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[目的]利用烟草BY-2悬浮细胞研究抗病毒新农药2%嘧肽霉素水剂诱导植物防卫反应的机制。[方法]用不同质量浓度的嘧肽霉素处理悬浮细胞,分光光度法测定胞外H2O2产生的动态过程及RT-q PCR方法测定防卫反应基因表达。[结果]烟草BY-2悬浮细胞经嘧肽霉素处理,产生活性氧迸发,并在处理1 h后达到高峰;嘧肽霉素能诱导细胞的FLS2、MAPKKK、PR1、NPR1和HSP70的上调表达,其中HSP70的上调效果最为显著。[结论]嘧肽霉素可通过诱导植物防卫反应相关基因的表达,达到诱导植物抗病毒病的作用。 相似文献
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《化工经济技术信息》2005,(5):3-3
据大连绿科生物化学有限公司透露,由该公司联合国内科研院所共同开发,拥有自主知识产权的微生物农药嘧肽霉素4月4日通过了国家科技成果鉴定。农业部组织的田间药效实验表明,嘧肽霉素比目前国内同类产品的药效高20%~30%,是我国近年来真正自主开发并实现产业化的抗病毒型生物农药,目前已获得了农业部的农药临时登记. 相似文献
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羟基嘧啶是合成地亚农(二嗪磷、二嗪农)的重要中间体。二嗪磷是一种广谱、高效、毒性较低的有机磷杀虫剂,1952年首先由H.Gysin合成,随后汽巴-嘉基、诺华等公司中生产。二嗪磷具有触杀、胃毒、熏蒸和一定的内吸作用,适用于防治棉、水稻、小麦、蔬菜和花卉等作物的多种害虫及螨类,亦也可拌种防治作物的地下害虫。随着对甲胺磷、氧化乐果等高毒农药品种的限制和禁止使用,低毒农药二嗪磷是一种重要的替代品种,因此,开发工艺简单、成本低、含量高的羟基嘧啶的生产工艺具有重要意义。 相似文献
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新型高效杀菌剂——苯醚菌酯 总被引:1,自引:0,他引:1
苯醚菌酯是国家“九五”期间由浙江化工科技集团有限公司创制合成研究所在新农药创制过程中发现的具有高效杀菌活性的甲氧基丙烯酸甲酯类化合物。该药剂对作物上的白粉病、霜霉病、炭疽病等病害有良好的生物活性,可作为瓜类、果树、蔬菜、小麦、烟草、花卉等作物的杀菌剂。现已申请了国家专利号:ZL 03120882.7及世界发明专利,其专利号为: WO20004084632,并完成了对防治作物白粉病和霜霉病临时登记大田试验。 相似文献
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进行了葡聚烯糖0.5%可溶粉剂防治番茄病毒病的田间试验。结果表明,该剂能够很好地控制番茄病毒病,防治效果明显高于对照,且对作物安全。 相似文献
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目的利用新城疫病毒(Newcastle disease virus,NDV)反向遗传系统构建表达呼吸道合胞病毒(respiratory syncytial virus,RSV)F蛋白的重组病毒,并以BALB/c小鼠为动物模型,评价其免疫原性。方法在已建立的NDV反向遗传系统的基础上,将RSV F基因插入NDV全长cDNA克隆中,构建并拯救获得表达RSV F蛋白的重组病毒rLS/RSV-F。采用间接免疫荧光(indirect immunoinfluscent assay,IFA)法鉴定RSV F蛋白的表达;以HA、病毒半数鸡胚感染量(50%infective dose,EID50)、半数组织感染量(50%tissue infectious dose,TCID50)及生长曲线等生物学指标对其生物学特性进行鉴定;将rLS/RSV-F滴鼻免疫BALB/c小鼠,于免疫后第49天经眼眶后静脉丛采血,分离血清,ELISA法检测IgG抗体效价,中和试验检测中和抗体效价。结果成功拯救表达RSV F蛋白的NDV重组病毒rLS/RSV-F,具有与亲本病毒相似的感染能力及生长动力学特性;rLS/RSV-F可刺激小鼠机体产生较高水平的针对RSV F蛋白的特异抗体及RSV中和抗体,与亲本病毒对照组相比,差异均有统计学意义(P <0. 05)。结论成功拯救了表达RSV F蛋白的NDV重组病毒,并通过动物实验证明重组病毒rLS/RSV-F具有较好的免疫原性,为RSV疫苗的研发提供了新思路。 相似文献
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试验结果表明,2%春雷霉素WP对白菜软腐病具有良好的防治效果。室内离体活性EC50值为27.13mg/L,在50、40、30mg/L处理剂量下,对白菜软腐病的平均防效为84.33%、79.31%、67.90%,对作物安全。 相似文献
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姚昕 《中国生物制品学杂志》2013,26(3):433-436
肠道病毒71型(Enterovirus 71,EV71)是手足口病(Hand,foot and mouth disease,HFMD)的主要病原体,属于肠道小RNA病毒,这类病毒的基因组由脆性平链RNA组成,易断裂,有较高的突变性。在混合感染中会发生同型不同株不同亚型,或同属不同型间的基因交换形成新的重组病毒,EV71也具有重组特性。新形成的重组病毒可能导致其生物学特性和致病性的改变,进而影响疾病的防控。本文就EV71病毒基因重组及可能引发的防控问题进行综述。 相似文献
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Long-term field experiments play an important role in understanding the complex interactions of plants, soils, climate and management and their effects on sustainable crop production. A long-term fertilizer experiment with maize-wheat-cowpea (fodder) is in progress since 1971 at Punjab Agricultural University farm Ludhiana, India. The experimental result for the first 21 years showed that application of N alone or in combination with P did not produce as much maize and wheat grains as the application of N, P and K together. Eight years after the start of the experiment, the optimal levels of N, P and K application (100% NPK) were unable to sustain the similar (maize) yield level as before because of Zn deficiency. Whereas