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Molecular Basis of Unique Branching Phenotypes in Salvia splendens and the Role of PSY

Phyton-International Journal of Experimental Botany 2022年第6期91卷 1211-1226页

作者： Peipei Hong Mei Wang Liting Zhi Hongwei Chen Kefeng Liu Hongli Wang College of Humanities and Urban-Rural Development Beijing University of AgricultureBeijing102206China College of Landscape Architecture Beijing University of AgricultureBeijing102206China Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees Beijing102206China beijing Engineering Research center of Rural Landscape Planning and Design Beijing102206China

The branching system of higher plants plays a very important role in plant morphogenesis,and the number of branches can directly affect crop yield and the ornamental value of plants.It is a complicated development process involving complex molecular mechanisms.The‘Cailinghong’variety of Salvia splendens is characterized by its great branching ability with the ability to grow into a spherical form naturally,without pinching.To gain insight into the molecular events during the branching development of S.splendens,suppressive subtractive hybridization(SSH)technology was used to screen differentially expressed genes between the erect plant type(strain 35)and the spherical plant type(‘Cailinghong’).In total,96 and 116 unigenes were annotated.Four and eight unigenes up-regulated in‘Cailinghong’and strain 35,respectively,were associated with plant hormone anabolism and signal transduction,suggesting that they participate in the branching process.One of these genes,phytoene synthase(PSY),is a precursor of the new plant hormone group strigolactones.Using the PSY fragment(192 bp)as a template,the cDNA sequence of PSY in S.splendens was cloned and named SsPSY.A relative expression analysis and transgenic test results indicated that SsPSY plays an important role in lateral branch development in‘Cailinghong’.These results provide new insight into the molecular mechanisms underlying branching in S.splendens.

关键词： Lateral branch development differential gene expression Salvia splendens suppression subtractive hybridization library SsPSY

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Characteristics of dihydroflavonol 4-reductase gene promoters from different leaf colored Malus crabapple cultivars

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Horticulture Research 2017年第1期4卷 32-41页

作者： Ji Tian Meng-chen Chen Jie Zhang Ke-ting Li Ting-ting Song Xi Zhang Yun-cong Yao Department of Plant Science and Technology Beijing University of AgricultureBeijing102206China Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees Beijing102206China

Anthocyanins are secondary metabolites in land plants that contribute to the colors of leaves and flowers,and are nutritionally valuable components of the human diet.The DFR gene plays an important role in the anthocyanin biosynthetic pathway.In this study,we investigated the regulation of DFR expression and in different Malus crabapple cultivars that show distinct patterns of leaf coloration,and how it influences leaf anthocyanin accumulation and coloration.Specifically,we studied the ever-red leaved cultivar‘Royalty’,the ever-green leaved cultivar‘Flame’and the spring-red leaved cultivar‘Radiant’.RT-PCR analysis showed that the expression of McDFR1 correlated with the expression of a MYB transcription factor,McMYB10,and with anthocyanin accumulation.We isolated five McDFR1 promoter fragments from the three cultivars and identified four different fragments(F1–4)that were present either in several cultivars,or only in one.Yeast one-hybrid and electrophoretic mobility shift assay analyses showed that McMYB10 could bind to all the McDFR1 promoters,except McDFR1-Ra2.The F1,F2 and F3 fragments did not affect McMYB10 binding to the McDFR1 promoters;however,we found evidence that the F4 fragment suppressed binding,and that the MYBGAHV amino-acid sequence maybe an important cis-element for McMYB10 protein binding.This information has potential value for strategies to modify plant color through genetic transformation.

