With the Fokienia hodginsii forest in Qishan National Forest Park as the object of study, this study observed the diurnal variation of concentrations of atmospheric aerosol particles inside and outside the forest, col...With the Fokienia hodginsii forest in Qishan National Forest Park as the object of study, this study observed the diurnal variation of concentrations of atmospheric aerosol particles inside and outside the forest, collected the data of microclimate factors, and analyzed their correlation with the particle concentration. The results showed that the diurnal variation curves of the particle concentration of the forest and the forest edge had two peaks and two troughs". There were two peaks throughout the day at 13:00 and 19:00 or 17:00 as well as two troughs at 7:00-9:00 and 15:00 or 17:00. The atmospheric aerosol particle in the forest was mainly fine particles, while the forest edge was dominated by coarse particles. For the forest and the forest edge, the diurnal variation trends of various atmospheric aerosol particles were similar. The particle concentration was positively correlated with temperature, relative humidity, and il umination intensity and negatively correlated with wind speed, and the particle concentration outside the forest was significantly negatively correlated with the wind speed.展开更多
As the reproductive organ of the endangered species Fokienia hodginsii,the size of the cones is a constraint on the reproductive renewal of the population.In this study,the molecular basis of the influence of cone siz...As the reproductive organ of the endangered species Fokienia hodginsii,the size of the cones is a constraint on the reproductive renewal of the population.In this study,the molecular basis of the influence of cone size on F.hodginsii was elucidated by comparing the phenotype,biochemistry,and transcriptome of two cultivars of F.hodginsii(‘FJ431’and‘FJ415’).The two cultivars differed significantly in cone size,with FJ431 having a significantly larger cone size and weight than FJ415,1.32 and 1.90 times that of FJ415,respectively.RNA-Seq analysis of both cultivars retrieved 75,940 genes whose approximate functions were classified as the pathway of response to endogenous stimulus and response to hormone and showed significant differences in the auxin-activated signaling pathway,particularly the MAPK signaling pathway-plant.Furthermore,the endogenous IAA content was significantly higher in FJ431 than in FJ415,and 1.58 and 1.29 times more IAA was present in immature and mature cones,respectively.Moreover,exogenous IAA treatment significantly induced the expression of the MAPK pathway-related gene TRINITY_DN10564_c0_g1 and significantly inhibited the expression of the MAPK pathwayrelated gene TRINITY_DN17056_c0_g1.Our work suggests that IAA can affect the cone size of F.hodginsii,most probably through the MAPK pathway.This has high theoretical and practical significance for the improvement of genetic breeding and the further cultivation of quality germplasm resources of F.hodginsii.展开更多
This study observed the temperature,relative humidity,and wind speed of the inner and outer Fokienia hodginsii forests and the urban area in autumn,used the comprehensive comfort index to represent human comfort,compa...This study observed the temperature,relative humidity,and wind speed of the inner and outer Fokienia hodginsii forests and the urban area in autumn,used the comprehensive comfort index to represent human comfort,compared the differences in the microclimates between the inner and outer forests and the urban area,and evaluated the impacts of the 3 plots on the comfort level of people’s outdoor activities.The results showed that:The inner forest had a drop in temperature ranging 0.7℃to 1.5℃compared with the outer forest;the outer forest had a drop in temperature ranging 0.6℃to 3.5℃compared with the urban area;the relative humidity of the inner forest was 0.04–5%higher than that of the outer forest,and 21.7–37.1%higher than that of the urban area;the wind speed of the inner forest was 56%lower than that of the urban area,and 35%lower than that of the outer forest.In short,the inner forest,where people felt most comfortable,was a better place for developing outdoor activities in autumn.展开更多
