Canine renal failure syndrome in three dogs     

Won-Il Jeong  Sun Hee Do  Da-Hee Jeong  Jae-Yong Chung  Hai-Jie Yang  Dong-Wei Yuan  Il-Hwa Hong  Jin-Kyu Park  Moon-Jung Goo  Kyu-Shik Jeong 《Journal of veterinary science (Suw?n-si, Korea)》2006,7(3):299-301

Three dead dogs were brought to the College of Veterinary Medicine, Kyungpook National University for study. Clinically, all the dogs showed emaciation, anorexia, depression, hemorrhagic vomiting and diarrhea for 7~10 days before death. All the clinical signs were first noted for about one month after feeding the dogs with commercial diets. At necropsy, all 3 dogs had severe renal damage with the same green-yellowish colored nephroliths in the renal pelvis. They also showed systemic hemorrhage and calcification of several organs, which might have been induced by uremia. Microscopically, necrosis, calcification and calculi were detected in the renal tubules, and especially in the proximal convoluted tubules and collecting ducts of the kidney. These findings were supportive of a mycotoxic effect, and especially on their kidneys. However, the precise cause of the toxic effect in these cases of canine renal failure could not be determined.  相似文献   

应用尖孢镰刀菌毒素滤液鉴定大豆品种抗病性初探   总被引：1，自引：0，他引：1  

台莲梅  许艳丽  闫凤云 《植物保护》2006,32(3):49-52

引起大豆根腐病的尖孢镰刀菌粗毒素不仅能使大豆根部产生类似病菌侵染引起的症状,而且能抑制大豆幼根的生长和对大豆幼苗具有致萎作用;用毒素滤液处理大豆胚根和幼根,测定大豆不同品种抗病性,用盆栽土壤作对照,试验结果基本一致。利用毒素滤液测定不同品种对大豆根腐病的抗病性,可应用于大量的初筛工作。  相似文献   

F-2毒素致体外培养大鼠睾丸支持细胞DNA损伤     

邬静  袁莉芸  袁慧 《中国兽医学报》2007,27(5):731-732,736

为探讨F-2毒素对雄性生殖机能的影响,取大鼠睾丸支持细胞进行体外培养,运用单细胞凝胶电泳技术检测51、0、20和40 mg/L的F-2毒素攻毒后24 h支持细胞DNA的损伤情况。结果显示,F-2毒素在一定浓度范围内对体外培养的支持细胞DNA产生损伤作用,且受损程度随着F-2毒素攻毒剂量而升高,具有明显量效关系。除5 mg/L剂量组外,其余各组的细胞受损率、彗星尾长和DNA损伤程度与阴性对照组相比差异极显著（P〈0.01）,表明F-2毒素对体外培养的大鼠睾丸支持细胞有毒性作用,能够损伤细胞DNA。  相似文献   

Genomic analysis of antifungal metabolite production by <Emphasis Type="Italic">Pseudomonas fluorescens</Emphasis> Pf-5     

Joyce E. Loper  Harald Gross 《European journal of plant pathology / European Foundation for Plant Pathology》2007,119(3):265-278

The complete genomic sequences of several Pseudomonas spp. that inhabit the rhizosphere are now available, providing a new opportunity to advance knowledge of plant growth-promoting rhizobacteria (PGPR) through genomics. Among these is the biological control bacterium Pseudomonas fluorescens Pf-5. Nearly 6% of the 7.07 Mb genome of Pf-5 is devoted to the biosynthesis of secondary metabolites, including antibiotics toxic to soilborne fungi and Oomycetes that infect plant roots, and two siderophores involved in iron acquisition. Three orphan gene clusters, for which the encoded natural product was unknown, also were identified in the genome of Pf-5. The product synthesized from one of the orphan gene clusters was identified recently using a new ‘genomisotopic approach’, which employs a combination of genomic sequence analysis and isotope guided fractionation. Application of the genomisotopic approach to one orphan gene cluster in Pf-5 resulted in the discovery of orfamide A, founder of a new group of bioactive cyclic lipopeptides with a putative role in biological control of plant disease.  相似文献   

低浓度玉米小斑病菌C小种毒素培养滤液对玉米叶片过氧化物酶活性的诱导作用   总被引：1，自引：0，他引：1  

商闯  马春红  李运朝  翟彩霞  董文琦  崔四平  侯立白  贾银锁 《中国生物防治》2007,(Z1)