关键词： cultivar colored flowers

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Cloning and Expression Analysis of Allene Oxide Synthase Gene Ls AOS in Lilium‘Siberia'

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Agricultural Biotechnology 2018年第2期7卷 5-9,31页

作者： qi wu pingsheng leng zenghui hu college of landscape architecture beijing university of agricultureBeijing 102206China Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees Beijing 102206China

[Objectives] Allene oxide synthase（ AOS）,the first specific enzyme in the biosynthetic pathway of jasmonate（ JA）,has an important role in regulating JA accumulation in plants. This study was conducted to amplify full-length AOS gene from Lilium‘Siberia＇（ LsAOS） and to explore the spatiotemporal expression of this gene. [Methods]LsAOS was cloned by rapid amplification of c DNA ends（ RACE） and analyzed bioinformatically. LsAOS expression level in nine organs/tissues and at four flowering stages was determined by quantitative PCR（ q-PCR）. [Results] LsAOS gene has an open reading frame of 1 542 bp,encoding a protein of 514 amino acids. The LsAOS protein sequence was more homologous with the AOS protein of Musa acuminata Colla than that in any other plant species.The LsAOS expression reached the maximum level at bud stage,and then gradually decreased over time during the flowering period. The LsAOS expression level in leaves was the highest,followed by in inner petals,roots,stems,etc. [Conclusions]JA participates in the whole process of plant development,and is closely related to stress resistance and secondary metabolism. AOS is one of the key genes in JA pathway and plays an important role in regulating the biosynthesis of JA.

关键词： Lilium＇Siberia＇ LsAOS Gene cloning Expression analysisHome

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Influence of physiological and environmental factors on the diurnal variation in emissions of biogenic volatile compounds from Pinus tabuliformis

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Journal of environmental Sciences 2019年第7期31卷 102-118页

作者： Jungang Chen Huaxing Bi Xinxiao Yu Yanlin Fu Wenchao Liao College of Soil and Water Conservation Beijing Forestry University Institute of ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University Ji County Station Chinese National Ecosystem Research Network (CNERN) Key Laboratory of State forestry Administration on Soil and Water Conservation Beijing Forestry University beijing Engineering Research center of Soil and Water Conservation Beijing Forestry University Engineering Research center of forestry ecological Engineering Ministry of Education Beijing Forestry University Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees beijing Water Consulting Co. LTD

Biological volatile organic compounds(BVOCs) have a large influence on atmospheric environmental quality, climate change and the carbon cycle. This study assesses the composition and diurnal variation in emission rates of BVOCs from Pinus tabuliformis, using an enclosure technique. environmental parameters(temperature and light intensity) and physiological parameters(net photosynthetic rate, P_n; stomatal conductance, g_s; intercellular CO_2 concentration, C_i; and transpiration rate, T_r) that may affect emission behavior were continuously monitored. The 10 most abundant compound groups emitted by P. tabuliformis were classified by gas chromatography–mass spectrometry. The dominant monoterpenoid compounds emitted were α-pinene, β-myrcene, α-farnesene and limonene. The diurnal emission rate of BVOCs changed with temperature and light intensity, with dynamic analysis of BVOCs emissions revealing that their emission rates were more affected by temperature than light. The variation in monoterpene emission rates was consistent with estimates of P_n, g_s and T_r. Basal emission rates(at 30 °C,) of the main BVOCs ranged from 0.006 to 0.273 μg^(-1)/(hr g),while the basal ER standardization coefficients ranged from 0.049 to 0.144 °C^(-1). Overall, these results provide a detailed reference for the effective selection and configuration of tree species to effectively prevent and control atmospheric pollution.

关键词： Biogenic volatile organic compounds Pinus tabuliformis Emission rate Monoterpenes

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Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China

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Journal of Mountain Science 2018年第3期15卷 519-531页

作者： MENG Chen NIU Jian-zhi YIN Zheng-cong LUO Zi-teng LIN Xing-na JIA Jing-wei College of Soil and Water Conservation Beijing Forestry University Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees Beijing University of Agriculture Department of Geography Texas A&M University College Station