This study analyzed the microclimate factors and human comfort index of the inner and outer Fokienia hodginsii forests and of a city square.The results showed that:①In terms of the average daily temperature,the inner...This study analyzed the microclimate factors and human comfort index of the inner and outer Fokienia hodginsii forests and of a city square.The results showed that:①In terms of the average daily temperature,the inner and outer forests and the city square ranked as follows:square>outer forest>inner forest.The temperature of the inner forest was 8.21–11.73℃lower than that of the city square,and the temperature of the outer forest was 7.41–10.34℃lower than that of the city square.The inner forest was cooled by 24.21%and 1.37%respectively than the outer forest and the city square.②In terms of the average daily relative humidity,the inner and outer forests and the city square ranked as follows:square<outer forest<inner forest.The average daily relative humidity of the inner forest,the outer forest,and the city square was 68.57,84.91,and 88.27,respectively.③In terms of the average daily wind speed,the inner and outer forests and the city square ranked as:square>outer forest>inner forest.Their daily variation ranges were 0–0.75,0.18–0.43,and 0.12–0.31 m/s,respectively.④In terms of the daily average illumination intensity,the inner and outer forests and the square ranked as:square>outer forest>inner forest.Their average daily illumination intensities were 371.68,4,582.01,and 17,641.63 lux,respectively.展开更多
为研究不同种源福建柏叶片形态的变异特征和生理特性,以期为福建柏良种选育提供科学依据。本试验对15个种源福建柏叶片性状及叶绿素荧光参数进行测定,分析福建柏叶片形态特征及生理特性在不同种源间的变化规律。结果表明:福建柏各叶功...为研究不同种源福建柏叶片形态的变异特征和生理特性,以期为福建柏良种选育提供科学依据。本试验对15个种源福建柏叶片性状及叶绿素荧光参数进行测定,分析福建柏叶片形态特征及生理特性在不同种源间的变化规律。结果表明:福建柏各叶功能性状均达到极显著水平(P<0.01),变异幅度为15.03%~27.05%之间,种源遗传力均达55%以上。叶长在种源间和种源内变异系数均最大,分别为27.05%、25.69%;叶面积以15号种源最大,为2.050 cm^(2);叶厚度种源遗传力最大,为0.962;PSⅡ潜在光化学活性(F_(v)/F_(o))、PSⅡ电子传递效率(F_(m)/F_(o))和光适应下PSⅡ实际光量子产额(YⅡ)在种源间存在显著差异(P<0.05)。福建柏叶长与经度、纬度呈正相关关系,而叶宽和纬度呈极显著正相关关系;叶厚度与经度呈极显著负相关,长宽比与纬度呈显著负相关,叶面积与年均温呈显著负相关。光适应下PSⅡ实际光量子产额(YⅡ)与表观电子传递效率(Electron transport rate)呈极显著正相关。福建柏叶片表型性状在种源间和种源内均存在丰富的遗传变异,且种源间的变异大于种源内的变异;不同种源福建柏叶片具有从西到东变长变薄的趋势、从南到北具有变狭长趋势,叶面积随日照时数的增加表现出变大的趋势。通过主成分分析进行综合评价,综合排名前5的种源依次为13、11、12、15和10号,处于福建柏分布范围的东南部,主要为福建省当地种源。研究结果为福建柏的引种选育及改良提供参考依据。展开更多
基金Sponsored by the Science and Technology Project of Beijing Municipal Administration Center of Parks(ZX2019)Beijing Science and Technology Plan Project(D171100001817001)
文摘With the Fokienia hodginsii forest in Qishan National Forest Park as the object of study, this study observed the diurnal variation of concentrations of atmospheric aerosol particles inside and outside the forest, collected the data of microclimate factors, and analyzed their correlation with the particle concentration. The results showed that the diurnal variation curves of the particle concentration of the forest and the forest edge had two peaks and two troughs". There were two peaks throughout the day at 13:00 and 19:00 or 17:00 as well as two troughs at 7:00-9:00 and 15:00 or 17:00. The atmospheric aerosol particle in the forest was mainly fine particles, while the forest edge was dominated by coarse particles. For the forest and the forest edge, the diurnal variation trends of various atmospheric aerosol particles were similar. The particle concentration was positively correlated with temperature, relative humidity, and il umination intensity and negatively correlated with wind speed, and the particle concentration outside the forest was significantly negatively correlated with the wind speed.
基金The“Eagle Program”of Fujian Province,funded by the Department of Human Resources and Social Security of Fujian ProvinceThe“Fujian Cypress 1st Generation Core Breeding Population Construction Research”(No.2021R1010004),funded by the Department of Science and Technology of Fujian Province.
文摘As the reproductive organ of the endangered species Fokienia hodginsii,the size of the cones is a constraint on the reproductive renewal of the population.In this study,the molecular basis of the influence of cone size on F.hodginsii was elucidated by comparing the phenotype,biochemistry,and transcriptome of two cultivars of F.hodginsii(‘FJ431’and‘FJ415’).The two cultivars differed significantly in cone size,with FJ431 having a significantly larger cone size and weight than FJ415,1.32 and 1.90 times that of FJ415,respectively.RNA-Seq analysis of both cultivars retrieved 75,940 genes whose approximate functions were classified as the pathway of response to endogenous stimulus and response to hormone and showed significant differences in the auxin-activated signaling pathway,particularly the MAPK signaling pathway-plant.Furthermore,the endogenous IAA content was significantly higher in FJ431 than in FJ415,and 1.58 and 1.29 times more IAA was present in immature and mature cones,respectively.Moreover,exogenous IAA treatment significantly induced the expression of the MAPK pathway-related gene TRINITY_DN10564_c0_g1 and significantly inhibited the expression of the MAPK pathwayrelated gene TRINITY_DN17056_c0_g1.Our work suggests that IAA can affect the cone size of F.hodginsii,most probably through the MAPK pathway.This has high theoretical and practical significance for the improvement of genetic breeding and the further cultivation of quality germplasm resources of F.hodginsii.
