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国家自然科学基金(30671347)

作品数:8 被引量:15H指数:3
相关作者:陈晓婷孙翠霞王宗华鲁国东王爱荣更多>>
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发文基金:国家自然科学基金福建省自然科学基金公益性行业(农业)科研专项更多>>
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Preparation and characterization of atrazine-loaded biodegradable PLGA nanospheres
2019年
Atrazine is the second mostly used herbicide in USA,but low utilization ratio causes severe environmental problem,so controlled release system is highly needed in order to minimize the negative impact on environment.In this paper,a herbicide delivery system,atrazine-loaded poly(lactic-co-glycolic acid)(PLGA)nanoparticles(NPs)were prepared by forming an oilin-water emulsion using the emulsion-solvent evaporation method.By varying the preparation conditions of PLGA-NPs,such as sonication time,surfactant content,solvent fraction,and polymer content,the particle sizes of the PLGA-NPs were well controlled from 204 to 520 nm.The morphology and size distribution of PLGA-NPs were evaluated using dynamic light scattering(DLS)and scanning electron microscopy(SEM).Both the encapsulation efficiency and release profile of the herbicide from the PLGA-NPs were typically evaluated by using 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine(atrazine,ATZ)as the model.ATZ encapsulation efficiency within the PLGA-NPs was ranged from 31.6 to 50.5%.The release profiles of ATZ-loaded PLGA-NPs exhibited a much slower release rate in comparison with that of pure herbicide.The results demonstrated that the prepared PLGA-NPs had a high encapsulation efficiency and slow release rate,which could be used as a promising herbicide release system in agriculture to diminish the impact on the environment and minimize the potential harm to the farmers.
CHEN Xiao-tingTongxin Wang
关键词:ATRAZINEPLGANANOPARTICLEDRUG
Responses of Arabidopsis thaliana to oxalic acid stress based on proteomic analysis
<正>Oxalic acid(OA) is one of the essential pathogenic determinants of plant pathogenic fungi.To better reveal ...
Chen Xiao-ting~(1,2*),Sun Cui-xia~1,Yuan Li~1 1 College of Life Sciences,Fujian Agriculture and Forestry University,Fuzhou Fujian 350002,P.R.China 2 Key Laboratory of Bio-pesticide and Chemistry Biology,Ministry of Education,Fuzhou Fujian 350002, P.R.China
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拟南芥CYP76C2基因(At2g45570)的克隆及其菌核病抗性功能分析
2011年
以拟南芥基因组DNA为模板,扩增出细胞色素P450(CYP76C2)基因的ORF,成功构建了CYP76C2基因的过表达载体并获得转基因植株.通过离体和活体接种表明,CYP76C2基因的过表达植株对核盘菌的抗性增强.
陈晓婷孙翠霞王爱荣鲁国东
关键词:拟南芥细胞色素P450菌核病草酸
枯草芽孢杆菌草酸脱羧酶转化拟南芥研究初报被引量:3
2008年
多种真菌在致病过程中会分泌草酸,这些草酸产生菌寄主范围广,可以导致上百种植物病害,造成世界范围农作物的严重减产。草酸可以通过氧化与脱羧两种途径降解。该研究克隆了枯草芽孢杆菌的草酸脱羧酶基因Yvrk,并构建其植物表达载体,通过农杆菌浸花转化拟南芥,收获种子,用除草剂Basta筛选获得15株转基因植株,对其中的11个株系分别离体接种菌核病菌,24h后量病斑,发现有6株转基因植株的病斑显著小于野生型。PCR验证发现大部分转基因植株确有Yvrk的存在,实验结果说明草酸脱羧酶基因确能一定程度上缓解真菌病害。
陈晓婷陈芳芳郑麟林志伟王爱荣鲁国东王宗华
关键词:拟南芥枯草芽孢杆菌草酸脱羧酶菌核病菌
AtWRKY63基因过表达拟南芥对核盘菌抗性的研究被引量:1
2014年