Rock fragments have major effect on soil macropores and water movement. However, the characteristics of rock fragments and their relationship with macropore characteristics remain elusive in forest stony soils in northern mountainous area of China. The objectives of this study are to(1) use Industrial Computed Tomography(CT) scanning to quantitatively analyze rock fragment characteristics in intact soil columns in different forest lands and(2) identify the relationship between characteristics of rock fragments and that of the macropores. Intact soil columns that were 100 mm in diameter and 300 mm long were randomly taken from six local forest stony soils in Wuzuolou Forest Station in Miyun, beijing. Industrial CT was used to scan all soil column samples, and then the scanned images were utilized to obtain the three-dimensional(3 D) images of rock fragments and macropore structures. Next, theparameters of the rock fragments and macropore structure were measured, including the volume, diameter, surface area, and number of rock fragments, as well as the volume, diameter, surface area, length, angle, tortuosity and number of macropores. The results showed that no significant difference was found in soil rock fragments content in the 10-30 cm layer between mixed forest and pure forest, but in the 0-10 cm soil layer, the rock fragments in mixed forest were significantly less than in pure forest. The number density of macropores has significant negative correlation with the number of rock fragments in the 0-10 cm soil layer, whereas this correlation is not significant in 10-20 cm and 20-30 cm soil layers. The volume density of macropore was not correlated with the volume density of rock fragments, and there is no correlation between the density of macropore surface area and the density of rock fragment surface area. Industrial CT scanning combined with image processing technology canprovide a better way to explore 3 D distribution of rock fragments in soil. The content of rock fragments in soil is mainly determined by p

关键词：土壤岩石特征和森林中国体积密度山区碎裂扫描图象

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The MADS-box transcription factor CmAGL11 modulates somatic embryogenesis in Chinese chestnut(Castanea mollissima Blume)

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Journal of Integrative Agriculture 2020年第4期19卷 1033-1043页

作者： GAO Yue-rong SUN Jia-chen SUN Zhi-lin XING Yu ZHANG Qing FANG Ke-feng CAO Qing-qin QIN Ling beijing Advanced innovation center for Tree Breeding by Molecular Design Beijing University of AgricultureBeijing 102206P.R.China beijing Bei Nong Enterprise Management Co. Ltd.Beijing 102206P.R.China College of Plant Science and Technology Beijing Key Laboratory for Agricultural Application and New TechniqueBeijing University of AgricultureBeijing 102206P.R.China Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees Beijing University of AgricultureBeijing 102206P.R.China

Somatic embryogenesis(SE)is an effective approach of in vitro regeneration that depends on plant cell totipotency.However,largely unknown of molecular mechanisms of SE in woody plants such as Chinese chestnut(Castanea mollissima Blume),limits the development of the woody plant industry.Here,we report the MADS-box transcription factor Cm AGL11 in Chinese chestnut.Cm AGL11 transcripts specifically accumulated in the globular embryo.Overexpression of Cm AGL11 in chestnut callus enhanced its SE capacity,and the development of somatic embryos occurred significantly faster than in the control.RNA-seq results showed that Cm AGL11 affects the expression of several genes related to the gibberellin,auxin,and ethylene pathways.Moreover,the analysis of DNA methylation status indicated that the promoter methylation plays a role in regulation of Cm AGL11 expression during SE.Our results demonstrated that Cm AGL11 plays an important role in the SE process in Chinese chestnut,possibly by regulating gibberellin,auxin,and ethylene pathways.It will help establish an efficient platform to accelerate genetic improvement and germplasm innovation in Chinese chestnut.

关键词： Chinese chestnut CmAGL11 somatic embryogenesis DNA methylation

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Decomposition dynamics and ecological stoichiometry of Quercus acutissima and Pinus densiflora litter in the Grain to Green Program Area of northern China

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Journal of forestry Research 2020年第5期31卷 1613-1623页

作者： Jianni Sun Peng Gao Haidong Xu Cheng Li Xiang Niu forestry College Mountain Tai Forest Ecosystem Research Station of State Forestry AdministrationShandong Provincial Key Laboratory of Soil Erosion and Ecological RestorationShandong Agricultural UniversityTai’an 271018ShandongPeople’s Republic of China Research Institute of Forest ecology Environment and ProtectionChinese Academy of ForestryBeijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit TreesBeijing 100091People’s Republic of China