基金Sponsored by the Science and Technology Project of Beijing Municipal Administration Center of Parks(ZX2019,ZX2017)Beijing Science and Technology Plan Project(D171100001817001)
文摘This study observed the temperature,relative humidity,and wind speed of the inner and outer Fokienia hodginsii forests and the urban area in autumn,used the comprehensive comfort index to represent human comfort,compared the differences in the microclimates between the inner and outer forests and the urban area,and evaluated the impacts of the 3 plots on the comfort level of people’s outdoor activities.The results showed that:The inner forest had a drop in temperature ranging 0.7℃to 1.5℃compared with the outer forest;the outer forest had a drop in temperature ranging 0.6℃to 3.5℃compared with the urban area;the relative humidity of the inner forest was 0.04–5%higher than that of the outer forest,and 21.7–37.1%higher than that of the urban area;the wind speed of the inner forest was 56%lower than that of the urban area,and 35%lower than that of the outer forest.In short,the inner forest,where people felt most comfortable,was a better place for developing outdoor activities in autumn.
基金Sponsored by the Science and Technology Project of Beijing Municipal Administration Center of Parks(ZX2019)Beijing Science and Technology Plan Project(D171100001817001)
文摘This study analyzed the microclimate factors and human comfort index of the inner and outer Fokienia hodginsii forests and of a city square.The results showed that:①In terms of the average daily temperature,the inner and outer forests and the city square ranked as follows:square>outer forest>inner forest.The temperature of the inner forest was 8.21–11.73℃lower than that of the city square,and the temperature of the outer forest was 7.41–10.34℃lower than that of the city square.The inner forest was cooled by 24.21%and 1.37%respectively than the outer forest and the city square.②In terms of the average daily relative humidity,the inner and outer forests and the city square ranked as follows:square<outer forest<inner forest.The average daily relative humidity of the inner forest,the outer forest,and the city square was 68.57,84.91,and 88.27,respectively.③In terms of the average daily wind speed,the inner and outer forests and the city square ranked as:square>outer forest>inner forest.Their daily variation ranges were 0–0.75,0.18–0.43,and 0.12–0.31 m/s,respectively.④In terms of the daily average illumination intensity,the inner and outer forests and the square ranked as:square>outer forest>inner forest.Their average daily illumination intensities were 371.68,4,582.01,and 17,641.63 lux,respectively.
文摘为研究不同种源福建柏叶片形态的变异特征和生理特性,以期为福建柏良种选育提供科学依据。本试验对15个种源福建柏叶片性状及叶绿素荧光参数进行测定,分析福建柏叶片形态特征及生理特性在不同种源间的变化规律。结果表明:福建柏各叶功能性状均达到极显著水平(P<0.01),变异幅度为15.03%~27.05%之间,种源遗传力均达55%以上。叶长在种源间和种源内变异系数均最大,分别为27.05%、25.69%;叶面积以15号种源最大,为2.050 cm^(2);叶厚度种源遗传力最大,为0.962;PSⅡ潜在光化学活性(F_(v)/F_(o))、PSⅡ电子传递效率(F_(m)/F_(o))和光适应下PSⅡ实际光量子产额(YⅡ)在种源间存在显著差异(P<0.05)。福建柏叶长与经度、纬度呈正相关关系,而叶宽和纬度呈极显著正相关关系;叶厚度与经度呈极显著负相关,长宽比与纬度呈显著负相关,叶面积与年均温呈显著负相关。光适应下PSⅡ实际光量子产额(YⅡ)与表观电子传递效率(Electron transport rate)呈极显著正相关。福建柏叶片表型性状在种源间和种源内均存在丰富的遗传变异,且种源间的变异大于种源内的变异;不同种源福建柏叶片具有从西到东变长变薄的趋势、从南到北具有变狭长趋势,叶面积随日照时数的增加表现出变大的趋势。通过主成分分析进行综合评价,综合排名前5的种源依次为13、11、12、15和10号,处于福建柏分布范围的东南部,主要为福建省当地种源。研究结果为福建柏的引种选育及改良提供参考依据。