为研究草酸在核盘菌致病过程中可能的作用,以模式植物拟南芥为材料,采用30mmol/L草酸喷施3周龄拟南芥,发现草酸显著诱导拟南芥AtWRKY63的表达。通过构建AtWRKY63过表达载体转化拟南芥,获得过表达AtWRKY63的纯系转基因植株,再用核盘菌活体接种拟南芥,结果表明过表达AtWRKY63植株对核盘菌的抗性显著增强。组织化学染色结果表明,AtWRKY63是通过诱导植物的氧爆发,抑制核盘菌菌丝的生长来抵御核盘菌的侵染;qRT-PCR对拟南芥转录水平分析表明,AtWRKY63可能激活了过表达植株的水杨酸与茉莉酸依赖的抗病信号途径,从而增强对核盘菌的抗性。
陈晓婷刘军林桂芳孙翠霞
关键词:拟南芥核盘菌草酸
The Physiological and Molecular Responses of Arabidopsis thaliana to the Stress of Oxalic Acid被引量:2
2009年
Many fungal phytopathogens can secrete oxalic acid (OA), which is the crucial pathogenic determinant and plays important roles in pathogenicity and virulence of pathogen during infection process. However, how plants respond to OA stress still needs further characterization. In this study, we observed the physiological and molecular responses of Arabidopsis thaliana to OA stress. The leaves of 6-wk-old A. thaliana were sprayed with OA and distilled water respectively, and 0, 2, 4, 8, 12, and 24 h later, the leaves were collected and the contents of MDA, H2O2, and GSH, and the activities of CAT, SOD, and POD were determined and the expressions of PR1 and PDF1.2 were also studied. Under the stress of 30 mmol L-1 OA, SOD activity was first enhanced to reduce the accumulation of O2.-. But immediately, POD, CAT, and GSH all decreased extremely resulting in the accumulation of H2O2, and the MDA content increased 24 h later. GSH activity was enhanced significantly at 24 h after OA used. However, H2O2 wasn't eliminated at the same time, suggesting that the activity inhibitions of POD and CAT might be the reasons that caused Arabidopsis cells' impairment under OA stress. RT-PCR results indicated that PDF1.2, a marker gene of the JA/ET signaling was significantly induced; PR1, an indicator gene in SA signaling, was slighlty induced from 8 to 12 h after OA stress. In conclusion, Arabidopsis may recruit metabolism of reactive oxygen, both JA/ET and SA signaling pathways to respond to OA stress. These results will facilitate our further understanding the mechanisms of plant response to OA and OA-dependent fungal infection.
CHEN Xiao-tingLIN JieSHAO Xue-fengOU Xiao-mingWANG Zong-huaLU Guo-dong
拟南芥对茉莉酸甲酯不敏感突变体的筛选与初步分析
2008年
茉莉酸是一种植物激素,它在植物的生长发育和生物和非生物胁迫的抗性方面起着重要的作用。通过茉莉酸甲酯对拟南芥Col-4生长影响的研究,确定了筛选压为200μmol/L。并从拟南芥激活标签突变体库中筛选到1株茉莉酸不敏感的突变体,其TAIL-PCR的第三步产物回收、测序、比对的结果表明:T-DNA插入位点位于At5g39430(Hypothetical protein)和At5g39440(Snf1-related protein kinase,putative)之间。
陈晓婷陈芳芳孙翠霞郑麟王爱荣王宗华
关键词:拟南芥突变体筛选茉莉酸甲酯
草酸胁迫对拟南芥抗氧化酶和苯丙氨酸解氨酶的影响被引量:4
2009年
以6周龄拟南芥生态型Columbia-4为材料,在0(CK)、5、10、15、20、25、30、35 mmol.L-1草酸(OA)胁迫48 h后,测定过氧化氢酶(CAT)、超氧化物岐化酶(SOD)、过氧化物酶(POD)和苯丙氨酸解氨酶(PAL)的活性及丙二醛(MDA)的含量,以探讨OA胁迫对模式植物拟南芥活性氧代谢及PAL活性的影响.结果表明:相比于CK,PAL活性极显著地升高;SOD活性也受到诱导,在20 mmol.L-1OA胁迫下,SOD活性最高;CAT和POD的活性与CK相比,受到抑制,在20 mmol.L-1OA胁迫下,二者被抑制的程度最高,并且POD活性较CAT活性被抑制的程度更大;MDA含量与OA浓度呈良好的线性关系(y=0.0279x+1.6567,R2=0.9222***),表明OA浓度越高,对拟南芥细胞的伤害越大.可见,OA有可能通过抑制CAT和POD的活性,导致H2O2等活性氧自由基的累积和膜脂过氧化作用,最终引起对拟南芥叶片的毒害.
陈晓婷林捷邵雪风欧晓敏孙翠霞鲁国东王宗华
关键词:拟南芥草酸抗氧化酶苯丙氨酸解氨酶
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