烟草复合抑芽剂的地区适应性使用试验

报导了烟草复合抑芽剂在四川省黔江地区适应性使用试验的结果：抑芽率９５％以上；增产１０．５５ｋｇ／ａ；增值８１．４０元／亩；上等烟增加８％；上、中等烟增加１１％。结果表明，烟草复合抑芽剂的使用效果，不受地区性的影响。     

几种重金属离子及类金属砷对烟草组织培养的影响

本文以烟草为材料，在培养基中添加不同浓度的三种重金属离子(Hg^2-、Pb^2 、Ag^ )及类金属离子砷(As^5 )，经组织培养，发现经处理的烟草生长发育均受到不同程度的抑制．而且叶绿素和可溶性糖含量均比对照降低，仅蛋白质含量在金属及类金属离子浓度低(5ppm、10ppm)时部分升高．其余均降低，当这些重金属及类金属离子在培养基中的难度达到500ppm以上时，烟草的生长发育全被抑制。     

植物中存在新的两组分信号系统基因

两组分信号系统基因最早是从细菌中发现并广泛研究的,它参与细菌许多适应性行为的信号传递过程,最近的研究表明,类似的两组分信号传递系统在真核生物中也存在,如植物中发现的分别与乙烯和细胞分裂素信号传递有关的ＥＴＲＩ和ＣＫＩＩ基因。     

广西卷烟总厂柳州分厂信息化项目建设——生产执行系统

广西卷烟总厂柳州分厂坐落在西南工业重镇——柳州市的东部．是“花园式”工厂，该厂目前拥有总资产23亿元，在岗职工700余人，年卷烟生产能力55万大箱，年实现税利总额超过15亿元，为地方经济的发展做出了积极贡献。企业曾获得“全国五一劳动奖状”、“全国烟草系统先进集体”、“广西效益百强企业”、“自治区级文明单位“等荣誉称号”．     

湖南文理学院电气工程系

电气工程系创立于1978年。现有自动化、通信工程2个本科专业和应用电子技术专科专业。其中，自动化本科专业、控制科学与工程学科分别为学院重点专业和重点建设学科。电气工程系现有教职员工46人，其中教授3人，副教授10人，硕士18人，在读博士3人，省级青年骨干教师2人，国内访问学者5人，常德市有突出贡献专家1人，常德市科技之星1人。经过多年的努力，已拥有一支学术水平高、科研能力强、坚持教书育人、爱岗敬业的教师队伍。电气工程系现有1个院级重点专业——“自动化专业”；1个省级示范式建设实验室——电气信息基础实验室；1个省级优…     

前进中的湖南理工学院

湖南理工学院座落在国家历史文化名城、全国优秀旅游城市岳阳,处名山名水名楼之间,得“求索”“忧乐”文化之精髓,自然环境优美,文化积淀深厚,办学条件得天独厚。学院现有校园面积153．78万平方米(2307亩),校舍总建筑面积54万平方米,其中教学行政用房25．96万平方米,同定资产总值5．8亿元。现设     

Transformation of the salt-tolerant gene of<Emphasis Type="Italic">Avicennia marina</Emphasis> into tobacco plants and cultivation of salt-tolerant lines

Salt-tolerant gene, CSRG1, which was isolated from a kind of salt-tolerant mangroves, Avicennia marina, constructed the transgenic plasmid, pGAM189/CSRG1. CSRG1, GUS, Kmr and Hyg^r could be transferred into tobacco genome by the ameliorated leaf discs method of agro-bacterium-mediate transformation. Thirteen stable resistant lines were obtained when fifty transgenic explants were selected through 50 mg/L hygromycin and 150 mg/L kanamycin. Assessments of PCR amplification, Southern blot analysis and GUS histochemical staining showed that CSRG1 has been integrated into the genome of the eleven transgenic lines (frequency of transformation was 22%). Northern bolt analysis revealed that CSRG1 had expressed in transgenic lines. The assessments of salt-tolerant ability and photosyn-thetic rates indicated that the survival rate of the transgenic lines is 80%—90% and the transgenic lines could increase by 30%—40% in plant height, even when they were cultivated in MS medium containing 2% NaCl and the total seawater (salinity 24). It is supposed that the special physiologic metabolic pathway formed by the products of CSRG1 can really endow the tobacco plants with the high salt-tolerant ability, not only to Na^ stress, but also to the comprehensive stress of various ions.     

AC2 and AC4 proteins of <Emphasis Type="Italic">Tomato yellow leaf curl China virus</Emphasis> and <Emphasis Type="Italic">Tobacco curly shoot virus</Emphasis> mediate suppression of RNA silencing

Tomato yellow leaf curl China virus Y10 isolate (TYLCCNV-Y10) alone could systemically infect host plants such as Nicotiana benthamiana without symptoms. In contrast, Tobacco curly shoot virus Y35 isolate (TbCSV-Y35) alone induces leaf curl symptoms in N. benthamiana. When inoculated into transgenic N. benthamiana plants expressing GFP gene (line 16c), TYLCCNV-Y10 neither reverses the established GFP silencing nor blocks the onset of GFP silencing. In contrast, TbCSV-Y35 can partially reverse the established GFP silencing and block the onset of GFP silencing in new leaves. In the patch co-infiltration assays, the AC2 and AC4 proteins of TYLCCNV-Y10 and TbCSV-Y35 could suppress local GFP silencing and delay systemic GFP silencing, suggesting that they are suppressors of RNA silencing. Comparison of the accumulation levels of GFP mRNA in the co-infiltration patches showed that Y10 AC2 and Y35 AC2 proteins had similar efficiency for suppression of RNA silencing. However, Y35 AC4 protein functioned as a stronger suppressor of RNA silencing than Y10 AC4 protein. There-fore, the pathogenicity difference between TbCSV-Y35 and TYLCCNV-Y10 may be related to the functional difference in their AC4 proteins.