in FYM amended plots the Zn deficiency did not appear and the higher crop yields could be sustained. The chemical control of weeds could not sustain the maize productivity at the same level as the manual removal of weeds. It was concluded that the high level of crop production can be sustained with the application of N, P and K under intensive cropping system provided deficiency of any of the micronutrient does not crop up. The deficiency of Zn is most likely to occur in semi-arid light textured alluvial soils under intensive cropping without the addition of farm yard manure/organic manures. In maize based cropping systems, manual control of weeds may be preferred to the chemical one. Addition of FYM in conjunction with 100% NPK is most beneficial both from bio-physical and economic point of view. 相似文献
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The investigation studied the optimal fertilizer rates and mixtures for maximum production of smooth cayenne pineapples in the tropical ferrallitic soil.Fertilized pineapples were significantly (P = 0.05) superior in growth and fruit yield to the unfertilized control. Nitrogen and potassium were the most critical nutrients. Nitrogen deficiency manifested within 6 months of planting as reduced, thorny and pink coloured leaves resulting in over 10 months delayed plant crop harvest and over 38% reduction in fruit yield. Less than 20% of pineapples which lacked nitrogen remained productive during the first ratoon crop. However, when nitrogen was increased twofold (100 to 200 kg/ha/year), the fruit of the plant crop doubled with 15-10% increased fruit lodging. Potassium significantly (P = 0.05) reduced fruit lodging and improved fruit yield and flavour.Nitrogen further enhanced the effective utilization of P and K for significant yield increases. Thus, the interaction between high nitrogen (200 kg/ha/year) and low phosphorus (50 kg/ha) or high potassium (200 kg/ha) respectively, significantly (P = 0.05) increased the yield of pineapples, while P and K interaction retarded growth, delayed crop maturity and reduced the fruit yield and quality. Pineapples which received fertilizer mixture of NPK 200-50-200 produced the highest and best quality fruits and was therefore recommended for optimum yield of pineapples in the tropical ferrallitic soils. 相似文献
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牛心朴子草抑制植物病毒活性成分安托芬的室内和田间活性测定 总被引:2,自引:0,他引:2
首次发现广泛分布于我国西北旱沙荒漠地带的牛心朴子草提取物中生物碱部位对危害极大的烟草花叶病毒具有很高的抑制活性,经生物活性跟踪与色谱分离,结构鉴定确认主要活性成分是安托芬。安托芬在1mg/L质量浓度下对烟草花叶病毒的抑制率高达60%。活体植株抗病毒活性的毒力测定结果表明,安托芬对活体植株烟草花叶病毒和活体植株马铃薯Y病毒具有很高的抑制活性,如安托芬在9mg/L的质量浓度下对活体植株烟草花叶病毒和活体植株马铃薯Y病毒的抑制率分别高达75%和80%。田间小区试验结果表明,牛心朴子草的效果明显好于两个对照药剂宁南霉素和病毒A,对烟草的生长发育无不良影响。 相似文献
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《中国生物制品学杂志》2010,(10)
目的制备风疹减毒活疫苗病毒滴定国家参考品,并进行标定。方法选择国内风疹减毒活疫苗生产毒株BRDⅡ制备风疹减毒活疫苗参考品,并对其进行鉴别试验、水分含量、病毒滴度及无菌检查等检定;检定合格后,组织4个实验室对候选参考品和国际参考品的病毒滴度协作标定,计算实验室内和实验室间变异系数;对候选国家参考品进行稳定性分析。结果制备的候选参考品鉴别试验、无菌检查结果均符合规定,水分含量为1.7%,病毒滴度为4.6lgCCID50/ml。经协作标定,风疹减毒活疫苗病毒滴定候选国家参考品的病毒滴度为(4.56±0.52)lgCCID50/ml,实验室内变异系数在1.25%~2.94%之间,实验室间变异系数为5.72%;国际参考品的病毒滴度为(3.96±0.08)lgCCID50/ml,实验室内变异系数在1.19%~3.21%之间,实验室间变异系数为2.04%。经考察,该参考品具有较好的稳定性。结论制备的参考品符合作为风疹减毒活疫苗病毒滴定国家参考品的要求。 相似文献