分别用不同低浓度玉米小斑病菌C小种毒素培养滤液处理两种基因型(C103和B37)的同核异质系的玉米叶片,以提高玉米叶片内过氧化物酶(POD)的活性;结果说明:过氧化物酶的活性变化与植物抗病性呈正相关,低浓度C毒素培养滤液本身能够作为激发子来诱导玉米获得抗性,故低浓度C毒素培养滤液作为激发子来诱导玉米的系统获得性抗性具有一定的广适性。对CB37和CC103的处理中,1∶60处理组效果均表现为较好,POD酶活性最高。  相似文献   

水杉色二孢毒素生物活性研究   总被引：1，自引：0，他引：1  

吴大椿  陈小丽 《湖北农学院学报》2000,20(3):203-205

水杉枯萎病病原菌色二孢（Ｄｉｐｌｏｄｉａ ｓｐ）真菌可以产生有毒代谢物。生物测定结果表明：该毒素具有广谱性，对裸子植物水杉和池杉、被子植物中杨柳科的垂柳、安石榴科的石榴等树木枝条具致萎作用，对小麦、玉米、油菜等种子的发芽及生长具有一定的抑制作用。粗毒素透析及稳定性测试表明：该毒素成分复杂，包括可以透过和不能透过半透膜的组分，具有很强的热稳定性，但在室温下放置长时间后活性会降低。  相似文献   

转Bt基因棉新棉33B叶片氮素代谢特征及其化学调控潜力   总被引：3，自引：1，他引：2  

董志强  何钟佩  翟学军 《棉花学报》2000,12(3)

新棉33B 在开花期间 ,叶片硝酸还原酶活性呈现递减趋势 ,蛋白酶活性和叶蛋白含量呈增加趋势 ,全氮、氨基酸含量与硝酸还原酶活性呈正相关。蕾期至盛花期毒蛋白含量呈马鞍形变化。缩节安系统化控处理使功能叶片硝酸还原酶、蛋白酶的活性、叶片蛋白含量、氨基酸和全氮的含量以及叶片毒蛋白的含量均有提高 ,最终提高单株结铃数和单铃重  相似文献   

苯甲酸在松材线虫病中的作用   总被引：1，自引：0，他引：1  

欧阳革成  张润杰 《林业科学》2007,43(2):73-76

在室内条件下,初步研究苯甲酸对松树和松材线虫病的作用.用不同浓度的苯甲酸溶液分别处理松枝,显示低浓度苯甲酸溶液能显著延长松枝的存活期,高浓度苯甲酸溶液处理的松枝针叶出现褐变现象,但对松枝的存活期没有影响,其症状与松材线虫病不同.分别用1.0 mmol·L-1的苯甲酸溶液和自来水培养接种松材线虫的松枝,在用苯甲酸溶液处理的接种松枝中,虽然松材线虫仍能大量增殖,但与用自来水培养的接种松枝相比,其蒸腾强度显著增强,失水萎蔫程度显著降低,存活期显著延长,这说明苯甲酸在松材线虫病树中可能起着抑制与病害相关的致病菌或提高松树抗病能力的作用.  相似文献   

病原菌毒素对植物的致病作用   总被引：4，自引：0，他引：4  

王军 《中国森林病虫》2001,20(6):9-11

病原菌在侵染植物的过程中产生的毒素一向被认为是致病的重要因子，然而对毒素致病作用的确定却是一个复杂的问题，毒素在一般生物测定中表现出来的对植物组织的伤害与破坏作用并不一定代表其具备致病力的密切相关，但是对于具体毒素在相应病种中的作用程度及对致病力的贡献大小还需要一些更严格的试验予以确定。  相似文献   

Correlation between Chemical Structure and Biological Activity of Host-Selective Plant Pathogen Mycotoxins     

WEI Shuhua LIANG Jun YE Jianren ZHANG Xingyao** . School of Resources  Environment of Nanjing Forestry University  Nanjing  P.R. China . Institute of Forest Ecology  Environmental  Protection  Chinese Academy of Forestry  Beijing  P.R. China 《中国林业科技(英文版)》2007,6(1):62-68

Toxin, one of the most important factors of plant fungal disease, has attracted much attention of many academicians who have been studying pathogen mycotoxin in deep research. The paper summarized chemical structures of some host-selective plant pathogen mycotoxins discovered in recent years and the correlation between biological activity and chemical structure of toxin.  相似文献