Evaluation of the hydroxyethyl starch stabilizing agent,Vetstarch, in the preservation of canine cerebrospinal fluid samples     

Lindsey N. Peterson  John A. Christian  R. Timothy Bentley  George E. Moore  Stephanie A. Thomovsky 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2020,49(1):95-99

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The cytologic and histologic diagnosis of ureteral fibroepithelial polyp in a dog     

Athema L. Etzioni  Rose E. Raskin  William G. Van Alstine  Jeff Yu 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2020,49(4):646-651

A 6-year-old, intact male, brindled, 30-Lb English Bulldog presented to the Purdue University Veterinary Teaching Hospital with a recurrent history of hematuria, periuria, and lethargy that responded temporarily to antibiotic therapy. The work-up included a complete blood count, serum biochemical profile, complete urinalysis, diagnostic imaging (abdominal radiographs and ultrasound with contrast urography), and exploratory laparotomy. The diagnostic imaging findings and subsequent exploratory revealed a unilateral, intraluminal, right-sided, 3-cm ureteral mass extending from the proximal ureter into the renal pelvis. Subsequently, a unilateral right-sided ureteronephrectomy followed by biopsy with cytopathology/cytology (impression smears) and histopathology of the ureteral mass was performed. The cytopathologic interpretation was benign mesenchymal proliferation with mildly atypical urothelial cells. The association of this mass with vascular tissue and a benign nuclear appearance on cytology is similar to reports of fibroepithelial polyps (FEPs) and myxomatous tumors. Histopathology diagnosed the mass as an FEP. Cytopathology proved useful in the presumptive diagnosis of this benign urothelial polyp. To the authors' knowledge, this is the first report using cytopathology to depict and characterize FEPs in veterinary and human medical literature.  相似文献   

一种水稻端三体的细胞学研究     

程祝宽  于恒秀  潘学彪  李欣  顾铭洪 《扬州大学学报(农业与生命科学版)》1997,(3)

在中籼３０３７初级三体１的后代中发现了一变异株，依据中籼３０３７减数分裂粗线期的核型分析结果，结合该变异株有丝分裂前中期染色体的特征以及减数分裂粗线期染色体的配对行为，确定该变异株为第１染色体短臂的端三体，定名为Ｔ１Ｓ。  相似文献   

白粉病菌初生芽管对小麦诱导抗性的细胞学研究     

胡东维  李振岐  康振生 《西北农林科技大学学报(自然科学版)》1997,25(2):6-11

利用多种细胞学方法对不同抗病性小麦白粉菌初生芽管的侵染行为及寄主细胞的诱导抗性进行了研究。结果表明，病菌初生芽管可诱导单个寄主细胞，产生比大麦和燕麦更为强烈的抗性，足以抵制后来附着胞的入侵，且这种诱导抗性还可向相邻细胞传递；在超微结构上，诱导抗性表现为寄主乳突反应能力增强，寄主细胞能够在附着胞入侵位点下，产生比高乳突抗性品种结构更为精致和坚硬的半圆形乳突，令附着胞入侵栓无法穿入。此外，本文还对诱导抗性的利用问题进行了讨论。  相似文献   

水稻类病变突变体lrd40的抗病性与细胞学分析   总被引：2，自引：0，他引：2  

王建军  朱旭东  王林友  张利华  薛庆中  何祖华 《中国水稻科学》2005,19(2):111-116

 由中花11经γ射线诱变获得的水稻类病变突变体lrd40，是一个对环境不敏感的全生育期表达的突变体。遗传分析表明，lrd40的类病变性状为1个隐性位点控制，与已报道的类病变突变体lrd38、lrd39、lrd42是非等位的。经多点接种试验，lrd40对水稻白叶枯病2个菌系PXO99A和DY89031都表现抗病。lrd40与野生型杂交F2接种结果证实，lrd40的抗白叶枯病与类病变的表现是一致的。锥虫蓝（trypan blue）染色观察到lrd40的类病变发生可能是一个程序性细胞死亡过程，经二氨基联苯胺（diamino benzidine，DAB）染色检测到lrd40的类病变表达时，叶片上产生H2O2沉淀。细胞学观察结果说明，lrd40的类病变发生类似于植物防卫反应的早期特征，如细胞死亡和过敏反应导致的氧迸发（oxidative burst）。  相似文献   

