forages in many countries of Asia. Fully expanded tender leaves of B. papyrifera wildly ...Paper mulberry (Broussonetia papyrifera) is one of multifunctional species in agroforestry systems as well as one of traditional forages in many countries of Asia. Fully expanded tender leaves of B. papyrifera wildly growing under two traffic densities (a high traffic loads bearing more than 1000 vehicles per hour, HT;and a relatively clear section with almost no traffic loads, NT) were collected for carbohydrates, amino acids and phytohormones analysis. Leaves exposed to traffic pollutants were revealed to have significant lower amounts of carbohydrates and total amino acids than those growing at relatively clear environment. The levels of abscisic acid in the leaves significantly increased, while gib-berellin acid, indoleaetic acid, and zeatin riboside in the leaves significantly decreased, with the traffic densities. The results indicated that the contents of carbohydrates, amino acids and phytohormones in the leaves of B. papyrifera could be adversely affected by traffic pollution. Variations of the leaf biochemistries of B. papyrifera exposed to traffic pollutants implied that B. papyrifera could physiologically regulate itself to adapt or resist traffic stress.展开更多
A new favane,bropapyriferol(1),and eleven known ones were isolated from the EtOAc part of Broussonetia papyrifera under the guidance of bioassay.The structure of compound 1 was determined by extensive 1D and 2D NMR,[...A new favane,bropapyriferol(1),and eleven known ones were isolated from the EtOAc part of Broussonetia papyrifera under the guidance of bioassay.The structure of compound 1 was determined by extensive 1D and 2D NMR,[α]_(D) spectroscopic data and quantum computation.Daphnegiravan F(2)and 5,7,3′,4′-tetrahydroxy-3-methoxy-8,5′-diprenylfavone(3)showed signifcantly anti-oral microbial activity against fve Gram-positive strains and three Gram-negative strains in vitro.Especially,compound 3 was more potent in suppressing Actinomyces naeslundii and Porphyromonas gingivalis(MIC=1.95 ppm)than the positive control,triclosan.展开更多
The purpose of this study was to evaluate the effects of Broussonetia papyrifera(paper mulberry)invasion and land use on the floristic composition of a dry semideciduous forest in Ghana.Forty-five plots(25 m×25 m...The purpose of this study was to evaluate the effects of Broussonetia papyrifera(paper mulberry)invasion and land use on the floristic composition of a dry semideciduous forest in Ghana.Forty-five plots(25 m×25 m each),distributed among three land uses-selectively logged(SL);abandoned farmlands(AF);and an undisturbed reference(RF)-were surveyed.Results showed lower tree species richness(S),diversity(H’),evenness(S)and basal area(BA)in the SL(46,0.78,0.32 and 269.12 m2 ha-1,respectively)and AF(40,0.53,0.45,and 131.16 m^2 ha^-1)sites compared to the RF site(79,2.66,0.87,963.72 m^2 ha^-1).Similar patterns were found at the shrub layer,but no differences were observed at the herb layer.Non-metric multidimensional scaling ordination revealed distinct species composition among the land uses.The two disturbed habitats,SL and AF,were associated with increased B.papyrifera invasion particularly in the overstory,with importance value index and mean relative density of 45 and 65.03%,and 42 and 53.29%,correspondingly.However,the species was only sparsely represented in the RF site.Tree density of B.papyrifera correlated negatively with H’,S,E,BA,and native tree density and richness.These findings highlight the strong link between human land use(i.e.,logging and slash-andburn farming),invasion,and vegetation characteristics,and suggest the need to limit these disturbances to conserve biodiversity within tropical forest ecosystems.展开更多
Broussonetia kazinoki×Broussonetia papyrifera(ZJGS)is a hybrid species in Moraceae family,which has a very complicated hybrid origin.The excellent characteristics of fast growth,strong soil and water conservation...Broussonetia kazinoki×Broussonetia papyrifera(ZJGS)is a hybrid species in Moraceae family,which has a very complicated hybrid origin.The excellent characteristics of fast growth,strong soil and water conservation ability,high leaf protein content and stem fiber content in ZJGS make it both ecological benefits in the mining area and economically valuable.This study aims to further understand ZJGS and other Moraceae taxa through the ZJGS chloroplast(cp)genome structure and the comparison with 12 closely related Moraceae species.Among the 13 Moraceae species,the cp genome length of seven Broussonetia species(ranges from 160,239 bp to 162,594 bp)is larger than that of six Morus species(ranges from 158,459 bp to 159,265 bp).Among the 77 shared protein-coding genes(PCGs)in Moraceae species,the obvious positive selection of Ka/Ks ratios acted on petD and rpl16 genes of B.kazinoki and B.papyrifera,respectively.Phylogenetic analysis based on shared PCGs from 28 species shows that ZJGS is closely related to maternal B.kazinoki.These findings provide data support for the origin of ZJGS hybridization and provide genomic resources for future ZJGS resource development and molecular breeding.展开更多