Litter decomposition and ecological stoichiometry of nutrient release is an important part of material cycling and energy flow in forest ecosystems.In a study of the ecological stoichiometry and nutrient release during litter decomposition in a pine–oak forest ecosystem of the Grain to Green Program(GTGP)area of northern China,a typical pine and oak species(PDS:Pinus densiflora Sieb.,QAC:Quercus acutissima Carr.)were selected in the Taiyi Mountain study area.The ecological stoichiometry characteristics of carbon(C),nitrogen(N)and phosphorus(P)and litter decomposition dynamics were studied by field sampling and quantitative analyses.The results showed the following.(1)The decomposition dynamics of both litters was slow-fast-slow.The most important climatic factor affecting the litter decomposition rate from May to October was precipitation and temperature from November to April of the following year.(2)Throughout the 300-day study,in both litters,C of the two litters was released,N first accumulated and was then released,and P exhibited a release-accumulate-release pattern.(3)C:P was significantly higher than C:N and N:P(pecomposition in the two typical pine–oak forest ecosystems was relatively weak;therefore,more attention should be paid to nitrogen-fixing species and mixed forests in the GTGP area of northern China.

关键词： Decomposition dynamics ecological stoichiometry Litter Pinus densiflora Quercus acutissima Grain to Green Program(GTGP)

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The historical and current research progress on jujube–a superfruit for the future

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Horticulture Research 2020年第1期7卷 1259-1275页

作者： Mengjun Liu Jiurui Wang Lili Wang Ping Liu Jin Zhao Zhihui Zhao Shengrui Yao Florin Stănică Zhiguo Liu Lixin Wang Changwei Ao Li Dai Xiansong Li Xuan Zhao Chunxiang Jia Research center of Chinese Jujube Hebei Agricultural UniversityBaoding 071001 HebeiChina College of Horticulture Hebei Agricultural UniversityBaoding 071001 HebeiChina College of forestry Hebei Agricultural UniversityBaoding 071001 HebeiChina College of Life Science Hebei Agricultural UniversityBaoding 071001 HebeiChina Department of Plant and environmental Sciences Sustainable Agriculture Science Center at AlcaldeNew Mexico State University371 County Road 40AlcaldeNM 87511USA Faculty of Horticulture University of Agronomic Sciences and Veterinary Medicine of Bucharest011464 BucharestRomania College of Food Science and Technology Hebei Agricultural UniversityBaoding 071001 HebeiChina National Engineering Research center for Agriculture in Northern Mountainous Areas Hebei Agricultural UniversityBaoding 071001 HebeiChina Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees Beijing 100000China Propaganda Department Hebei Agricultural UniversityBaoding 071001 HebeiChina

Jujube(Ziziphus jujuba Mill.),or Chinese date,is the most important species of Rhamnaceae,a large cosmopolitan family,and is one of the oldest cultivated fruit trees in the world.It originates from the middle and lower reaches of the Yellow River,the‘mother river’of the Chinese people.It is distributed in at least 48 countries on all continents except Antarctica and is becoming increasingly important,especially in arid and semiarid marginal lands.Based on a systematic analysis of the unique characteristics of jujube,we suggest that it deserves to be recognized as a superfruit.We summarized historical research achievements from the past 3000 years and reviewed recent research advances since 1949 in seven fields,including genome sequencing and application,germplasm resources and systematic taxonomy,breeding and genetics,cultivation theory and techniques,pest control,postharvest physiology and techniques,and nutrition and processing.Based on the challenges facing the jujube industry,we discuss eight research aspects to be focused on in the future.