Molecular-Cytological Identification and Chromosome Behavior Analysis of Telotetrasomic in Rice     

GONG Zhi-yun  GAO Qing-song  YU Heng-xiu  YI Chuan-deng  GU Ming-hong 《水稻科学》2008,15(3):161-165

From the progenies of a telotrisomic of chromosome 9 short arm of an indica rice variety, Zhongxian 3037, a phenotypical variant was selected. The variant plant had rolled leaves, dispersed plant type, as well as a low seed-setting rate. Cytological and molecular cytological investigations revealed two extra chromosomes, which were the shortest in somatic cells of the variant. Fluorescent in situ hybridization (FISH) analysis using a rice centromere specific DNA (RCS2) and a DNA sequence specific for chromosome 9 on premetaphase and pachytene chromosomes showed that these two chromosomes were the short arms of chromosome 9. That is to say, the variant was a telotetrasomic of chromosome 9. Among the 25 pachytene cells, the two telosomic chromosomes paired each other to form a bivalent and didn't pair with other normal chromosome 9 as multivalents in 96% cells. However, the bivalent was easy to disassociate in advance.  相似文献   

水稻不育突变株沈农05-9的形态和细胞学特征鉴定   总被引：1，自引：0，他引：1  

张立爽  郭玉华  林团荣  姜可心  曲明南 《沈阳农业大学学报》2008,39(6)

以辽粳5号与丰锦杂交的高代系的突变株沈农05-9和其原始株系为材料,采用醋酸洋红染色压片技术及石蜡切片技术.进行了形态学特征、小孢子发生的细胞学特征观察.结果表明:该不育突变株花粉表现典败和染败,多数花粉母细胞减数分裂不形成二分体,而形成多核的花粉母细胞;花药表现干瘪且纤维化严重,绒毡层细胞在小孢子发育过程中提前解体.该不育突变株的减数分裂方式类似于萍乡型显性不育系及早稻昆植不育系.导致败育的直接原因为绒毡层细胞提前解体.  相似文献   

菊属植物细胞学与分子细胞遗传学研究进展   总被引：1，自引：0，他引：1  

陈发棣  赵宏波  李畅  陈素梅  房伟民 《南京农业大学学报》2008,31(1):118-126

从染色体倍数性、染色体分带、核型分析、减数分裂行为和染色体原位杂交5个方面对菊属植物的细胞学和分子细胞遗传学研究进展进行了综述。细胞学和分子细胞遗传学研究为菊属种的形成、种间亲缘关系等的确立提供了一定的信息,但同时他们也存在许多局限性,还需要借助分子系统学等手段。  相似文献   

三元杂种及回交后代的遗传性状和细胞学研究     

孙黛珍  李炳林  王曙光  黄晋玲  安泽伟 《棉花学报》2000,12(2):57-61

三元杂种[陆地棉×(亚洲棉×比克氏棉)]的回交后代BC4F1发生疯狂分离,在各个性状上都表现出特殊的变异类型,在育性上分离出三种类型可育株,部分可育株,不育株。对这三种类型和三元杂种F1花粉母细胞减数分裂的观察表明,三元杂种F1及回交后代的不育株减数分裂表现异常,大多染色体不能联会配对,以单价体的形式存在,且有落后染色体、三价体、四体环的出现,在末期形成了不正常的四分孢子和多分孢子,这是不育的主要原因;部分可育株,大部分染色体联会配对成棒状二价体,个别为单价体;可育株染色体配对正常,能形成可育的花粉粒。  相似文献   

Cytological studies on artificially induced gynogenesis in the Pacific abalone   总被引：17，自引：0，他引：17  

Qi Li  Makoto Osada  Masaru Kashihara  Ken Hirohashi and  Akihiro Kijima 《Fisheries Science》2000,66(4):701-707

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