In this study,the discrete element software EDEM was applied to establish a simulation model of non-uniform-sized particle units for Broussonetia papyrifera stalks,which aimed to address the low utilization rate of ex...In this study,the discrete element software EDEM was applied to establish a simulation model of non-uniform-sized particle units for Broussonetia papyrifera stalks,which aimed to address the low utilization rate of existing Broussonetia papyrifera harvesting machinery,the significant variation between the simulated model of Broussonetia papyrifera stalks and their actual appearance,as well as the absence of contact parameter calibration.Through a combination of the free-fall collision method,inclined plane sliding method,and inclined plane rolling method,numerical simulation was conducted to analyze the pattern of variations in contact parameters between Broussonetia papyrifera stalks and the steel material of the machinery.Accordingly,these parameters were calibrated.The results showed that the coefficient of restitution between Broussonetia papyrifera stalks and steel materials was 0.321,the static friction factor was 0.589,and the rolling friction factor was 0.078.With the parameters of contact between Broussonetia papyrifera stalks as variables and the experimentally measured pile angle as the objective of optimization,the steepest ascent experiment and the three-factor five-level rotation combination experiment were conducted.In this way,a second-order response model was constructed to analyze the relationship between the contact parameters and the pile angle.Through the optimization analysis of experimental data,it was determined that the coefficient of restitution between Broussonetia papyrifera stalks was 0.21,the static friction factor was 0.24,and the rolling friction factor was 0.03.Furthermore,the calibration results were validated through experimentation to show that the relative error between the obtained pile angle under the context of optimal parameter combination and the actual one was 4.11%.In addition,the relative error of mass flow rate in spiral transport was within a reasonable range,this study lays a foundation both theoretically and statistically for the simulation of contact parameters for Broussonetia papyrifera stalk harvesting processing,mechanical harvesting,and so on.展开更多
文摘Two new megastigmane O-glucopyranosides, named （2R,3R,5R,6S,9R）-3-hydroxy-5,6-epoxy-β-ionol-2-O-β-D-glucopyrano- side （1） and （2R,3R,5R,6S,9R）-3-hydroxyl-5,6-epoxy-acety-β-ionol-2-O-β-D-glucopyranoside （2） together with six known mega- stigmanes, were isolated from the leaves of Broussonetia papyrifera （Linn.） Vent. Their structures were established by chemical methods and spectroscopic techniques including 2D NMR.
文摘Paper mulberry (Broussonetia papyrifera) is one of multifunctional species in agroforestry systems as well as one of traditional forages in many countries of Asia. Fully expanded tender leaves of B. papyrifera wildly growing under two traffic densities (a high traffic loads bearing more than 1000 vehicles per hour, HT;and a relatively clear section with almost no traffic loads, NT) were collected for carbohydrates, amino acids and phytohormones analysis. Leaves exposed to traffic pollutants were revealed to have significant lower amounts of carbohydrates and total amino acids than those growing at relatively clear environment. The levels of abscisic acid in the leaves significantly increased, while gib-berellin acid, indoleaetic acid, and zeatin riboside in the leaves significantly decreased, with the traffic densities. The results indicated that the contents of carbohydrates, amino acids and phytohormones in the leaves of B. papyrifera could be adversely affected by traffic pollution. Variations of the leaf biochemistries of B. papyrifera exposed to traffic pollutants implied that B. papyrifera could physiologically regulate itself to adapt or resist traffic stress.
基金supported by the Program of Yunling Scholarship,the CAS“Light of West China”Program(Western Youth Scholars“A”),the Youth Innovation Promotion Association CAS(2013252)the Applied Basic Research Programs of Yunnan Province(2017FB137).
文摘A new favane,bropapyriferol(1),and eleven known ones were isolated from the EtOAc part of Broussonetia papyrifera under the guidance of bioassay.The structure of compound 1 was determined by extensive 1D and 2D NMR,[α]_(D) spectroscopic data and quantum computation.Daphnegiravan F(2)and 5,7,3′,4′-tetrahydroxy-3-methoxy-8,5′-diprenylfavone(3)showed signifcantly anti-oral microbial activity against fve Gram-positive strains and three Gram-negative strains in vitro.Especially,compound 3 was more potent in suppressing Actinomyces naeslundii and Porphyromonas gingivalis(MIC=1.95 ppm)than the positive control,triclosan.