关键词： Ziziphus jujuba Mill fruit trees Scientific research History Advances Prospects

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Deposition of water-soluble inorganic ions in PM_(2.5) in a typical forestry system in beijing,China

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Forest ecosystems 2018年第4期5卷 486-497页

作者： Junqi Ding Xiaoxiu Lun Weifang Ma Lu Zhao Yingying Cao Fengbin Sun Renna Li College of environmental Science and Engineering Beijing Forestry University State Key Laboratory of environmental Criteria and Risk Assessment Chinese Academy of Environmental Sciences School of Soil and Water Conservation Beijing Forestry University

Background: Rapid economic development in China has resulted in an increase in severe air pollution in city groups such as the beijing-Tianjin-Hebei Metropolitan Region. PM2.5(fine particles with an aerodynamic equivalent diameter of 2.5 μm or less) is one of the most important pollutants. The deposition process is an important way of removing particles from the air. To evaluate the effect of an urban forest on atmospheric particle removal, a concentration gradient method was used to measure the deposition velocities of water-soluble inorganics in PM2.5 in two national forest parks in beijing, China. The following eight water-soluble inorganic ions in PM2.5 were investigated: sodium, ammonium, potassium, magnesium, calcium, chloride, nitrate, and sulfate.Methods: Samples were taken from two sites in beijing from the 7 th to the 15 th May, 2013. The concentrations of water-soluble inorganic ions were analyzed with ion chromatography. We used the concentration gradient technique to estimate the deposition flux and velocity. To determine the relationships between leaf traits and particle accumulation, typical leaf samples from each selected species were studied using scanning electron microscopy.Results: The total deposition flux and total deposition velocity during the daytime were higher than those at night.Sulfate showed the biggest deposition flux and velocity at both study sites, whereas the other ions showed different trends at each site. Result from higher proportion of coniferous to broadleaved trees, the total deposition flux of the eight ions measured in Jiufeng National Forest Park was greater than that in Olympic Forest Park.Conclusions: The deposition velocity was affected by meteorological conditions such as wind speed, temperature,and humidity. The deposition velocity was also influenced by tree species. The surface of plants is an important factor influencing particle deposition. The results of this study may help in assessing the effects of forestry systems on particle removal and provide evidence f

关键词： Fine particle Water-soluble inorganics Forest Dry deposition Deposition velocity

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Biogenic volatile organic compound emissions from leaves and fruits of apple and peach trees during fruit development

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Journal of environmental Sciences 2021年第10期33卷 152-163页

作者： Shuangjiang Li Xiangyang Yuan Yan Xu Zhengzhen Li Zhaozhong Feng Xu Yue Elena Paoletti collaborative innovation center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)School of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory of Agrometeorology of Jiangsu Province School of Applied MeteorologyNanjing University of Information Science&TechnologyNanjing 210044China State Key Laboratory of Urban and Regional ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Institute of Research on Terrestrial ecosystems National Council of ResearchVia Madonna del Piano 1050019 Sesto FiorentinoFlorenceItaly

Biogenic volatile organic compounds(BVOCs)are widely involved in a variety of atmospheric chemical processes due to their high reactivity and species diversity.To date,however,research on BVOCs in agroecosystems,particularly fruit trees,remains scarce despite their large cultivation area and economic interest.BVOC emissions from different organs(leaf or fruit)of apple and peach trees were investigated throughout the stages of fruit development(FS,fruit swelling;FC,fruit coloration;FM,fruit maturity;and FP,fruit postharvest)using a proton-transfer-reaction mass spectrometer.Results indicated that methanol was the most abundant compound emitted by the leaf(apple tree leaf 492.5±47.9 ng/(g·hr),peach tree leaf 938.8±154.5 ng/(g·hr)),followed by acetic acid and green leaf volatiles.Beside the above three compounds,acetaldehyde had an important contribution to the emissions from the fruit.Overall,the total BVOCs(sum of eight compounds studied in this paper)emitted by both leaf and fruit gradually decreased along the fruit development,although the effect was significant only for the leaf.The leaf(2020.8±258.8 ng/(g·hr))was a stronger BVOC emitter than the fruit(146.0±45.7 ng/(g·hr))(P=0.006),and there were no significant differences in total BVOC emission rates between apple and peach trees.These findings contribute to our understanding on BVOC emissions from different plant organs and provide important insights into the variation of BVOC emissions across different fruit developmental stages.

关键词： Biogenic volatile organic compounds(BVOCs) Oxygenated VOCs(OVOCs) fruit trees

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