基金supported by the Institute for Environmental and Sanitation Studies,University Ghana,Legon,Accra,Ghana
文摘The purpose of this study was to evaluate the effects of Broussonetia papyrifera(paper mulberry)invasion and land use on the floristic composition of a dry semideciduous forest in Ghana.Forty-five plots(25 m×25 m each),distributed among three land uses-selectively logged(SL);abandoned farmlands(AF);and an undisturbed reference(RF)-were surveyed.Results showed lower tree species richness(S),diversity(H’),evenness(S)and basal area(BA)in the SL(46,0.78,0.32 and 269.12 m2 ha-1,respectively)and AF(40,0.53,0.45,and 131.16 m^2 ha^-1)sites compared to the RF site(79,2.66,0.87,963.72 m^2 ha^-1).Similar patterns were found at the shrub layer,but no differences were observed at the herb layer.Non-metric multidimensional scaling ordination revealed distinct species composition among the land uses.The two disturbed habitats,SL and AF,were associated with increased B.papyrifera invasion particularly in the overstory,with importance value index and mean relative density of 45 and 65.03%,and 42 and 53.29%,correspondingly.However,the species was only sparsely represented in the RF site.Tree density of B.papyrifera correlated negatively with H’,S,E,BA,and native tree density and richness.These findings highlight the strong link between human land use(i.e.,logging and slash-andburn farming),invasion,and vegetation characteristics,and suggest the need to limit these disturbances to conserve biodiversity within tropical forest ecosystems.
基金supported by Hunan Provincial Natural Science Foundation of China[Grant No.2019JJ50027]China Postdoctoral Science Foundation[Grant No.2020M683592]+1 种基金Key Projects of National Forestry and Grassland Bureau[Grant No.201801]Scientific Innovation Fund for Post-graduates of Central South University of Forestry and Technology[Grant No.CX20191004].
文摘Broussonetia kazinoki×Broussonetia papyrifera(ZJGS)is a hybrid species in Moraceae family,which has a very complicated hybrid origin.The excellent characteristics of fast growth,strong soil and water conservation ability,high leaf protein content and stem fiber content in ZJGS make it both ecological benefits in the mining area and economically valuable.This study aims to further understand ZJGS and other Moraceae taxa through the ZJGS chloroplast(cp)genome structure and the comparison with 12 closely related Moraceae species.Among the 13 Moraceae species,the cp genome length of seven Broussonetia species(ranges from 160,239 bp to 162,594 bp)is larger than that of six Morus species(ranges from 158,459 bp to 159,265 bp).Among the 77 shared protein-coding genes(PCGs)in Moraceae species,the obvious positive selection of Ka/Ks ratios acted on petD and rpl16 genes of B.kazinoki and B.papyrifera,respectively.Phylogenetic analysis based on shared PCGs from 28 species shows that ZJGS is closely related to maternal B.kazinoki.These findings provide data support for the origin of ZJGS hybridization and provide genomic resources for future ZJGS resource development and molecular breeding.
基金the Natural Science Foundation of Hunan Province,China(Grant No.2023JJ30310)Scientific Research Fund of Hunan Provincial Education Department(Grant No.22A0169).
文摘In this study,the discrete element software EDEM was applied to establish a simulation model of non-uniform-sized particle units for Broussonetia papyrifera stalks,which aimed to address the low utilization rate of existing Broussonetia papyrifera harvesting machinery,the significant variation between the simulated model of Broussonetia papyrifera stalks and their actual appearance,as well as the absence of contact parameter calibration.Through a combination of the free-fall collision method,inclined plane sliding method,and inclined plane rolling method,numerical simulation was conducted to analyze the pattern of variations in contact parameters between Broussonetia papyrifera stalks and the steel material of the machinery.Accordingly,these parameters were calibrated.The results showed that the coefficient of restitution between Broussonetia papyrifera stalks and steel materials was 0.321,the static friction factor was 0.589,and the rolling friction factor was 0.078.With the parameters of contact between Broussonetia papyrifera stalks as variables and the experimentally measured pile angle as the objective of optimization,the steepest ascent experiment and the three-factor five-level rotation combination experiment were conducted.In this way,a second-order response model was constructed to analyze the relationship between the contact parameters and the pile angle.Through the optimization analysis of experimental data,it was determined that the coefficient of restitution between Broussonetia papyrifera stalks was 0.21,the static friction factor was 0.24,and the rolling friction factor was 0.03.Furthermore,the calibration results were validated through experimentation to show that the relative error between the obtained pile angle under the context of optimal parameter combination and the actual one was 4.11%.In addition,the relative error of mass flow rate in spiral transport was within a reasonable range,this study lays a foundation both theoretically and statistically for the simulation of contact parameters for Broussonetia papyrifera stalk harvesting processing,mechanical harvesting,and so on.
基金supported by National Science & Technology Pillar Programin the Eleventh Five-year Plan (No.2006BAD09A04 and No.2006BAD03A0507)Science and Technology Plan Project in Jiangsu Province (BC2005372)Scientific Research Fund for Young Scholars in Jiangsu Academy of Forestry (JAF-2005-2)
